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;
    }
}

我希望以上内容能有所帮助。如果你需要帮助理解代码，我很乐意解释。

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

如果其中一个数字<=0，则b为假；如果两者都大于0，则b为真

由于您希望输入同时进行，请尝试：

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.");
    }
}