在Java中，如何对2D数组同时按行升序和按列降序排序？

import java.util.Comparator;

class ColumnComparator implements Comparator<int[]> {
    @Override
    public int compare(int[] row1, int[] row2) {
        return Integer.compare(row2[columnIndex], row1[columnIndex]);
    }
}

import java.util.Arrays;

public class Main {
    public static void main(String[] args) {
        int[][] arr = {{5, 4, 3}, {2, 1, 6}, {9, 8, 7}};

        Arrays.sort(arr, Comparator.comparingInt(row -> row[0]));
    }
}

import java.util.Arrays;
import java.util.Comparator;

class ColumnComparator implements Comparator<int[]> {
    private final int columnIndex;

    public ColumnComparator(int columnIndex) {
        this.columnIndex = columnIndex;
    }

    @Override
    public int compare(int[] row1, int[] row2) {
        return Integer.compare(row2[columnIndex], row1[columnIndex]);
    }
}

public class Main {
    public static void main(String[] args) {
        int[][] arr = {{5, 4, 3}, {2, 1, 6}, {9, 8, 7}};
        int columnIndex = 1;

        Arrays.sort(arr, Comparator.comparingInt(row -> row[0]));
        Arrays.sort(arr, new ColumnComparator(columnIndex));
    }
}