线程学习（五）

public class TestSync implements Runnable{Timer timer=new Timer();public void run(){timer.add(Thread.currentThread().getName());}public static void main(String[] args){TestSync test=new TestSync();Thread t1=new Thread(test);Thread t2=new Thread(test);t1.setName("t1");t2.setName("t2");t1.start();t2.start();}}class Timer{public static int num=0;//synchronized锁定一段代码，含义：当执行这段代码的过程中，锁定当前对象。public synchronized void add(String name){num++;try{Thread.sleep(1);}catch(InterruptedException e){}System.out.println(name+"你是第"+num+"使用Timer的线程");}}

运行结果：