如何使用 Java 将多行数据转换为行列格式？

import java.util.arrays;

public class dataconversion {

    public static void main(string[] args) {

        // 源数据（行结构）
        string[][] sourcedata = {
            {"class one", "1", "english", "84"},
            {"class one", "1", "math", "77"},
            {"class one", "1", "pe", "69"},
            {"class one", "2", "english", "81"},
            {"class one", "2", "math", "80"}
        };

        // 行转列转换
        string[][] transposeddata = transpose(sourcedata);

        // 输出转换后的数据（列结构）
        for (string[] row : transposeddata) {
            system.out.println(arrays.tostring(row));
        }
    }

    private static string[][] transpose(string[][] data) {
        int rows = data.length;
        int cols = data[0].length;

        // 初始化转换后数组
        string[][] transposeddata = new string[cols][rows];

        // 行转列
        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < cols; j++) {
                transposeddata[j][i] = data[i][j];
            }
        }

        return transposeddata;
    }
}

[Class one, 1, 84, 77, 69]
[1, 2, 81, 80, null]
[English, Math, PE, null, null]