接受 2 个整数作为控制台输入并验证每个整数是否 > 0答案

【问题标题】：Accepting 2 integers as console input & verify that each is an integer > 0接受 2 个整数作为控制台输入并验证每个整数是否 > 0
【发布时间】：2021-09-18 08:10:03
【问题描述】：

这是我的代码：

System.out.print("Enter the number of ROWS and COLUMNS of the array : ");
Scanner sc = new Scanner(System.in);
int numRows = sc.nextInt();
int numColumns = sc.nextInt();

【问题讨论】：

标签： java validation input integer

【解决方案1】：

import java.util.Scanner;

public class ArrayRowColumnInputVerify {

    public static void main(String[] args) {
        
        int rows = accept_user_input("ROWS");
        int cols = accept_user_input("COLUMNS");
        System.out.println("The rows and columns you entered are : " +rows  + " rows & " + cols + " columns.");
        
    }

    public static int  accept_user_input(String dimension) {
        int input_dimension=0;
        boolean input_correct=false;
        while(!input_correct) {
            System.out.print("Please, enter the number of " + dimension + " of the array : ");
            Scanner sc = new Scanner(System.in);
            input_dimension = sc.nextInt();
            if (input_dimension>0) {
                input_correct=true;
            } else {
                System.out.print("The number you entered " + input_dimension + " must be greater than 0. ");
            }
        }
        return input_dimension;
    }
    
}

我希望以上内容有所帮助。如果您在理解代码方面需要帮助，我很乐意为您解释。

【讨论】：

一项要求是使用 1 个提示捕获行和列。很抱歉造成混乱。
@RobertLewis 我已经发布了另一个答案，按照您的要求同时接受这两个答案。

【解决方案2】：

boolean b = (numRows > 0 && numColums > 0);
System.out.println("Each number is > 0" + b);

如果其中一个数字 b 将为假；如果两者都 > 0，则 b 为真

【讨论】：

【解决方案3】：

既然您希望输入是同时的，不妨试试：

import java.util.Scanner;

public class ArrayRowColumnInputVerify2 {

    public static void main(String[] args) {
        
        int[] dimensions = accept_user_input("ROWS & COLUMNS");
        System.out.println("The rows and columns you entered are : " +dimensions[0]  + " rows & " + dimensions[1] + " columns.");
        
    }

    public static int[]  accept_user_input(String dimension) {
        int rows=0;
        int cols=0;

        boolean input_correct=false;
        while(!input_correct) {
            System.out.print("Please, enter the number of " + dimension + " of the array : ");
            Scanner sc = new Scanner(System.in);
            rows = sc.nextInt();
            cols = sc.nextInt();
            if (rows>0 && cols>0) {
                input_correct=true;
            } else {
                System.out.print("The number you entered :  rows:" + rows + " & cols:"+ cols + " must be greater than 0. ");
            }
        }
        int[] input = {rows, cols};
        return input;
    }
    
}

进一步简化：

import java.util.Scanner;

public class ArrayRowColumnInputVerify2 {

    public static void main(String[] args) {

        int rows=0;
        int cols=0;

        boolean input_correct=false;
        while(!input_correct) {
        System.out.print("Please, enter the number of ROWS & COLUMNS of the array : ");
            Scanner sc = new Scanner(System.in);
            rows = sc.nextInt();
            cols = sc.nextInt();
            if (rows>0 && cols>0) {
                input_correct=true;
            } else {
                System.out.print("The number you entered :  rows:" + rows + " & cols:"+ cols + " must be greater than 0. ");
            }
        }
        
        System.out.println("The rows and columns you entered are : " +rows  + " rows & " + cols + " columns.");
        
    }


    
}

【讨论】：