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After rewriting Type Information Chapter, added missing @Override

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This commit is contained in:
Bruce Eckel 2021-01-31 15:42:31 -07:00
parent dfdbcf604f
commit 55de56e524
1034 changed files with 102363 additions and 2776 deletions
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5
CI.txt
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@ -1,5 +0,0 @@
Links formerly in the README. Both of these mysteriously started breaking.
[![](https://travis-ci.org/BruceEckel/OnJava8-Examples.svg?branch=master)](https://travis-ci.org/BruceEckel/OnJava8-Examples)
[![](https://ci.appveyor.com/api/projects/status/github/BruceEckel/OnJava8-Examples)](https://ci.appveyor.com/project/BruceEckel/onjava-examples)

2
Copyright.txt
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@ -1,5 +1,5 @@
// Copyright.txt
This computer source code is Copyright ©2020 MindView LLC.
This computer source code is Copyright ©2021 MindView LLC.
All Rights Reserved.
Permission to use, copy, modify, and distribute this

4
annotations/AUComposition.java
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@ -1,5 +1,5 @@
// annotations/AUComposition.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Creating non-embedded tests
@ -23,8 +23,8 @@ public class AUComposition {
}
/* Output:
annotations.AUComposition
. tMethodOne
. tMethodTwo This is methodTwo
. tMethodOne
OK (2 tests)
*/

2
annotations/AUExternalTest.java
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@ -1,5 +1,5 @@
// annotations/AUExternalTest.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Creating non-embedded tests

10
annotations/AtUnitExample1.java
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@ -1,5 +1,5 @@
// annotations/AtUnitExample1.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// {java onjava.atunit.AtUnit
@ -34,15 +34,15 @@ public class AtUnitExample1 {
}
/* Output:
annotations.AtUnitExample1
. m3
. anotherDisappointment (failed)
. methodOneTest
. failureTest (failed)
. m2 This is methodTwo
. failureTest (failed)
. anotherDisappointment (failed)
. m3
(5 tests)
>>> 2 FAILURES <<<
annotations.AtUnitExample1: failureTest
annotations.AtUnitExample1: anotherDisappointment
annotations.AtUnitExample1: failureTest
*/

16
annotations/AtUnitExample2.java
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@ -1,5 +1,5 @@
// annotations/AtUnitExample2.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Assertions and exceptions can be used in @Tests
@ -40,18 +40,18 @@ public class AtUnitExample2 {
}
/* Output:
annotations.AtUnitExample2
. exceptionExample java.io.FileNotFoundException:
nofile.txt (The system cannot find the file specified)
(failed)
. assertExample
. assertAndReturn This is methodTwo
. assertFailureExample java.lang.AssertionError: What
a surprise!
(failed)
. assertExample
. exceptionExample java.io.FileNotFoundException:
nofile.txt (The system cannot find the file specified)
(failed)
. assertAndReturn This is methodTwo
(4 tests)
>>> 2 FAILURES <<<
annotations.AtUnitExample2: exceptionExample
annotations.AtUnitExample2: assertFailureExample
annotations.AtUnitExample2: exceptionExample
*/

4
annotations/AtUnitExample3.java
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@ -1,5 +1,5 @@
// annotations/AtUnitExample3.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// {java onjava.atunit.AtUnit
@ -35,8 +35,8 @@ public class AtUnitExample3 {
/* Output:
annotations.AtUnitExample3
. initialization
. methodOneTest
. m2 This is methodTwo
. methodOneTest
OK (3 tests)
*/

2
annotations/AtUnitExample4.java
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@ -1,5 +1,5 @@
// annotations/AtUnitExample4.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// {java onjava.atunit.AtUnit

5
annotations/AtUnitExample5.java
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@ -1,5 +1,5 @@
// annotations/AtUnitExample5.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// {java onjava.atunit.AtUnit
@ -14,8 +14,7 @@ public class AtUnitExample5 {
public AtUnitExample5(String text) {
this.text = text;
}
@Override
public String toString() { return text; }
@Override public String toString() { return text; }
@TestProperty
static PrintWriter output;
@TestProperty

