3回答

• 

  没了哆啦A梦的大熊

  2017-04-29 17:11:17

  @Override 把这个标签 干掉！方法前添加这个便签的意义你还没学到，编译器自己会自动生成，但是请你干掉他！

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• 

  慕粉163300228

  2017-04-16 20:41:53

  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);

  
  

  }

  }

  
  

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• 

  慕桂英9156406

  2017-04-16 20:41:20

  你这部分代码应该是没问题，我补充了个main，执行了一下，可以执行，完整代码：

  //包名

  package com.practice;

  //导入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);

  }

  }

  
  

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