11、 编写一个Java程序实现多线程，在线程中输出线程的名字，隔300毫秒输出一次，共输出20次。

// programme name TestThread;
// 声明一个子线程类Threaddemo;
class ThreadDemo extends Thread {
public ThreadDemo(String str) {
super(str);
}
public void run() {
   for(int i=0;i<20;i++){
System.out.print(“  ”+this.getName());
Try {
Sleep(300);
}catch(InterruptedException e){
System.out.println(e.getMessage());
Return;
}
}
System.out.println(“  /end”);
}
}
public class TestThread {
public static void main( String args[] ) {
  ThreadDemo thread1=new ThreadDemo(“T1”);
  ThreadDemo thread2=new ThreadDemo(“T2”);
  ThreadDemo thread3=new ThreadDemo(“T3”);
  thread1.start();
  thread2.start();
  thread3.start();
}
}11、 编写一个Java程序实现多线程，在线程中输出线程的名字，隔300毫秒输出一次，共输出20次。

// programme name TestThread;
// 声明一个子线程类Threaddemo;
class ThreadDemo extends Thread {
public ThreadDemo(String str) {
super(str);
}
public void run() {
   for(int i=0;i<20;i++){
System.out.print(“  ”+this.getName());
Try {
Sleep(300);
}catch(InterruptedException e){
System.out.println(e.getMessage());
Return;
}
}
System.out.println(“  /end”);
}
}
public class TestThread {
public static void main( String args[] ) {
  ThreadDemo thread1=new ThreadDemo(“T1”);
  ThreadDemo thread2=new ThreadDemo(“T2”);
  ThreadDemo thread3=new ThreadDemo(“T3”);
  thread1.start();
  thread2.start();
  thread3.start();
}
}

完全手编，还是看书敲代码出来的！