2
annotations/DemoProcessFiles.java
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@ -1,5 +1,5 @@
// annotations/DemoProcessFiles.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import onjava.ProcessFiles;

4
annotations/HashSetTest.java
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@ -1,5 +1,5 @@
// annotations/HashSetTest.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// {java onjava.atunit.AtUnit
@ -29,8 +29,8 @@ public class HashSetTest {
}
/* Output:
annotations.HashSetTest
. tContains
. initialization
. tRemove
. tContains
OK (3 tests)
*/

2
annotations/PasswordUtils.java
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@ -1,5 +1,5 @@
// annotations/PasswordUtils.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
annotations/SimulatingNull.java
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@ -1,5 +1,5 @@
// annotations/SimulatingNull.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.lang.annotation.*;

2
annotations/StackL.java
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@ -1,5 +1,5 @@
// annotations/StackL.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// A stack built on a LinkedList

4
annotations/StackLStringTst.java
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@ -1,5 +1,5 @@
// annotations/StackLStringTst.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Applying @Unit to generics
@ -35,8 +35,8 @@ StackLStringTst extends StackL<String> {
}
/* Output:
annotations.StackLStringTst
. tPop
. tTop
. tPush
. tPop
OK (3 tests)
*/

2
annotations/Testable.java
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@ -1,5 +1,5 @@
// annotations/Testable.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
package annotations;

2
annotations/UseCase.java
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@ -1,5 +1,5 @@
// annotations/UseCase.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.lang.annotation.*;

6
annotations/UseCaseTracker.java
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@ -1,5 +1,5 @@
// annotations/UseCaseTracker.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;
@ -27,11 +27,11 @@ public class UseCaseTracker {
}
}
/* Output:
Found Use Case 49
New passwords can't equal previously used ones
Found Use Case 48
no description
Found Use Case 47
Passwords must contain at least one numeric
Found Use Case 49
New passwords can't equal previously used ones
Missing use case 50
*/

2
annotations/database/Constraints.java
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@ -1,5 +1,5 @@
// annotations/database/Constraints.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
package annotations.database;

2
annotations/database/DBTable.java
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@ -1,5 +1,5 @@
// annotations/database/DBTable.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
package annotations.database;

7
annotations/database/Member.java
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@ -1,5 +1,5 @@
// annotations/database/Member.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
package annotations.database;
@ -16,7 +16,8 @@ public class Member {
public String getReference() { return reference; }
public String getFirstName() { return firstName; }
public String getLastName() { return lastName; }
@Override
public String toString() { return reference; }
@Override public String toString() {
return reference;
}
public Integer getAge() { return age; }
}

2
annotations/database/SQLInteger.java
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@ -1,5 +1,5 @@
// annotations/database/SQLInteger.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
package annotations.database;

2
annotations/database/SQLString.java
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@ -1,5 +1,5 @@
// annotations/database/SQLString.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
package annotations.database;

2
annotations/database/TableCreator.java
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@ -1,5 +1,5 @@
// annotations/database/TableCreator.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Reflection-based annotation processor

2
annotations/database/Uniqueness.java
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@ -1,5 +1,5 @@
// annotations/database/Uniqueness.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Sample of nested annotations

2
annotations/ifx/ExtractInterface.java
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@ -1,5 +1,5 @@
// annotations/ifx/ExtractInterface.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// javac-based annotation processing

8
annotations/ifx/IfaceExtractorProcessor.java
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@ -1,5 +1,5 @@
// annotations/ifx/IfaceExtractorProcessor.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// javac-based annotation processing
@ -21,14 +21,12 @@ extends AbstractProcessor {
interfaceMethods = new ArrayList<>();
Elements elementUtils;
private ProcessingEnvironment processingEnv;
@Override
public void init(
@Override public void init(
ProcessingEnvironment processingEnv) {
this.processingEnv = processingEnv;
elementUtils = processingEnv.getElementUtils();
}
@Override
public boolean process(
@Override public boolean process(
Set<? extends TypeElement> annotations,
RoundEnvironment env) {
for(Element elem:env.getElementsAnnotatedWith(

