Question

我正在尝试对数组m1进行排序并将其打印

import java.util.Arrays;

public class Foo {

public static void main(String[] args) {

    int[][] m1 = { { 14, 11, 13, 12 },

                { 18, 15, 13, 13 },

                { 19, 16, 15, 17 } };

    int[][] temp = m1.clone();

    sortRows(m1);

    displayArray(m1);

    m1 = temp;

}

public static int[][] sortRows(int[][] m) {

    for (int i = 0; i <= 2; i++) {

        Arrays.sort( m[i] );

    }

    return m;

}

public static void displayArray(int[][] m) { 

    //method to print array

  }
}

如何在main方法中删除数组重复并恢复原始数据？我想将它移到SortArrays方法

Answer 1

多维数组中的每个数组（使用Java）也是Object，因此您需要对每个数组执行深层复制。如果我理解你的问题，你可以做类似

的事情

public static void main(String[] args) {
    int[][] m1 = { { 14, 11, 13, 12 }, { 18, 15, 13, 13 },
            { 19, 16, 15, 17 } };
    int[][] temp = new int[m1.length][]; // <-- a new array for the copies.
    for (int i = 0; i < m1.length; i++) {
        temp[i] = m1[i].clone();         // <-- copy each row.
        Arrays.sort(temp[i]);            // <-- sort each row.
    }
    System.out.println("Original: " + Arrays.deepToString(m1));
    System.out.println("Sorted copy: " + Arrays.deepToString(temp));
}

输出

Original: [[14, 11, 13, 12], [18, 15, 13, 13], [19, 16, 15, 17]]
Sorted copy: [[11, 12, 13, 14], [13, 13, 15, 18], [15, 16, 17, 19]]

在不更改原始数据的情况下对2D数组中的每一行进

1 个答案: