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StringBuffer buffer = new StringBuffer();
for (URL url : ((URLClassLoader) (Thread.currentThread().getContextClassLoader())).getURLs()) {
  buffer.append(new File(url.getPath()));
  buffer.append(System.getProperty("path.separator"));
}
 
String classpath = buffer.toString();
int toIndex = classpath.lastIndexOf(System.getProperty("path.separator"));
classpath = classpath.substring(0, toIndex);

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ProcessBuilder builder = new ProcessBuilder("java", "-classpath", classpath, "com.a.b.c.TestProgram", "hello", "world");
// java -classpath [classpath] com.a.b.c.TestProgram hello world
Process process = builder.start();
// Process is now running.
// Block until the process terminates, and then get its exit value.
int exitValue = process.waitFor();

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private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
private final ExecutorService executor = Executors.newFixedThreadPool(1);
private final Set<String> serialsSet = new HashSet<String>();
private static final int NUM_SECONDS = 3;

// ...

private void scheduleTask(final String serial) {
  // Assume this method is called from a thread in executor.
  if (!this.serialsSet.contains(serial)) {

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// ...

if (!this.serialsSet.contains(serial)) { // if (!flag) {
  this.serialsSet.add(serial); // flag = true;
  Runnable task = new Runnable() {
    /** {@inheritDoc} */
    @Override
    public void run() {
      // Use try-finally. Before the thread dies, it will reset the boolean variable.
      try {

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public void setDate(Date date) {
  if (date == null) {
    throw new IllegalArgumentException("date is null");
  }
  this.date = new Date(date.getTime());
}

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private static final int NUM_ITERATIONS = 100;

// ...

System.out.println("Warming up...");
for (int i = 1; i <= NUM_ITERATIONS; i++) {
  for (Node node : nodes) {
    Band<Float> band = createBand(Float.class);
    Random random = new Random();
    statsMap.put(band, new Stats(band, random.nextInt(200),

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public class ExampleClientService implements ExampleListener {

  private final List<ExampleListener> listeners = new ArrayList<ExampleListener>();
  private final List<Example> examples = new ArrayList<Example>();

  public void addExampleListener(ExampleListener listener) {
    listeners.add(listener);
  }

  public void removeExampleListener(ExampleListener listener) {

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ExampleListener listener = new ExampleListener();
ExampleClientService service = new ExampleClientService();
service.addExampleListener(listener);

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public class ExampleClientService {

  private final List<ExampleListener> listeners = new ArrayList<ExampleListener>();
  private final List<Example> examples = new ArrayList<Example>();

  private final ExampleListenerImpl listener = new ExampleListenerImpl();

  public ExampleClientService(ExamplesManager examplesManager) {
    examplesManager.addExampleListener(this.listener);
  }

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public class StudentId implements Serializable {

}

public class InstructorId implements Serializable {

}