编写Java程序，使二维数组的行列转换

Question

我做完，只能将相同的行数和列数交换，怎么修改，才能使不同的行数和列数交换啊？还有，结果到最后，全是0，我怎么才能加入元素值啊？
题目是这样子的：编写java程序，从键盘确定数组的维数，从键盘输入二维数组各个元素值，打印输出这个二维数组，并打印输出行列颠倒的二维数组。

public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int c;
        System.out.println("请输入行数：");
        c=in.nextInt(); 
        int b;
        System.out.println("请输入列数：");
        b = in.nextInt();  
        final int size= c;
        final int size1= b;
        int[][] a1=new int[c][b];
        int[][] a2=new int[a1.length][];

        for(int i=0;i<a1.length;i++){

        a2[i]=new int[a1.length];

        }

        for(int i=0;i<a1.length;i++){

        for(int j=0;j<a1.length;j++){

        a2[j][i]=a1[i][j];

        System.out.print(a1[i][j]);

        System.out.print(" ");

        }

        System.out.println();

        }

        System.out.println("转置之后为：");

        for(int m=0;m<a2.length;m++){

        for(int n=0;n<a2.length;n++){

        System.out.print(a2[m][n]);

        System.out.print(" ");

        }

        System.out.println();

        }

        }

Answer 1

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int rows, cols;
        System.out.println("请输入行数：");
        rows = in.nextInt();
        System.out.println("请输入列数：");
        cols = in.nextInt();

        int[][] originalArray = new int[rows][cols];

        // 输入二维数组各个元素值
        System.out.println("请输入二维数组各个元素值：");
        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < cols; j++) {
                originalArray[i][j] = in.nextInt();
            }
        }

        // 打印输出原始二维数组
        System.out.println("原始二维数组为：");
        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < cols; j++) {
                System.out.print(originalArray[i][j] + " ");
            }
            System.out.println();
        }

        // 创建行列颠倒的二维数组
        int[][] transposedArray = new int[cols][rows];

        // 对原始数组进行行列颠倒操作
        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < cols; j++) {
                transposedArray[j][i] = originalArray[i][j];
            }
        }

        // 打印输出行列颠倒的二维数组
        System.out.println("转置之后的二维数组为：");
        for (int i = 0; i < cols; i++) {
            for (int j = 0; j < rows; j++) {
                System.out.print(transposedArray[i][j] + " ");
            }
            System.out.println();
        }
    }
}