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Fixed issue #46

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This commit is contained in:
Bruce Eckel 2021-04-18 09:35:27 -06:00
parent a75a55dc81
commit 5ef986390e
2 changed files with 3 additions and 5 deletions
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6
generics/Diamond.java
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@ -3,11 +3,9 @@
// We make no guarantees that this code is fit for any purpose. // We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information. // Visit http://OnJava8.com for more book information.
class Bob {}
public class Diamond<T> { public class Diamond<T> {
public static void main(String[] args) { public static void main(String[] args) {
GenericHolder<Bob> h3 = new GenericHolder<>(); GenericHolder<Automobile> h3 =
h3.set(new Bob()); new GenericHolder<>();
} }
} }

2
generics/GenericHolder.java
View File

@ -10,7 +10,7 @@ public class GenericHolder<T> {
public T get() { return a; } public T get() { return a; }
public static void main(String[] args) { public static void main(String[] args) {
GenericHolder<Automobile> h3 = GenericHolder<Automobile> h3 =
new GenericHolder<>(); new GenericHolder<Automobile>();
h3.set(new Automobile()); // type checked h3.set(new Automobile()); // type checked
Automobile a = h3.get(); // No cast needed Automobile a = h3.get(); // No cast needed
//- h3.set("Not an Automobile"); // Error //- h3.set("Not an Automobile"); // Error