Cleanup and fixes

lowlevel/Atomicity.java

@@ -16,26 +16,26 @@ public class Atomicity {
   public Atomicity();
     Code:
        0: aload_0
-       1: invokespecial #1                  // Method
+       1: invokespecial #1     // Method
 java/lang/Object."<init>":()V
        4: return
   void f1();
     Code:
        0: aload_0
        1: dup
-       2: getfield      #2                  // Field i:I
+       2: getfield      #2     // Field i:I
        5: iconst_1
        6: iadd
-       7: putfield      #2                  // Field i:I
+       7: putfield      #2     // Field i:I
       10: return
   void f2();
     Code:
        0: aload_0
        1: dup
-       2: getfield      #2                  // Field i:I
+       2: getfield      #2     // Field i:I
        5: iconst_3
        6: iadd
-       7: putfield      #2                  // Field i:I
+       7: putfield      #2     // Field i:I
       10: return
 }
 */

lowlevel/AtomicityTest.java

@@ -8,7 +8,9 @@ import onjava.TimedAbort;
 public class AtomicityTest implements Runnable {
   private int i = 0;
   public int getValue() { return i; }
-  private synchronized void evenIncrement() { i++; i++; }
+  private synchronized void evenIncrement() {
+    i++; i++;
+  }
   @Override
   public void run() {
     while(true)
@@ -16,7 +18,8 @@ public class AtomicityTest implements Runnable {
   }
   public static void main(String[] args) {
     new TimedAbort(4);
-    ExecutorService es = Executors.newCachedThreadPool();
+    ExecutorService es =
+      Executors.newCachedThreadPool();
     AtomicityTest at = new AtomicityTest();
     es.execute(at);
     while(true) {

lowlevel/CriticalSection.java

@@ -6,8 +6,8 @@
 // Synchronizing blocks instead of entire methods. Also
 // demonstrates protection of a non-thread-safe class
 // with a thread-safe one.
-// {java threads.CriticalSection}
+// {java lowlevel.CriticalSection}
-package threads;
+package lowlevel;
 import java.util.concurrent.*;
 import java.util.concurrent.atomic.*;
 import java.util.*;

lowlevel/ExplicitCriticalSection.java

@@ -4,8 +4,8 @@
 // Visit http://OnJava8.com for more book information.
 // {ThrowsException} on a multiprocessor machine
 // Using explicit Lock objects to create critical sections
-// {java threads.ExplicitCriticalSection}
+// {java lowlevel.ExplicitCriticalSection}
-package threads;
+package lowlevel;
 import java.util.concurrent.locks.*;
 
 // Synchronize the entire method:

lowlevel/QuittableTask.java

@@ -1,16 +0,0 @@
-// lowlevel/QuittableTask.java
-// (c)2017 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.Nap;
-
-public class QuittableTask implements Runnable {
-  private boolean running = true;
-  public void quit() { running = false; }
-  public boolean running() { return running; }
-  @Override
-  public void run() {
-    while(running)
-      new Nap(100);
-  }
-}

lowlevel/QuittingTasks.java

@@ -1,31 +0,0 @@
-// lowlevel/QuittingTasks.java
-// (c)2017 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.*;
-import java.util.stream.*;
-import java.util.concurrent.*;
-
-public class QuittingTasks {
-  public static void main(String[] args)
-    throws InterruptedException {
-    ExecutorService exec =
-      Executors.newCachedThreadPool();
-    List<QuittableTask> tasks =
-      IntStream.range(1, 1000)
-        .mapToObj(i -> new QuittableTask())
-        .peek(exec::execute)
-        .collect(Collectors.toList());
-    TimeUnit.MILLISECONDS.sleep(100);
-    tasks.forEach(QuittableTask::quit);
-    exec.shutdown();
-    exec.awaitTermination(1, TimeUnit.SECONDS);
-    // See if any tasks are still running:
-    System.out.println(
-      tasks.stream()
-        .anyMatch(QuittableTask::running));
-  }
-}
-/* Output:
-false
-*/