三个基本排序

简单冒泡排序，并且简单优化，减少遍历。

public class Maopao {
    public static void main(String[] args) {
        int[] arr = {0,2,3,5,6,8,9,1,4,7};
        test(arr);
        for (int i = 0; i < arr.length; i++) {
            System.out.print(arr[i] +" ");
        }
    }

    public static void test(int[] arr) {
        for (int j = 0; j  arr[i + 1]) {
                    a = false;
                    int temp = arr[i];
                    arr[i] = arr[i + 1];
                    arr[i + 1] = temp;
                }
            }
            //减少遍历次数 没有交换就跳出循环
            if (a) break;

            for (int i = 0; i < arr.length; i++) {
                System.out.print(arr[i] +" ");
            }
            System.out.println();
        }
    }
}

public class ChaRu {
    public static void main(String[] args) {
        int[] arr = {8,5,0,1,4,9,2,3,6,7};
        test(arr);
        for (int i = 0; i < arr.length; i++) {
            System.out.print(arr[i] +" ");
        }
    }

    public static void test(int[] arr) {
        for (int i = 0; i < arr.length; i++) {
            int temp = arr[i];
            int j = i - 1;
            while (j>= 0 && temp < arr[j]){
                arr[j+1] = arr[j];
                j--;
            }
            arr[j+1] = temp;
            for (int a = 0; a < arr.length; a++) {
                System.out.print(arr[a] +" ");
            }
            System.out.println();
        }
    }
}

public class XuanZe {
    public static void main(String[] args) {
        int[] arr = {8, 5, 0, 1, 4, 9, 2, 3, 6, 7};
        test(arr);
        for (int i = 0; i < arr.length; i++) {
            System.out.print(arr[i] + " ");
        }
    }

    public static void test(int[] arr) {
        for (int i = 0; i < arr.length-1; i++) {
            int min = arr[i],pos = i;
            for (int j = i + 1; j < arr.length; j++) {
                if (arr[j] < min){
                    min = arr[j];
                    pos = j;
                }
            }
            int temp = arr[i];
            arr[i] = arr[pos];
            arr[pos] = temp;
        }
    }
}