Arrays类讲解。冒泡排序

int[] a = {1,2,3,456,453,12312,45};
        System.out.println(a);//[I@1b6d3586
        //打印数组元素//Arrays.toString(a)
        //System.out.println(Arrays.toString(a));
        //printArray(a);
        Arrays.sort(a);//数组进行排序：升序
        System.out.println(Arrays.toString(a));

int[] a = {1,2,45,6,3,8,345,54754,45};
        int[] sort = sort(a);
        System.out.println(Arrays.toString(sort));
    }
    //冒泡排序
    public static int[] sort(int[] array) {
        //临时变量
        int temp = 0;
        //外层循环，判断要走多少次;
        for (int i = 0; i < array.length; i++) {

            boolean flag = false;//通过flag标识位减少没有意义的比较

            //内层循环，比较判断两个数，如果第一个数比第二个大，则交换位置
            for (int j = 0; j < array.length-1-i; j++) {
                if (array[j+1]>array[j]){//降序，< 为升序
                    temp = array[j];
                    array[j] = array[j+1];
                    array[j+1] = temp;
                    flag = true;
                }
            }
            if (flag==false){
                break;
            }
        }
        return array;
java