多線程輸出預計不到

-2

我是新來的Java和多線程的概念。這裏是我的實驗代碼：多線程輸出預計不到

public class Multithread implements Runnable { 

    Thread t; 

    public Multithread(int prior, String name) { 
     this.t = new Thread(this, name); 
     this.t.setPriority(prior); 
     this.t.start(); 
    } 

    public void run() { 
     for (int i = 1; i <= 5; i++) { 
      if (this.t.getName().equals("thread1")) { 
       System.out.println("First Child Thread Loop No " + i); 
      } 
      else { 
       System.out.println("Second Child Thread Loop No " + i); 
      } 

      try { 
       Thread.sleep(1000); 
      } catch (InterruptedException e) { 
       System.out.println(e); 
      } 
     } 
    } 

    public static void main(String[] args) { 
     new Multithread(10, "thread1"); 
     new Multithread(7, "thread2"); 
    } 
}

輸出是：

First Child Thread Loop No 1 
Second Child Thread Loop No 1 
First Child Thread Loop No 2 
Second Child Thread Loop No 2 
Second Child Thread Loop No 3 
First Child Thread Loop No 3 
Second Child Thread Loop No 4 
First Child Thread Loop No 4 
Second Child Thread Loop No 5 
First Child Thread Loop No 5

嗯，我預計會有這樣簡單：

First Child Thread Loop No 1 
Second Child Thread Loop No 1 
First Child Thread Loop No 2 
Second Child Thread Loop No 2 
First Child Thread Loop No 3 
Second Child Thread Loop No 3 
First Child Thread Loop No 4 
Second Child Thread Loop No 4 
First Child Thread Loop No 5 
Second Child Thread Loop No 5

我期望能獲得前總是執行第一線第二個線程。請解釋我的輸出。提前致謝。

來源

2013-10-13 chetan mehta

我永遠不會理解這些問題。如果你想要一個特定的執行順序，爲什麼你使用線程？ – EJP

@EJP我認爲這種程序只是一個不懂線程並想學習的人編寫的測試。 –

@Patricia雅正好。我只是想學習與多個線程 –