java 对象锁示例

来源：互联网发布：java sip 协议栈编辑：程序博客网时间：2024/05/17 02:37

import java.util.ArrayList;
import java.util.List;

public class Testing {

   private List<String> list = new ArrayList<String>();

   public class cThread extends Thread{
       public void run(){
           while(true){
               synchronized (list){
                   System.out.println("thread on "+System.currentTimeMillis());
                   for(String str : list){
                       try {
                           sleep(500);
                       } catch (InterruptedException e) {
                           // TODO Auto-generated catch block
                           e.printStackTrace();
                       }
                       System.out.println(str);
                   }
               }
           }
       }
   }

   public void testing(){
       new cThread().start();
       for(int i=0;i<10;i++){
           synchronized (list){
               System.out.println("add "+i+" on "+System.currentTimeMillis());
               list.add(i+"");
           }

           try {
               Thread.sleep(1000);
           } catch (InterruptedException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
           }
       }
   }

   public static void main(String[] argv){
       new Testing().testing();

   }

}