冒泡排序

/**
 * 冒泡排序
 */
public class BubbleSort2{
    public static void main(String[] args) {
        int[] arr = {12, 23, 45, 67, 87, 3, 2, 1, 6};
        int temp = 0;
        for(int j=0; j<arr.length-1; j++){
            for(int i=0; i<arr.length-1-j; i++){
                if(arr[i]>arr[i+1]){
                    temp = arr[i+1];
                    arr[i+1] = arr[i];
                    arr[i] = temp;
                }
            }
        }
        StringBuilder sb = new StringBuilder();
        sb.append("[");
        for(int i=0; i<arr.length; i++){
            if(i == arr.length-1){
                sb.append(arr[i]).append("]");
            }else {
                sb.append(arr[i]).append(",");
            }
        }
        System.out.println(sb.toString());
    }

}