/* 
 * 建立執行緒時要繼承Runnable介面 
 * 不要把寶貴的單繼承機會佔有掉 
 * 兩種方式有點不用，實現Runnable 
 * 介面時多個執行緒中執行一個 
 * Runnable介面實現類時，run方法資源共享 
 * 而繼承Thread時，run方法資源是 
 * 不能共享的！ 
 */  
public class Test_Runnable_Thread {  
  
    public static void main(String[] args) {  
        /* 
         * 下面的程式碼執行400次列印語句 
         */  
        SubThread subT1 = new SubThread();  
        SubThread subT2 = new SubThread();  
        SubThread subT3 = new SubThread();  
        SubThread subT4 = new SubThread();  
        subT1.start();  
        subT2.start();  
        subT3.start();  
        subT4.start();  
  
        /* 
         * 下面的程式碼執行100次列印語句 
         */  
        SubRunnable subR = new SubRunnable();  
        Thread th1 = new Thread(subR);  
        Thread th2 = new Thread(subR);  
        Thread th3 = new Thread(subR);  
        Thread th4 = new Thread(subR);  
        th1.start();  
        th2.start();  
        th3.start();  
        th4.start();  
  
    }  
  
}  
  
class SubRunnable implements Runnable {  
  
    private int id = 100;  
  
    @Override  
    public void run() {  
        while (true) { // 請自動關閉死迴圈，為了效果設定死迴圈 dos視窗中ctrl+c關閉  
            if (id > 0) {  
                System.out.println(Thread.currentThread().getName() + "run..."  
                        + id--);  
            }  
        }  
    }  
  
}  
  
class SubThread extends Thread {  
  
    private int id = 100;  
  
    @Override  
    public void run() {  
        while (true) { // 請自動關閉死迴圈，為了效果設定死迴圈 dos視窗中ctrl+c關閉  
            if (id > 0) {  
                System.out.println(Thread.currentThread().getName() + "run..."  
                        + id--);  
            }  
        }  
    }  
  
}