java - 转置二维数组仅适用于矩形数组 - Java

Question

我有一个类，它的方法可以在给定数组、行和列的情况下转置数组

public class Transpose {

public static void main(String[] args) {
    int[][] array = new int[6][5];

    System.out.println("Original:");
    for(int i = 0; i < array.length; i++)
    {
        for(int j = 0; j < array[i].length; j++)
        {
            array[i][j] += i+1;
            System.out.print(array[i][j] + " ");
        }
        System.out.println();
    }
    System.out.println();
    transpose(array, 6, 5);
}

public static void transpose(int[][] array, int arrayRows, int arrayColumns)
{
    int[][] transposedArray = new int[arrayRows][arrayColumns];
    System.out.println("Transposed:");
    for(int i = 0; i < array.length; i++)
    {
        for(int j = 0; j < array[i].length; j++)
        {
            transposedArray[i][j] = array[j][i];
            System.out.print(transposedArray[i][j] + " ");
        }
        System.out.println();
    }
}
}

我得到的输出如下所示:

Original:
1 1 1 1 1 
2 2 2 2 2 
3 3 3 3 3 
4 4 4 4 4 
5 5 5 5 5 
6 6 6 6 6 

Transposed:
1 2 3 4 5 
1 2 3 4 5 
1 2 3 4 5 
1 2 3 4 5 
1 2 3 4 5 

我意识到该方法仅在 arrayRows 和 arrayColumns 的值相同时才有效，例如:6、6 或 5, 5。我尝试将值彼此相反，将行放在列中，反之亦然，但它不起作用。如何使该方法适用于非矩形/方形数组？

Answer 1

请参阅行注释以获取解释。这些是我修改的唯一几行。

public static void transpose(int[][] array, int arrayRows, int arrayColumns) {
    int[][] transposedArray = new int[arrayColumns][arrayRows]; //swap number of rows and columns
    System.out.println("Transposed:");
    for (int i = 0; i < transposedArray.length; i++) { //take the length of transposedArray, not array
        for (int j = 0; j < transposedArray[i].length; j++) { //take the length of transposedArray, not array
            transposedArray[i][j] = array[j][i];
            System.out.print(transposedArray[i][j] + " ");
        }
        System.out.println();
    }
}