testrunnable.java

本书是一本为Java学习者在基础内容学习结束后进行课程设计时提供参考的指导书

package apibook.c2.s3;

public class TestRunnable {
  public static void main(String[] args) {
    Thread r=null;
    for (int i=0;i<4 ;i++ ) {
      r=new Thread(new cr(i));
      r.start();
    }
  }
}
class cr implements Runnable{
  private int k;
  public cr(int j){
    k=j;
  }
  public void run(){
    for (int i=0;i<1000 ;i++ ) {
      synchronized(System.out){
        System.out.println("cr"+k);
          try {
            this.wait();
            this.notifyAll();
          }
          catch (Exception ex) {
          }
      }
    }
  }
}