求大神看看這個(gè)錯(cuò)誤在哪
public void Area() {
// TODO Auto-generated method stub
Scanner a = new Scanner(System.in);
int w = a.nextInt();
Scanner b = new Scanner(System.in);
int l = b.nextInt();
double area = w*l;
System.out.println(area);
}
@Override
public void Cir() {
// TODO Auto-generated method stub
Scanner a = new Scanner(System.in);
int w = a.nextInt();
Scanner b = new Scanner(System.in);
int l = b.nextInt();
int cir = 2*(w+l);
System.out.println(cir);
}
為什么一直顯示public void Area() 和public void Cir()錯(cuò)誤
2017-04-29
@Override 把這個(gè)標(biāo)簽 干掉！方法前添加這個(gè)便簽的意義你還沒學(xué)到，編譯器自己會(huì)自動(dòng)生成，但是請(qǐng)你干掉他！
2017-04-16
import java.util.Scanner;
public class Demo1 {
public void Area() {
// TODO Auto-generated method stub
Scanner a = new Scanner(System.in);
int w = a.nextInt();
Scanner b = new Scanner(System.in);
int l = b.nextInt();
double area = w*l;
System.out.println(area);
}
public void Cir() {
Scanner a = new Scanner(System.in);
int w = a.nextInt();
Scanner b = new Scanner(System.in);
int l = b.nextInt();
int cir = 2*(w+l);
System.out.println(cir);
}
}
2017-04-16
你這部分代碼應(yīng)該是沒問題，我補(bǔ)充了個(gè)main，執(zhí)行了一下，可以執(zhí)行，完整代碼：
//包名
package com.practice;
//導(dǎo)入Scanner
import java.util.Scanner;
public class HellWorld {
public static void main(String[] args) {
// TODO Auto-generated method stub
? ? ? ? HellWorld ?rec1 = new HellWorld();
? ? ? ? rec1.Area();
? ? ? ? rec1.Cir();
}
public void Area() {
// TODO Auto-generated method stub
Scanner a = new Scanner(System.in);
int w = a.nextInt();
Scanner b = new Scanner(System.in);
int l = b.nextInt();
double area = w*l;
System.out.println(area);
}
//@Override
public void Cir() {
// TODO Auto-generated method stub
Scanner a = new Scanner(System.in);
int w = a.nextInt();
Scanner b = new Scanner(System.in);
int l = b.nextInt();
int cir = 2*(w+l);
System.out.println(cir);
}
}