Java线程操作的常见方法【线程名称获取、设置、线程启动判断等】

public class GetNameThreadDemo extends Thread{  public void run()  {   for( int i = 0; i < 5; ++i )   {     printMsg();     try     {      Thread.sleep(1000);    // 睡眠1秒     }     catch( InterruptedException e )     {      e.printStackTrace();     }   }  }  public void printMsg()  {   // 获得运行此代码的线程的引用   Thread t = Thread.currentThread();   String name = t.getName();   System.out.println( "name = " + name );  }  public static void main( String[] args )  {   GetNameThreadDemo t1 = new GetNameThreadDemo();   t1.start();   for( int i = 0; i < 5; ++i )   {     t1.printMsg();     try     {      Thread.sleep(1000);    // 睡眠1秒     }     catch( InterruptedException e )     {      e.printStackTrace();     }   }  }}

public class GetSetNameThreadDemo implements Runnable{  public void run( )  {    Thread temp = Thread.currentThread( );//获取执行这条语句的线程实例    System.out.println("执行这条语句的线程名字:" + temp.getName( ));  }  public static void main(String[] args)  {    Thread t = new Thread(new GetSetNameThreadDemo( ));    t.setName("线程_范例演示");    t.start();  }}

public class StartThreadDemo extends Thread{  public void run()  {   for( int i = 0; i < 5; ++i )   {     printMsg();   }  }  public void printMsg()  {   // 获得运行此代码的线程的引用   Thread t = Thread.currentThread();   String name = t.getName();   System.out.println( "name = " + name );  }  public static void main( String[] args )  {   StartThreadDemo t = new StartThreadDemo();   t.setName( "test Thread" );   System.out.println( "调用start()方法之前 , t.isAlive() = " + t.isAlive() );   t.start();   System.out.println( "刚调用start()方法时 , t.isAlive() = " + t.isAlive() );   for( int i = 0; i < 5; ++i )   {     t.printMsg();   }   // 下面语句的输出结果是不固定的，有时输出false，有时输出true   System.out.println( "main()方法结束时 , t.isAlive() = " + t.isAlive() );  }}