java synchronized 超简单好理解实例

import java.util.concurrent.locks.Lock;

 import java.util.concurrent.locks.ReadWriteLock;

 import java.util.concurrent.locks.ReentrantReadWriteLock;



 public class TableControl implements Runnable {



     private int i = 0;



     /**

      * 这样的话，运行时先print100等10秒再print200

      */

     public synchronized void add(int v) {

         i += v;

         System.out.println(i);

         try {

             Thread.sleep(10000);

         } catch (InterruptedException e) {

             e.printStackTrace();

         }

     }



     @Override

     public void run() {

         add(100);

     }
}

public class TestMain {


     public static void main(String args[]) {


         TableControl tc = new TableControl();
         Thread t1 = new Thread(tc);
         Thread t2 = new Thread(tc);


         t1.start();
         t2.start();


     }


 }