ThreadSynchronized实例

package testng;

import java.util.HashMap;
import java.util.Hashtable;

public class ThreadSynchronized {

//全局变量，多线程同时操作，会出现脏读，写问题
private static int a=0;

private static final String lock="";

private static void threadTest() { 
    for (int i = 0; i < 10; i++) {  
        new Thread() {  
            public void run() {
            	//资源互斥
            	synchronized (ThreadSynchronized.class) { 
                a++;  
                try {  
                    Thread.sleep(300);  
                } catch (InterruptedException e) {  
                    e.printStackTrace();  
                }
                System.out.println("plus:" + Thread.currentThread().getName() + ": " + a);  
             }
            }
        }.start();  
    }  
} 

public static void main(String[] args) {
	threadTest(); 
	
}

}

输出结果：

plus:Thread-0: 1
plus:Thread-9: 2
plus:Thread-7: 3
plus:Thread-8: 4
plus:Thread-6: 5
plus:Thread-5: 6
plus:Thread-4: 7
plus:Thread-3: 8
plus:Thread-2: 9
plus:Thread-1: 10