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SynchronizedTest2_1.java
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55 lines (51 loc) · 1.47 KB
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package Thread.Basic;
/*
*synchronized同步锁：
*当一个线程访问”对象“的synchronized方法或同步块，其他线程访问对该对象的同步方法或同步块将会被阻塞
*
*比较两种情况的区别
* */
public class SynchronizedTest2_1 {
public static void main(String[] args) {
//synchronized中this是myRunnable对象，对myRunnable访问互斥，必须等myRunnable中全部执行完毕后才能执行
System.out.println("-----synchronized Runnable");
myRunnable myRunnable=new myRunnable();
Thread thread1=new Thread(myRunnable,"thread1");
Thread thread2=new Thread(myRunnable,"thread2");
thread1.start();
thread2.start();
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//synchronized中this指Thread对象，新建了两个不同的锁，没有互斥发生
System.out.println("--------synchronized Thread");
Thread thread3=new myThread("thread3");
Thread thread4=new myThread("thread4");
thread3.start();
thread4.start();
}
}
class myRunnable implements Runnable{
public void run() {
synchronized(this){
for(int i=0;i<5;i++){
System.out.println(Thread.currentThread().getName()+" "+i);
}
}
}
}
class myThread extends Thread{
public myThread(String name){
super(name);
}
public void run() {
synchronized(this){
for(int i=0;i<5;i++){
System.out.println(Thread.currentThread().getName()+" "+i);
}
}
}
}