2
annotations/ifx/Multiplier.java
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@ -1,5 +1,5 @@
// annotations/ifx/Multiplier.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// javac-based annotation processing

2
annotations/simplest/Simple.java
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@ -1,5 +1,5 @@
// annotations/simplest/Simple.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// A bare-bones annotation

5
annotations/simplest/SimpleProcessor.java
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@ -1,5 +1,5 @@
// annotations/simplest/SimpleProcessor.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// A bare-bones annotation processor
@ -14,8 +14,7 @@ import java.util.*;
@SupportedSourceVersion(SourceVersion.RELEASE_8)
public class SimpleProcessor
extends AbstractProcessor {
@Override
public boolean process(
@Override public boolean process(
Set<? extends TypeElement> annotations,
RoundEnvironment env) {
for(TypeElement t : annotations)

2
annotations/simplest/SimpleTest.java
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@ -1,5 +1,5 @@
// annotations/simplest/SimpleTest.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Test the "Simple" annotation

2
arrays/AlphabeticSearch.java
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@ -1,5 +1,5 @@
// arrays/AlphabeticSearch.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Searching with a Comparator import

5
arrays/ArrayCopying.java
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@ -1,5 +1,5 @@
// arrays/ArrayCopying.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Demonstrate Arrays.copy() and Arrays.copyOf()
@ -10,8 +10,7 @@ import static onjava.ArrayShow.*;
class Sup { // Superclass
private int id;
Sup(int n) { id = n; }
@Override
public String toString() {
@Override public String toString() {
return getClass().getSimpleName() + id;
}
}

2
arrays/ArrayOfGenericType.java
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@ -1,5 +1,5 @@
// arrays/ArrayOfGenericType.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.

2
arrays/ArrayOfGenerics.java
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@ -1,5 +1,5 @@
// arrays/ArrayOfGenerics.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
arrays/ArrayOptions.java
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@ -1,5 +1,5 @@
// arrays/ArrayOptions.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Initialization & re-assignment of arrays

2
arrays/ArraySearching.java
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@ -1,5 +1,5 @@
// arrays/ArraySearching.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Using Arrays.binarySearch()

2
arrays/AssemblingMultidimensionalArrays.java
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@ -1,5 +1,5 @@
// arrays/AssemblingMultidimensionalArrays.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Creating multidimensional arrays

2
arrays/AutoboxingArrays.java
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@ -1,5 +1,5 @@
// arrays/AutoboxingArrays.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

5
arrays/CollectionComparison.java
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@ -1,5 +1,5 @@
// arrays/CollectionComparison.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;
@ -9,8 +9,7 @@ import static onjava.ArrayShow.*;
class BerylliumSphere {
private static long counter;
private final long id = counter++;
@Override
public String toString() {
@Override public String toString() {
return "Sphere " + id;
}
}

8
arrays/CompType.java
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@ -1,5 +1,5 @@
// arrays/CompType.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Implementing Comparable in a class
@ -16,15 +16,13 @@ public class CompType implements Comparable<CompType> {
i = n1;
j = n2;
}
@Override
public String toString() {
@Override public String toString() {
String result = "[i = " + i + ", j = " + j + "]";
if(count++ % 3 == 0)
result += "\n";
return result;
}
@Override
public int compareTo(CompType rv) {
@Override public int compareTo(CompType rv) {
return (i < rv.i ? -1 : (i == rv.i ? 0 : 1));
}
private static SplittableRandom r =

2
arrays/ComparatorTest.java
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@ -1,5 +1,5 @@
// arrays/ComparatorTest.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Implementing a Comparator for a class

2
arrays/ComparingArrays.java
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@ -1,5 +1,5 @@
// arrays/ComparingArrays.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Using Arrays.equals()

2
arrays/CountUpward.java
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@ -1,5 +1,5 @@
// arrays/CountUpward.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
arrays/FillingArrays.java
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@ -1,5 +1,5 @@
// arrays/FillingArrays.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Using Arrays.fill()

2
arrays/IceCreamFlavors.java
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@ -1,5 +1,5 @@
// arrays/IceCreamFlavors.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Returning arrays from methods

