代碼
package per.thread; import java.io.IOException; public class Test {
private int i = 0;
private Object object = new Object();
public static void main(String[] args) throws IOException {
Test test = new Test(); Test.MyThread thread1 = test.new MyThread();
Test.MyThread thread2 = test.new MyThread(); thread1.start();
thread2.start(); }
class MyThread extends Thread{ @Override public void run() {
synchronized (object) { i++; System.out.println("i:"+i); try {
System.out.println("線程"+Thread.currentThread().getName()+"進入睡眠狀態");
Thread.currentThread().sleep(10000); } catch (InterruptedException e) {
// TODO: handle exception
}
System.out.println("線程"+Thread.currentThread().getName()+"睡眠結束");
i++; System.out.println("i:"+i); } } } }
實現
i:1
線程Thread-0進入睡眠狀態
線程Thread-0睡眠結束
i:2
i:3
線程Thread-1進入睡眠狀態
線程Thread-1睡眠結束
i:4
分析
在thread1休眠之後，thread2沒有立即執行，因為給object加了synchronized。
[e36605 ] Java使用synchronized實現互斥鎖功能示例已經有241次圍觀
