实例分析Java单线程与多线程

public class SingleThread {
	public static void main(String[] args){
		Thread thread = Thread.currentThread(); //获取当前运行的线程对象
		thread.setName("单线程"); //线程重命名
		System.out.println(thread.getName()+"正在运行");
		for(int i=0;i<10;i++){
			System.out.println("线程正在休眠："+i);
			try {
				thread.sleep(1000); //线程休眠，延迟一秒
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
				System.out.println("线程出错");
			}
		}
	}
}

public class TestThread {
	public static void main(String[] args){
		 Thread t1 = new ExtendThread("t1",1000); //使用上转对象创建线程，并构造线程名字和线程休眠时间
		 Thread t2 = new ExtendThread("t2",2000); 
		 Thread t3 = new ExtendThread("t3",3000); 
		 t1.start(); //启动线程并调用run方法
		 t2.start();
		 t3.start();
	}
}
class ExtendThread extends Thread{ //继承Thread的类
	String name;
	int time;
	public ExtendThread(String name, int time) { //构造线程名字和休眠时间
		this.name=name;
		this.time=time;
	}	
	public void run(){ //重写Thread类的run方法
		try{
			sleep(time); //所有线程加入休眠
		}
		catch(InterruptedExceptione){
			e.printStackTrace();
			System.out.println("线程中断异常");
		}
		System.out.println("名称为："+name+",线程休眠："+time+"毫秒"); 
	}
}

public class RunnableThread {
	public static void main(String[] args){
		Runnable r1=new ImplRunnable("r1",1000); //Runnable接口必须依托Thread类才能创建线程
		Thread t1=new Thread(r1); //Runnable并不能调用start()方法，因为不是线程，所以要用Thread类加入线程
		Runnable r2=new ImplRunnable("r2",2000);
		Thread t2=new Thread(r2);
		Runnable r3=new ImplRunnable("r3",3000);
		Thread t3=new Thread(r3);
		
		t1.start(); //启动线程并调用run方法
		t2.start();
		t3.start();
	}
}
class ImplRunnable implements Runnable{ //继承Runnable接口的类
	String name;
	int time;	
	public ImplRunnable(String name, int time) { //构造线程名字和休眠时间
		this.name = name;
		this.time = time;
	}

	@Override
	public void run() { //实现Runnable的run方法
		try{
			Thread.sleep(time); //所有线程加入休眠
		}
		catch(InterruptedException e){
			e.printStackTrace();
			System.out.println("线程中断异常");
		}
		System.out.println("名称为："+name+",线程休眠："+time+"毫秒");
	}
}