Question

如果我在主目录中添加了三个扫描仪，但我的程序仅“正确”运行，但是如果删除它们，则会出现“无法解析符号fnum，snum和total”错误。我该如何从主类的CalculatorClass调用此方法？

package com.company;
import java.util.Scanner;
public class Main {

    public static void main(String[] args) {



    Scanner nameInput = new Scanner(System.in);
    NameInputClass nameInputClassObject = new NameInputClass();
    System.out.println("Hello! Please enter your name");
    String name = nameInput.nextLine();
    nameInputClassObject.nameInput(name);

    Scanner input1 = new Scanner(System.in);
    int fnum = input1.nextInt();
    Scanner input2 = new Scanner(System.in);
    int snum = input1.nextInt();
    Scanner input3 = new Scanner(System.in);
    int total = input1.nextInt();
    CalculatorClass calculatorClassObject = new CalculatorClass();
    calculatorClassObject.calcInput(snum,fnum,total);


public class NameInputClass {
public static void nameInput(String name){
System.out.println("Hello "+name);}}


import java.util.Scanner;
public class CalculatorClass {
public static void calcInput(int fnum, int snum, int total){
    System.out.println("Give first number");
    Scanner firstNumber = new Scanner(System.in);
     fnum = firstNumber.nextInt();
    System.out.println("Give second number");
    Scanner secondNumber = new Scanner(System.in);
     snum = firstNumber.nextInt();
    total = fnum + snum;
    System.out.println("your total = " +total);

   }
 }

Answer 1

您将创建Main对象。 Main main = new Main();

但是我建议您应该正确分离所有对象和功能。创建类和对象的正确方法。

然后在您的主站中全部调用。

来自另一个类的问题调用方法

1 个答案: