Question

指出下列Java程序中的错误，并修改使之能够正常运行。

指出下列Java程序中的错误，并修改使之能够正常运行。
1. class WhatThread implements Runnable{
2. public static void main(String args[]){
3. Thread t=new Thread(this);
4. t.start();
5. }
6. public void run(){
7. System.out.println("hello");
8. }
9. }

Answer 1

class WhatThread implements Runnable {
WhatThread() {
Thread t = new Thread(this);
t.start();
}
public static void main(String args[]) {
new WhatThread();
}

public void run() {
System.out.println("hello");
}
}

Answer 2

1. class WhatThread implements Runnable{
2. public static void main(String args[]){
3. Thread t=new Thread(new WhatThread());
4. t.start();
5. }
6. public void run(){
7. System.out.println("hello");
8. }
9. }

Answer 3

Thread t=new Thread(new WhatThread());
即可。