2
arrays/ModifyExisting.java
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@ -1,5 +1,5 @@
// arrays/ModifyExisting.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
arrays/MultiDimWrapperArray.java
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@ -1,5 +1,5 @@
// arrays/MultiDimWrapperArray.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Multidimensional arrays of "wrapper" objects

2
arrays/MultidimensionalObjectArrays.java
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@ -1,5 +1,5 @@
// arrays/MultidimensionalObjectArrays.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
arrays/MultidimensionalPrimitiveArray.java
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@ -1,5 +1,5 @@
// arrays/MultidimensionalPrimitiveArray.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
arrays/ParallelPrefix1.java
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@ -1,5 +1,5 @@
// arrays/ParallelPrefix1.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
arrays/ParallelPrefix2.java
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@ -1,5 +1,5 @@
// arrays/ParallelPrefix2.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
arrays/ParallelPrefix3.java
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@ -1,5 +1,5 @@
// arrays/ParallelPrefix3.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// {ExcludeFromTravisCI}

2
arrays/ParallelSetAll.java
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@ -1,5 +1,5 @@
// arrays/ParallelSetAll.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
arrays/ParameterizedArrayType.java
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@ -1,5 +1,5 @@
// arrays/ParameterizedArrayType.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.

4
arrays/PythonLists.py
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@ -1,5 +1,5 @@
# arrays/PythonLists.py
# (c)2020 MindView LLC: see Copyright.txt
# (c)2021 MindView LLC: see Copyright.txt
# We make no guarantees that this code is fit for any purpose.
# Visit http://OnJava8.com for more book information.
@ -20,7 +20,7 @@ class MyList(list): # Inherit from list
reversed.reverse() # Built-in list method
return reversed
# No 'new' necessary for object creation:
# No 'new' necessary for object creation: {#24-no-new-necessary-for-object-creation}
list2 = MyList(aList)
print(type(list2)) # <class '__main__.MyList'>
print(list2.getReversed()) # [8, 7, 6, 5, 4, 3, 2, 1]

2
arrays/RaggedArray.java
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@ -1,5 +1,5 @@
// arrays/RaggedArray.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
arrays/Reverse.java
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@ -1,5 +1,5 @@
// arrays/Reverse.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// The Collections.reverseOrder() Comparator

7
arrays/SimpleSetAll.java
View File

@ -1,5 +1,5 @@
// arrays/SimpleSetAll.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;
@ -8,8 +8,9 @@ import static onjava.ArrayShow.*;
class Bob {
final int id;
Bob(int n) { id = n; }
@Override
public String toString() { return "Bob" + id; }
@Override public String toString() {
return "Bob" + id;
}
}
public class SimpleSetAll {

2
arrays/StreamFromArray.java
View File

@ -1,5 +1,5 @@
// arrays/StreamFromArray.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
arrays/StringSorting.java
View File

@ -1,5 +1,5 @@
// arrays/StringSorting.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Sorting an array of Strings

2
arrays/TestConvertTo.java
View File

@ -1,5 +1,5 @@
// arrays/TestConvertTo.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
arrays/TestCount.java
View File

@ -1,5 +1,5 @@
// arrays/TestCount.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Test counting generators

2
arrays/TestRand.java
View File

@ -1,5 +1,5 @@
// arrays/TestRand.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Test random generators

2
arrays/ThreeDWithNew.java
View File

@ -1,5 +1,5 @@
// arrays/ThreeDWithNew.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
arrays/jmh/ParallelSort.java
View File

@ -1,5 +1,5 @@
// arrays/jmh/ParallelSort.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
package arrays.jmh;

6
collections/AdapterMethodIdiom.java
View File

@ -1,5 +1,5 @@
// collections/AdapterMethodIdiom.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// The "Adapter Method" idiom uses for-in
@ -15,10 +15,12 @@ class ReversibleArrayList<T> extends ArrayList<T> {
public Iterator<T> iterator() {
return new Iterator<T>() {
int current = size() - 1;
public boolean hasNext() {
@Override public boolean hasNext() {
return current > -1;
}
@Override
public T next() { return get(current--); }
@Override
public void remove() { // Not implemented
throw new UnsupportedOperationException();
}

2
collections/AddingGroups.java
View File

@ -1,5 +1,5 @@
// collections/AddingGroups.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Adding groups of elements to Collection objects

2
collections/ApplesAndOrangesWithGenerics.java
View File

@ -1,5 +1,5 @@
// collections/ApplesAndOrangesWithGenerics.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
collections/ApplesAndOrangesWithoutGenerics.java
View File

@ -1,5 +1,5 @@
// collections/ApplesAndOrangesWithoutGenerics.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Simple collection use (suppressing compiler warnings)

2
collections/ArrayIsNotIterable.java
View File

@ -1,5 +1,5 @@
// collections/ArrayIsNotIterable.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
collections/AsListInference.java
View File

@ -1,5 +1,5 @@
// collections/AsListInference.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
collections/CollectionDifferences.java
View File

@ -1,5 +1,5 @@
// collections/CollectionDifferences.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import onjava.*;

10
collections/CollectionSequence.java
View File

@ -1,5 +1,5 @@
// collections/CollectionSequence.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import typeinfo.pets.*;
@ -7,15 +7,13 @@ import java.util.*;
public class CollectionSequence
extends AbstractCollection<Pet> {
private Pet[] pets = Pets.array(8);
private Pet[] pets = new PetCreator().array(8);
@Override
public int size() { return pets.length; }
@Override
public Iterator<Pet> iterator() {
@Override public Iterator<Pet> iterator() {
return new Iterator<Pet>() { // [1]
private int index = 0;
@Override
public boolean hasNext() {
@Override public boolean hasNext() {
return index < pets.length;
}
@Override

4
collections/CrossCollectionIteration.java
View File

@ -1,5 +1,5 @@
// collections/CrossCollectionIteration.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import typeinfo.pets.*;
@ -14,7 +14,7 @@ public class CrossCollectionIteration {
System.out.println();
}
public static void main(String[] args) {
List<Pet> pets = Pets.list(8);
List<Pet> pets = new PetCreator().list(8);
LinkedList<Pet> petsLL = new LinkedList<>(pets);
HashSet<Pet> petsHS = new HashSet<>(pets);
TreeSet<Pet> petsTS = new TreeSet<>(pets);

4
collections/CrossCollectionIteration2.java
View File

@ -1,5 +1,5 @@
// collections/CrossCollectionIteration2.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import typeinfo.pets.*;
@ -15,7 +15,7 @@ public class CrossCollectionIteration2 {
System.out.println();
}
public static void main(String[] args) {
List<Pet> pets = Pets.list(8);
List<Pet> pets = new PetCreator().list(8);
LinkedList<Pet> petsLL = new LinkedList<>(pets);
HashSet<Pet> petsHS = new HashSet<>(pets);
TreeSet<Pet> petsTS = new TreeSet<>(pets);

2
collections/EnvironmentVariables.java
View File

@ -1,5 +1,5 @@
// collections/EnvironmentVariables.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// {VisuallyInspectOutput}

2
collections/ForInCollections.java
View File

@ -1,5 +1,5 @@
// collections/ForInCollections.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// All collections work with for-in

10
collections/GenericsAndUpcasting.java
View File

@ -1,5 +1,5 @@
// collections/GenericsAndUpcasting.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;
@ -21,8 +21,8 @@ public class GenericsAndUpcasting {
}
}
/* Output:
GrannySmith@15db9742
Gala@6d06d69c
Fuji@7852e922
Braeburn@4e25154f
GrannySmith@19e0bfd
Gala@139a55
Fuji@1db9742
Braeburn@106d69c
*/

4
collections/InterfaceVsIterator.java
View File

@ -1,5 +1,5 @@
// collections/InterfaceVsIterator.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import typeinfo.pets.*;
@ -19,7 +19,7 @@ public class InterfaceVsIterator {
System.out.println();
}
public static void main(String[] args) {
List<Pet> petList = Pets.list(8);
List<Pet> petList = new PetCreator().list(8);
Set<Pet> petSet = new HashSet<>(petList);
Map<String, Pet> petMap = new LinkedHashMap<>();
String[] names = ("Ralph, Eric, Robin, Lacey, " +

