Thread的Synchronized例子

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class ThreadSubName implements Runnable{
private static int num = 5;
public void run(){
  while(true){
   synchronized(this){
    if(num>0){
     try{
      Thread.sleep(100);
     }catch(Exception e){
      System.out.println(Thread.currentThread().getName()+"occur error");
     }
     System.out.println(Thread.currentThread().getName()+ " num="+num--);
    } else {
     System.out.println(Thread.currentThread().getName()+" exit");
     break;
    }
   }
  }
}
}
public class test1 {
public static void main(String[] args){
  ThreadSubName t = new ThreadSubName();
  new Thread(t).start();
  new Thread(t).start();
}
}

///////////////////////////////////

public class ThreadDemo {
public static void main(String[] args){
  ThreadTest1 t1 = new ThreadTest1();
  new Thread(t1).start();
  new Thread(t1).start();
  System.out.println(t1.call());
}
}

class ThreadTest1 implements Runnable{
private int x;
private int y;
//定义同步方法
public synchronized void run(){
  for(int i=0;i<4;i++){
   x++;
   y++;
   try{
    Thread.sleep(200);
   } catch (InterruptedException e){
    System.out.println("thread err");
    e.printStackTrace();
   }
   System.out.println(Thread.currentThread().getName()+" x="+x+",y="+y+" i="+i);
  }
}
//自定义的方法,并声明为synchronized
public synchronized String call(){
  String name = Thread.currentThread().getName();
  return "hello" + name;
}
}