Java使用synchronized怎么实现互斥锁功能

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("线程"+Thread.currentThread().getName()+"进入睡眠状态");
          Thread.currentThread().sleep(10000);
        } catch (InterruptedException e) {
          // TODO: handle exception
        }
        System.out.println("线程"+Thread.currentThread().getName()+"睡眠结束");
        i++;
        System.out.println("i:"+i);
      }
    }
  }
}