深入同步语法

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1.深入synchronized关键字

class Service{public void fun1(){synchronized(this){try{Thread.sleep(3 * 1000);}catch(Exception e){System.out.println(e);}System.outprintln(fun1);}}public void fun2(){synchronized(this){System.out.println(fun2);}}}

class MyThread1 implements Runnable{private Service service;public MyThread1(Service service){this.service = service;}public void run{service.fun1();}}

class MyThread2 implements Runnable{private Service service;public MyThread2(Service service){this.service = service;}public void run{service.fun2();}}

class Test{public static void main(String args[]){Service service = new Service();Thread1 t1 = new Thread1(new MyThread1(service));Thread2 t2 = new Thread2(new MyThread2(service));}}

2.同步方法

class Service{//同步方法只需要把synchronized放在返回值（void）的前面即可public synchronized void fun1(){try{Thread.sleep(3 * 1000);}catch(Exception e){System.out.println(e);}System.outprintln(fun1);}public synchronized void fun2(){System.out.println(fun2);}}

同步方法跟同步代码快的功能类似，只不过同步代码快可以指定究竟锁住哪一个对象，而同步方法锁住的就是this

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