//利用两个线程实现1到100的计算
public class MyRannable implements  java.lang.Runnable{private Thread th_0;private Thread th_2;int sum=0;//存储累加和的结果int i=1;public void run(){String thName=Thread.currentThread().getName();//获取当前线程的名字while (i<=101){System.out.println( "当前线程"+thName+"正在计算" );System.out.println( "当前的累加和" +sum);sum+=i++;if(i==50&&thName.equals( "线程1" )){break;}try {Thread.sleep( 100 );}catch (InterruptedException e){e.printStackTrace();}}}public MyRannable(Thread t0,Thread t2){if(t0==null){th_0=new Thread( this );//th0和th2共享一个实现runnable的实例}if(t2==null){th_2=new Thread( this );}th_0.setName( "线程1" );th_2.setName( "线程2" );th_0.start();//启动线程t0try {th_0.join();}catch (InterruptedException e){e.printStackTrace();}th_2.start();}
}

测试类

public class test106 {public static void main(String[] args){//Thread t0=new Thread(  );//t0.setName( "线程1" );//Thread t2=new Thread(  );//t2.setName( "线程2" );Thread t0=null;Thread t2=null;MyRannable ran=new MyRannable( t0,t2 );}
}

运行结果