• 冒泡排序

public int[] BubbleSort(int[] arr) {
        // write code here
        for (int i = 0; i < arr.length - 1; i++) {
            for (int j = 0; j < arr.length - 1 - i; j++) {
                if (arr[j] > arr[j + 1]) {
                    int temp = arr[j];
                    arr[j] = arr[j + 1];
                    arr[j + 1] = temp;
                }
            }
        }
        return arr;
    }

• 插入排序

 public int[] InsertSort(int[] arr) {
        // write code here
        for (int i = 0; i < arr.length; i++) {
            for (int j = i - 1; j >= 0 && arr[j] > arr[j + 1]; j--) {
                swap(arr, j, j + 1);
            }
        }
        return arr;
    }
    private static void swap(int[] arr, int j, int i) {
        arr[i] = arr[i] ^ arr[j];
        arr[j] = arr[i] ^ arr[j];
        arr[i] = arr[i] ^ arr[j];
    }

• 选择排序

public int[] MySort (int[] arr) {
        // write code here
        for (int i = 0; i < arr.length-1; i++) {
            int minIndex=i;
            for (int j = i+1; j < arr.length ; j++) {
                minIndex= arr[minIndex]>arr[j] ? j:minIndex;
            }
            swap(arr,minIndex,i);
        }
        return arr;
    }
    public static void swap(int[] arr,int i,int j){
            int temp=arr[i];
            arr[i]=arr[j];
            arr[j]=temp;

    }