/*這是一個同級別3個線程的演示示例
 *程序的名稱：ThreadExam10_6.java
 */
public class Exam10_6 extends Thread
{	
  static int n1=0,n2=0,n3=0;
  public Exam10_6(String strName)
  {
   this.setName(strName);     //命名線程
   this.setDaemon(true);      //設置線程為守護線程
  }
  public void run()
  {
   while(true)
   {
     if(n3>=3) System.exit(0); //執行3次后結束運行
     String name=Thread.currentThread().getName(); //獲取線程名
     if(name.equals("a")) 
     { 
       n1++;
       System.out.println("線程a第"+n1+"次執行");
     }  
     else if(name.equals("b"))
     { 
       n2++;
       System.out.println("        線程b第"+n2+"次執行");
     }  
     else if(name.equals("c"))
     { 
       n3++;
       System.out.println("                線程c第"+n3+"次執行");
     }
    }
  }  
  public static void main(String [] args)
  {
	Exam10_6 thread_a = new Exam10_6("a");  //創建線程對象a
	Exam10_6 thread_b = new Exam10_6("b");  //創建線程對象b
	Exam10_6 thread_c = new Exam10_6("c");  //創建線程對象c
	thread_b.setPriority(10);
	thread_c.setPriority(8);
	thread_a.start();    //啟動線程a
    thread_b.start();    //啟動線程b
	thread_c.start();    //啟動線程c
  }
}