shareresource.java

多线程 课堂讲解代码 很经典的

public class ShareResource {
  public static void main(String[] args) {
    SumThread number1 = new SumThread(1);

    Thread thread1 = new Thread(number1);
    Thread thread2 = new Thread(number1);

    thread1.start();
    thread2.start();
  } // main()方法结束
} // 类ShareResource结束

 // 声明SumThread类
class SumThread implements Runnable {
  int num;
  int sum = 0;
  public SumThread(int num) {
    this.num = num;
  }

  public void run() {        // 重载run方法
    for (int i=1; i < 5; i++) {
      sum = sum + i;
      System.out.println((new Thread(this)).currentThread().toString() + sum);
      try {
          Thread.sleep((int)(Math.random() * 50));
      } catch (InterruptedException e ) {
          System.out.println(e.getMessage());
      } // try/catch 块结束
    } // for 结束
    System.out.println(sum);
  } // run()方法结束
} // 类SumThread结束