threadtest.java

来自「JAVA 2应用开发指南」· Java 代码 · 共 34 行

public class ThreadTest{
  public static void main( String args[] ){
    PrintThread thread1, thread2, thread3, thread4;
    thread1 = new PrintThread( "thread1" );
    thread2 = new PrintThread( "thread2" );
    thread3 = new PrintThread( "thread3" );
    thread4 = new PrintThread( "thread4" );
    System.err.println( "\nStarting threads" );
    thread1.start();
    thread2.start();
    thread3.start();
    thread4.start();
    System.err.println( "Threads started\n" );
  }
} // end class ThreadTester
class PrintThread extends Thread {
  private int sleepTime;
  public PrintThread( String name ){
    super( name );
    sleepTime = (int) ( Math.random() * 5000 );
    System.err.println("Name: " + getName() + "; sleep: " + sleepTime );
  }
  public void run(){
    try {
      System.err.println( getName() + " going to sleep" );
      Thread.sleep( sleepTime );
    }
    catch ( InterruptedException interruptedException ) {
      System.err.println( interruptedException.toString() );
    }
    System.err.println( getName() + " done sleeping" );
  }
}