java中数组排序方法

方法1：Arrays.sort(T[] arr);
方法2：冒泡排序（从数组末端位置开始排最大值或最小值）;
方法3：选择排序（从数组起始位置开始排最大值或最小值）。

public class TestSortArray {

    private static int[] arr01 = new int[]{12, 24, 4, 35, 7, 26};

    public static void main(String[] args) {

        int[] arr02 = arr01.clone();
        int[] arr03 = arr01.clone();

        sortArray(arr01);
        System.out.println("====================================");
        bubbleSortArray(arr02);
        System.out.println("====================================");
        selectSortArray(arr03);
    }

    private static void sortArray(int[] arr) {
        Arrays.sort(arr);
        System.out.println(Arrays.toString(arr));
    }

    // 冒泡排序，从小到大
    private static void bubbleSortArray(int[] arr) {

        int temp;

        for (int i = 1; i < arr.length; i++) {
            for (int k = 0; k < arr.length - 1; k++) {
                if (arr[k] > arr[k + 1]) {
                    temp = arr[k];
                    arr[k] = arr[k + 1];
                    arr[k + 1] = temp;
                }
            }
            System.out.println(Arrays.toString(arr));
        }

        System.out.println(Arrays.toString(arr));
    }

    // 选择排序，从小到大
    private static void selectSortArray(int[] arr) {

        int temp;

        for (int i = 0; i < arr.length - 1; i++) {
            for (int k = i + 1; k < arr.length; k++) {
                if (arr[i] > arr[k]) {
                    temp = arr[i];
                    arr[i] = arr[k];
                    arr[k] = temp;
                }
            }
            System.out.println(Arrays.toString(arr));
        }

        System.out.println(Arrays.toString(arr));
    }
}

执行结果如下：

引用

[4, 7, 12, 24, 26, 35]
====================================
[12, 4, 24, 7, 26, 35]
[4, 12, 7, 24, 26, 35]
[4, 7, 12, 24, 26, 35]
[4, 7, 12, 24, 26, 35]
[4, 7, 12, 24, 26, 35]
[4, 7, 12, 24, 26, 35]
====================================
[4, 24, 12, 35, 7, 26]
[4, 7, 24, 35, 12, 26]
[4, 7, 12, 35, 24, 26]
[4, 7, 12, 24, 35, 26]
[4, 7, 12, 24, 26, 35]
[4, 7, 12, 24, 26, 35]