五种内部类形式将线程隐藏于类中

1.使用普通内部类继承Thread类

public class ThreadTestOne {

    private int countDown = 5;
    private Inner inner;
    private class Inner extends Thread{

        Inner(String name){
            super(name);
            start();
        }

        public void run(){
            while(true){
                System.out.println(this);
                if(--countDown == 0)
                    return;
                try{
                    sleep(10);
                }catch(InterruptedException e){
                    throw new RuntimeException(e);
                }
            }
        }

        public String toString(){
            return "#"+getName()+":"+countDown;
        }
    }

    public ThreadTestOne(String name){
        inner = new Inner(name);
    }

}

2.使用匿名内部类构造Thread类。重写run（）方法

public class ThreadTestTwo {

    private int countDown = 5;
    private Thread t;

    public ThreadTestTwo(String name){
        t = new Thread(name){
            public void run(){
                while(true){
                    System.out.println(this);
                    if(--countDown == 0)
                        return;
                    try{
                        sleep(10);
                    }catch(InterruptedException e){
                        throw new RuntimeException(e);
                    }
                }
            }

            public String toString(){
                return "#"+getName()+":"+countDown;
            }
        };
        t.start();
    }
}

3.使用普通内部类实现Runnable类

public class RunnableTestOne {
    private int countDown = 5;
    private Inner inner;
    private class Inner implements Runnable{
        Thread t;
        Inner(String name){
            t = new Thread(this,name);
            t.start();
        }

        public void run(){
            while(true){
                System.out.println(this);
                if(--countDown == 0)
                    return;
                try{
                    Thread.sleep(10);
                }catch(InterruptedException e){
                    throw new RuntimeException(e);
                }
            }
        }

        public String toString(){
            return "#"+Thread.currentThread().getName()+":"+countDown;
        }
    }

    public RunnableTestOne(String name){
        inner = new Inner(name);
    }
}

4.使用匿名内部类构造Thread类，參数1构造一个Runnable对象，參数2指明线程名称

public class RunnableTestTwo {

    private int countDown = 5;
    private Thread t;

    public RunnableTestTwo(String name){
        t = new Thread(new Runnable(){

            public void run(){
                while(true){
                    System.out.println(this);
                    if(--countDown == 0)
                        return;
                    try{
                        Thread.sleep(10);
                    }catch(InterruptedException e){
                        throw new RuntimeException(e);
                    }
                }
            }

            public String toString(){
                return "#"+Thread.currentThread().getName()+":"+countDown;
            }
        },name);
        t.start();
    }
}

5.使用局部内部类。即在方法内部构造Thread类。重写run（）方法

public class ThreadMethod {

    private int countDown = 5;
    private Thread t;
    private String name;

    public ThreadMethod(String name){
        this.name = name;
    }

    public void runThread(){
        if(t == null){
            t = new Thread(name){

                public void run(){

                    while(true){
                        System.out.println(this);
                        if(--countDown == 0)
                            return;
                        try{
                            sleep(10);
                        }catch(InterruptedException e){
                            throw new RuntimeException(e);
                        }
                    }
                }

                public String toString(){
                    return "#"+getName()+":"+countDown;
                }
            };
            t.start();
        }
    }
}