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Topic: 求助请各位大哥指教(..is not abstract and does not override abstract method..)

1.求助请各位大哥指教(..is not abstract and does not override abstract method..)

Posted by: jialichao
Posted on: 2006-05-01 16:26

package one;
interface Add{
public void addNamber(int a,int b);
}
interface Minus{
public int minusNamber(int a,int b);
}
class Account implements Add,Minus{
public void addNumber(int a,int b){
int val;
val=a+b;
System.out.println("a+b= "+val);
}
public int minusNumber(int a,int b){
int val;
val=a-b;
System.out.println("a-b= "+val);

}
}
public class Interface_a{
public static void main(String[] args){
Add obj=new Account();
obj.addNamber(10,20);
Minus obj1=new Account();
obj1.minusNamber(100,50);
}
}
这段程序的出错提示如下：
Interface_a.java:8: one.Account is not abstract and does not override abstract method addNamber(int,int) in one.Add
class Account implements Add,Minus{

小弟实在是不知道这该怎么改了，望各位大哥指教呀。

2.Re:求助请各位大哥指教。 [Re: jialichao]	Copy to clipboard
Posted by: tomcatexpert Posted on: 2006-05-01 16:37 晕啊，你那个实现接口的Account类要用和接口相同的方法名 in your interface Add and Minus, 将addNamber和minusNamber 换成 addNumber 和 minusNumber

3.Re:求助请各位大哥指教(..is not abstract and does not override abstract method..) [Re: jialichao]	Copy to clipboard
Posted by: jialichao Posted on: 2006-05-02 13:08 谢谢大哥，我可能打的时候打错了，呵呵～～太粗心了，经过指点才看到，真谢谢你。

4.Re:求助请各位大哥指教(..is not abstract and does not override abstract method..) [Re: jialichao]	Copy to clipboard
Posted by: tomcatexpert Posted on: 2006-05-02 23:39 用eclipse这样的IDE，这样的粗心它会帮你更正的