Java中 synchronize、wait和notify3

package com.java.lang.thread.synchronized_example;

public class _Thread extends Thread {

	@Override
	public synchronized void run() {
		for(int i=0;i<5;i++){
			System.out.println("in run method");
			try {
				Thread.sleep(2000);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}
	
	public synchronized void print1(){
		for(int i=0;i<5;i++){
			System.out.println("in print1 method");
			try {
				Thread.sleep(2000);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}

	public void print2(){
		for(int i=0;i<5;i++){
			System.out.println("in print2 method");
			try {
				Thread.sleep(2000);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}
	
}

package com.java.lang.thread.synchronized_example;

public class _Main {
	public static void main(String[] args) {
		_Thread thread1 = new _Thread();
		thread1.start();
		
		
		_Thread thread2 = new _Thread();
		thread2.print1();
		
		
		_Thread thread3 = new _Thread();
		thread3.print2();
	}
}