冒泡排序

冒泡排序

public class BubbleSort {
    public static void main(String[] args) {
        int[] arr = {1,2,5,4,-1,6,-2};
        System.out.println("排序前");
		System.out.println(Arrays.toString(arr));
        //测试冒泡排序
        bubbleSort(arr);
        System.out.println("排序后");
        System.out.println(Arrays.toString(arr));
    }

    public static void bubbleSort(int[] arr){
        int temp = 0;
        boolean flag = false;
        for (int i=0;i<arr.length-1;i++){
            for (int j=0;j<arr.length-1-i;j++){
                flag = true;
                if (arr[j]>arr[j+1]){
                    temp = arr[j];
                    arr[j] = arr[j+1];
                    arr[j+1] = temp;
                }
            }
            if (!flag){
                break;
            }else {
                flag = false;
            }
        }
    }
}