[Java] - bubble sort

package array;

import java.util.Arrays;

public class BubbleSort {
    public static void main(String[] args) {
        // 난수 담긴 배열 생성
        int [] arr = new int[10];
        for (int i = 0; i<arr.length;i++){
            arr[i] = (int)(Math.random()*20);
        }
        System.out.println(Arrays.toString(arr));

        for(int i=0; i < arr.length-1; i++){
            boolean flag = false;

            for(int j=0; j < arr.length-1-i; j++){
                if(arr[j] > arr[j+1]){
                    int tmp = arr[j];
                    arr[j] = arr[j+1];
                    arr[j+1] = tmp;
                    flag = true;
                }
            }
            if(!flag) break;
        }
        System.out.println(Arrays.toString(arr));
    }
}