01_線程的創建和啟動

public class MyThread extends Thread {
 
private int count=0;
@Override
public void run()
{
System.out.println("線程已啟動");
while(count<10000) {
count++;
}
System.out.println("count:"+count);
}
}
 

public class TestMyThread {
/*
* 繼承Thread類創建線程
* 1、繼承Thread類
* 2、重寫run方法
* 3、實例化線程對象
* 4、調用start方法啟動線程
*
* 繼承Thread類會存在什麼問題？
* 線程類不能繼承其他類
*/
public static void main(String[] args)
{
//實例化線程對象
Thread myThread=new MyThread();
//啟動線程
myThread.start();
/*
* start方法的作用：該方法會使操作系統初始化一個新的線程，由這個新的線程來執行線程對象的run方法
*/
}
}

public class MyRunnable implements Runnable {
private int count=0;
@Override
public void run() {
count++;
System.out.println("count:"+count);
}
}

public class TestMyRunnable {
 
public static void main(String[] args) {
// TODO Auto-generated method stub
Runnable my=new MyRunnable();
 
System.out.println("thread啟動了");
Thread thread=new Thread(my);
 
System.out.println("thread2啟動了");
Thread thread_2=new Thread(my);
thread.start();
thread_2.start();
}
 
}