8
collections/IterableClass.java
View File

@ -1,5 +1,5 @@
// collections/IterableClass.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Anything Iterable works with for-in
@ -9,12 +9,10 @@ public class IterableClass implements Iterable<String> {
protected String[] words = ("And that is how " +
"we know the Earth to be banana-shaped."
).split(" ");
@Override
public Iterator<String> iterator() {
@Override public Iterator<String> iterator() {
return new Iterator<String>() {
private int index = 0;
@Override
public boolean hasNext() {
@Override public boolean hasNext() {
return index < words.length;
}
@Override

14
collections/LinkedListFeatures.java
View File

@ -1,5 +1,5 @@
// collections/LinkedListFeatures.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import typeinfo.pets.*;
@ -8,7 +8,7 @@ import java.util.*;
public class LinkedListFeatures {
public static void main(String[] args) {
LinkedList<Pet> pets =
new LinkedList<>(Pets.list(5));
new LinkedList<>(new PetCreator().list(5));
System.out.println(pets);
// Identical:
System.out.println(
@ -27,9 +27,9 @@ public class LinkedListFeatures {
System.out.println(pets);
pets.addFirst(new Rat());
System.out.println("After addFirst(): " + pets);
pets.offer(Pets.get());
pets.offer(new PetCreator().get());
System.out.println("After offer(): " + pets);
pets.add(Pets.get());
pets.add(new PetCreator().get());
System.out.println("After add(): " + pets);
pets.addLast(new Hamster());
System.out.println("After addLast(): " + pets);
@ -47,8 +47,8 @@ pets.removeFirst(): Manx
pets.poll(): Cymric
[Mutt, Pug]
After addFirst(): [Rat, Mutt, Pug]
After offer(): [Rat, Mutt, Pug, Cymric]
After add(): [Rat, Mutt, Pug, Cymric, Pug]
After addLast(): [Rat, Mutt, Pug, Cymric, Pug, Hamster]
After offer(): [Rat, Mutt, Pug, Rat]
After add(): [Rat, Mutt, Pug, Rat, Rat]
After addLast(): [Rat, Mutt, Pug, Rat, Rat, Hamster]
pets.removeLast(): Hamster
*/

10
collections/ListFeatures.java
View File

@ -1,5 +1,5 @@
// collections/ListFeatures.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import typeinfo.pets.*;
@ -8,7 +8,7 @@ import java.util.*;
public class ListFeatures {
public static void main(String[] args) {
Random rand = new Random(47);
List<Pet> pets = Pets.list(7);
List<Pet> pets = new PetCreator().list(7);
System.out.println("1: " + pets);
Hamster h = new Hamster();
pets.add(h); // Automatically resizes
@ -54,7 +54,7 @@ public class ListFeatures {
pets.clear(); // Remove all elements
System.out.println("19: " + pets);
System.out.println("20: " + pets.isEmpty());
pets.addAll(Pets.list(4));
pets.addAll(new PetCreator().list(4));
System.out.println("21: " + pets);
Object[] o = pets.toArray();
System.out.println("22: " + o[3]);
@ -87,7 +87,7 @@ sub: [Mouse, Pug]
18: false
19: []
20: true
21: [Manx, Cymric, Rat, EgyptianMau]
22: EgyptianMau
21: [Rat, Manx, Cymric, Mutt]
22: Mutt
23: 14
*/

