冒泡排序

/**
 * 冒泡排序
 */
private static void bubbleSort(int[] arr) {
    int temp;
    for (int j = 0; j < arr.length - 1; j++) {
        //每一轮都和旁边的元素做比较
        for (int i = 0; i < arr.length - 1 - j; i++) {
            if (arr[i] > arr[i + 1]) {
                //交换
                temp = arr[i + 1];
                arr[i + 1] = arr[i];
                arr[i] = temp;
            }
        }
    }
    System.out.println(Arrays.toString(arr));
}

选择排序

/**
 * 选择排序
 */
private static void selectSort(int[] arr) {
    int length = arr.length;
    int temp;
    for (int j = 0; j < length - 1; j++) {
        //每一轮都挨个比较
        for (int i = j; i < length - 1; i++) {
            if (arr[j] > arr[i + 1]) {
                //交换
                temp = arr[j];
                arr[j] = arr[i + 1];
                arr[i + 1] = temp;
            }
        }
    }
    System.out.println(Arrays.toString(arr));
}

完整代码

public class Main {
    public static void main(String[] args) {
        int[] arr1 = {2, 3, 6, 4, 0, 1, 7, 8, 5, 9};
        int[] arr2 = {2, 3, 6, 4, 0, 1, 7, 8, 5, 9};
        bubbleSort(arr1);
        System.out.println("----------------------------");
        selectSort(arr2);
    }

    /**
     * 冒泡排序
     */
    private static void bubbleSort(int[] arr) {
        int temp;
        for (int j = 0; j < arr.length - 1; j++) {
            //每一轮都和旁边的元素做比较
            for (int i = 0; i < arr.length - 1 - j; i++) {
                if (arr[i] > arr[i + 1]) {
                    //交换
                    temp = arr[i + 1];
                    arr[i + 1] = arr[i];
                    arr[i] = temp;
                }
            }
        }
        System.out.println(Arrays.toString(arr));
    }

    /**
     * 选择排序
     */
    private static void selectSort(int[] arr) {
        int length = arr.length;
        int temp;
        for (int j = 0; j < length - 1; j++) {
            //每一轮都挨个比较
            for (int i = j; i < length - 1; i++) {
                if (arr[j] > arr[i + 1]) {
                    //交换
                    temp = arr[j];
                    arr[j] = arr[i + 1];
                    arr[i + 1] = temp;
                }
            }
        }
        System.out.println(Arrays.toString(arr));
    }
}