Java基础-多线程实现顺序执行

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/wanlong360599336/article/details/60580940

1.效果图：

2.代码：

//可以继承Thread重写run函数
public class MultipleThreadStudy extends Thread {
    /*
	MultipleThreadStudy(){}
	MultipleThreadStudy(String name){
		super(name);
	}*/
	//重写Thread的run函数
	public void run(){
		for(int i=0;i<10;i++)
		{
			System.out.print("MultipleThreadStudy:i="+i);
			
			try
			{
				Thread.sleep((int)Math.random()*1000);
			}
			catch(Exception e)
			{
				e.printStackTrace();
			}
			System.out.println("");
		}
	}
	
	//******************************************多线程*********************************************************
	//不论是用继承的Thread方法还是用Runnable接口实现的方法，java里面的多个线程同时运行时，不是顺序执行，而是并行执行
	//如果需要顺序执行，则需加判断前一个线程是否执行完毕
	//如果要顺序执行，方法一：判断线程isAlive是否在运行中，不停循环直至结束
	//方法二：调用join方法
	//快捷键注释代码：Ctrl+Shift+/     (/*  */  形式的) 或   Ctrl+/   (//  形式的)
	//快捷键取消注释：Ctrl+Shift+\     (/*  */  形式的) 或   Ctrl+/   (//  形式的)
	public static void main(String[] args) {
		//************继承Thread重写run函数的线程***************
		MultipleThreadStudy thread1=new MultipleThreadStudy();
		MultipleThreadStudy thread2=new MultipleThreadStudy();
		MultipleThreadStudy thread3=new MultipleThreadStudy();
		//thread1.setPriority(1);  //设置优先级
		//thread2.setPriority(2);
		//thread3.setPriority(3);
		System.out.println("............thread1 run...............");
		thread1.start();
		//方法一：判断线程isAlive是否在运行中，不停循环直至结束
		while(thread1.isAlive())
		{
			try
			{
				Thread.sleep(100);
			}
			catch(Exception e)
			{
				e.printStackTrace();
			}
		}
		System.out.println("............thread2 run...............");
		thread2.start();
		while(thread2.isAlive())
		{
			try
			{
				Thread.sleep(100);
			}
			catch(Exception e)
			{
				e.printStackTrace();
			}
		}
		System.out.println("............thread3 run...............");
		thread3.start();
		while(thread3.isAlive())
		{
			try
			{
				Thread.sleep(100);
			}
			catch(Exception e)
			{
				e.printStackTrace();
			}
		}
		
		//************实现Runnable的接口方法run函数*************
		Runnable rb1=new RunnableThread();
		Runnable rb2=new RunnableThread();
		Runnable rb3=new RunnableThread();
		Thread runnableThread1=new Thread(rb1);//鼠标移到Thread，按alt+/的方式看需传的参数
		Thread runnableThread2=new Thread(rb2);
		Thread runnableThread3=new Thread(rb3);
		System.out.println("...runnableThread1 run...");
		runnableThread1.start();
		//方法二：调用join方法
	    try
	    {
			runnableThread1.join();
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
	    System.out.println("...runnableThread2 run...");
		runnableThread2.start();
		try
		{
			runnableThread2.join();
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
		System.out.println("...runnableThread3 run...");
		runnableThread3.start();
	}
}
//可以实现Runnable的接口方法run函数
class RunnableThread implements Runnable{
	public void run(){
		for(int i=0;i<10;i++)
		{
			System.out.print("RunnableThread:i="+i);
			
			try
			{
				Thread.sleep((int)Math.random()*1000);
			}
			catch(Exception e)
			{
				e.printStackTrace();
			}
			System.out.println("");
		}
	}
}