Java 多线程：(一）

一.线程的创建和启动

package com.gatsby.test;

class MyThread extends Thread {

	// 覆写run()方法,作为线程 的操作主体 
	@Override
	public void run() {
		// TODO Auto-generated method stub
		super.run();

		for (int i = 1; i < 13; i++) {
			System.out.println( " ThreagetId->" + getId() + "  " + i);
		}

	}

}

public class RunnableDemo01 {
	public static void main(String[] args) {

		new MyThread().start();

		 // 实例化对象 
		MyThread myThread2 = new MyThread();
		//调用线程主体
		myThread2.start();

	}
}

　程序运行：

 ThreagetId->11  1
 ThreagetId->10  1
 ThreagetId->10  2
 ThreagetId->10  3
 ThreagetId->10  4
 ThreagetId->11  2
 ThreagetId->10  5
 ThreagetId->10  6
 ThreagetId->10  7
 ThreagetId->10  8
 ThreagetId->11  3
 ThreagetId->10  9
 ThreagetId->10  10
 ThreagetId->10  11
 ThreagetId->10  12

　　

package com.gatsby.test;

//通过实现Runnable接口来创建线程类
class MyRunnable implements Runnable{

	// run方法同样是线程执行体
	@Override
	public void run() {
		// TODO Auto-generated method stub
		for (int i = 1; i < 13; i++) {
			System.out.println( " ThreagetId->" +Thread.currentThread().getId() + "  " + i);
		}
		
	}
	
}public class RunnableDemo02 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		MyRunnable myRunnable = new MyRunnable();
		new Thread(myRunnable).start();
	}

}