java多线程实现方式

第一种方式 继承Thread

public class ThreadTest extends Thread {
	
	private String name; //定义一个属性
	
	public ThreadTest(String name){//构造方法
		this.name=name;
		
	}
	
	public void run(){//重写run()方法
		System.out.println(this.name +"_______"+ new Date());
		
	}
	

}

public class ThreadTest3 {
	public static void main(String[] args) {
		ThreadTest mt1=new ThreadTest("线程1");
		ThreadTest mt2=new ThreadTest("线程2");
		ThreadTest mt3=new ThreadTest("线程3");
		//启动
		mt1.start();
		mt3.start();
		mt2.start();
	}

}

 

第二种实现方式实现Runnable接口

public class ThreadTest2 implements Runnable {
	private String name;
	public ThreadTest2(String name){
		this.name=name;
	}

	@Override
	public void run() {
		System.out.println(this.name+"________"+new Date());
	}

}


public class ThreadTest4 {

	public static void main(String[] args) {
		
		ThreadTest2 mt=new ThreadTest2("A");
		ThreadTest2 mt1=new ThreadTest2("B");
		ThreadTest2 mt2=new ThreadTest2("C");
	    
		Thread thread = new Thread(mt);
		Thread thread2 = new Thread(mt1);
		Thread thread3 = new Thread(mt2);
		
		thread.start();
		thread2.start();
		thread3.start();
	}
}

 

  

 

 

 第三种方式 实现Callable（有返回值）

 

 

public class CallableTest implements Callable<String> {
    private String name;
    public CallableTest(String name) {
		this.name=name;
	}
    
	@Override
	public String call() throws Exception {
		return "你好"+"----------"+this.name;
	}

    

}

public class CallableMain {
	public static void main(String[] args) {

		CallableTest mt1=new CallableTest("A");
		CallableTest mt2=new CallableTest("B");
		CallableTest mt3=new CallableTest("C"); 

		FutureTask<String> futureTask = new FutureTask<String>(mt1);
		FutureTask<String> futureTask2 = new FutureTask<String>(mt2);
		FutureTask<String> futureTask3 = new FutureTask<String>(mt3);
	
		new Thread(futureTask).start(); 
		new Thread(futureTask2).start(); 
		new Thread(futureTask3).start(); 
		
		try {
			System.out.println(futureTask.get());
			System.out.println(futureTask2.get());
			System.out.println(futureTask3.get());
		
		} catch (Exception e) {
		
		}
		
	}


}