9
collections/ListIteration.java
View File

@ -1,5 +1,5 @@
// collections/ListIteration.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import typeinfo.pets.*;
@ -7,7 +7,7 @@ import java.util.*;
public class ListIteration {
public static void main(String[] args) {
List<Pet> pets = Pets.list(8);
List<Pet> pets = new PetCreator().list(8);
ListIterator<Pet> it = pets.listIterator();
while(it.hasNext())
System.out.print(it.next() +
@ -22,7 +22,7 @@ public class ListIteration {
it = pets.listIterator(3);
while(it.hasNext()) {
it.next();
it.set(Pets.get());
it.set(new PetCreator().get());
}
System.out.println(pets);
}
@ -32,6 +32,5 @@ Rat, 1, 0; Manx, 2, 1; Cymric, 3, 2; Mutt, 4, 3; Pug,
5, 4; Cymric, 6, 5; Pug, 7, 6; Manx, 8, 7;
7 6 5 4 3 2 1 0
[Rat, Manx, Cymric, Mutt, Pug, Cymric, Pug, Manx]
[Rat, Manx, Cymric, Cymric, Rat, EgyptianMau, Hamster,
EgyptianMau]
[Rat, Manx, Cymric, Rat, Rat, Rat, Rat, Rat]
*/

2
collections/MapOfList.java
View File

@ -1,5 +1,5 @@
// collections/MapOfList.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// {java collections.MapOfList}

2
collections/ModifyingArraysAsList.java
View File

@ -1,5 +1,5 @@
// collections/ModifyingArraysAsList.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

7
collections/MultiIterableClass.java
View File

@ -1,5 +1,5 @@
// collections/MultiIterableClass.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Adding several Adapter Methods
@ -11,12 +11,13 @@ public class MultiIterableClass extends IterableClass {
public Iterator<String> iterator() {
return new Iterator<String>() {
int current = words.length - 1;
public boolean hasNext() {
@Override public boolean hasNext() {
return current > -1;
}
public String next() {
@Override public String next() {
return words[current--];
}
@Override
public void remove() { // Not implemented
throw new UnsupportedOperationException();
}

7
collections/NonCollectionSequence.java
View File

@ -1,20 +1,19 @@
// collections/NonCollectionSequence.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import typeinfo.pets.*;
import java.util.*;
class PetSequence {
protected Pet[] pets = Pets.array(8);
protected Pet[] pets = new PetCreator().array(8);
}
public class NonCollectionSequence extends PetSequence {
public Iterator<Pet> iterator() {
return new Iterator<Pet>() {
private int index = 0;
@Override
public boolean hasNext() {
@Override public boolean hasNext() {
return index < pets.length;
}
@Override

2
collections/PetMap.java
View File

@ -1,5 +1,5 @@
// collections/PetMap.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import typeinfo.pets.*;

2
collections/PrintingCollections.java
View File

@ -1,5 +1,5 @@
// collections/PrintingCollections.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Collections print themselves automatically

2
collections/PriorityQueueDemo.java
View File

@ -1,5 +1,5 @@
// collections/PriorityQueueDemo.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
collections/QueueDemo.java
View File

@ -1,5 +1,5 @@
// collections/QueueDemo.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Upcasting to a Queue from a LinkedList

2
collections/SetOfInteger.java
View File

@ -1,5 +1,5 @@
// collections/SetOfInteger.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
collections/SetOfString.java
View File

@ -1,5 +1,5 @@
// collections/SetOfString.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
collections/SetOperations.java
View File

@ -1,5 +1,5 @@
// collections/SetOperations.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
collections/SimpleCollection.java
View File

@ -1,5 +1,5 @@
// collections/SimpleCollection.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

4
collections/SimpleIteration.java
View File

@ -1,5 +1,5 @@
// collections/SimpleIteration.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import typeinfo.pets.*;
@ -7,7 +7,7 @@ import java.util.*;
public class SimpleIteration {
public static void main(String[] args) {
List<Pet> pets = Pets.list(12);
List<Pet> pets = new PetCreator().list(12);
Iterator<Pet> it = pets.iterator();
while(it.hasNext()) {
Pet p = it.next();

2
collections/SortedSetOfString.java
View File

@ -1,5 +1,5 @@
// collections/SortedSetOfString.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

2
collections/StackCollision.java
View File

@ -1,5 +1,5 @@
// collections/StackCollision.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.

2
collections/StackTest.java
View File

@ -1,5 +1,5 @@
// collections/StackTest.java
// (c)2020 MindView LLC: see Copyright.txt
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

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