java - 参数不匹配；方法无法转换为TimerTask

Question

我不断收到此类错误:

error: no suitable method found for schedule(soccer,int)

method Timer.schedule(TimerTask,long) is not applicable

(argument mismatch; soccer cannot be converted to TimerTask)

method Timer.schedule(TimerTask,Date) is not applicable

(argument mismatch; soccer cannot be converted to TimerTask)

import java.util.*;
public class Balls{
    private static int time = 1;

    public static void main(String[] args){
        int a=0,b=0,c=0,d=0,e=0;
        volley one = new volley();
        beach two = new beach();
        soccer three = new soccer();
        basket four = new basket();
        pokemon five = new pokemon();

        Timer myTime1 = new Timer();
        Timer myTime2 = new Timer();
        Timer myTime3 = new Timer();
        Timer myTime4 = new Timer();
        Timer myTime5 = new Timer();

        for(int x=0; x<20000; x+=5000){
            if(x==5000){
                myTime1.schedule(one,(x-1000));
                myTime1.schedule(two,(x+500));
                myTime1.schedule(three,(x-500));
                myTime1.schedule(four,(x+1000));
                myTime1.schedule(five,(x-500));
            }
            else if(x==10000){
                myTime1.schedule(one,(x+500));
                myTime1.schedule(two,(x-1000));
                myTime1.schedule(three,(x+1000));
                myTime1.schedule(four,(x-500));
                myTime1.schedule(five,(x+500));
            }
            else if(x==15000){
                myTime1.schedule(one,(x-500));
                myTime1.schedule(two,(x+1000));
                myTime1.schedule(three,(x+500));
                myTime1.schedule(four,(x+500));
                myTime1.schedule(five,(x+1000));
            }
            else if(x==20000){
                myTime1.schedule(one,(x+1000));
                myTime1.schedule(two,(x-500));
                myTime1.schedule(three,(x-1000));
                myTime1.schedule(four,(x-1000));
                myTime1.schedule(five,(x-1000));
            }
            else{
                break;
            }
        }    
    }
}

class volley extends TimerTask{
public void run(){
    System.out.println("Volley ball");
}
}
class beach extends TimerTask{
public void run(){
    System.out.println("Beach ball");
}
}
class soccer{
public void run(){
    System.out.println("Soccer ball");
}
}
class basket{
public void run(){
    System.out.println("Basket ball");
}
}
class pokemon{
public void run(){
    System.out.println("Pokemon Ball");
}
}

第一次发帖，发帖不好，抱歉。

Answer 1

类 soccer 需要扩展 TimerTask 才能由 Timer 调度，如下所示:

class soccer extends TimerTask {
   @Override
   public void run(){
       System.out.println("Soccer ball");
   }
}

这同样适用于篮子和口袋妖怪类别。

实际上，您的代码无法编译，因为这些类不是 TimerTask 的实例，并且您尝试在 myTime1.schedule 中使用它们