小编Les*_* YJ的帖子

import java.util.*;
import java.util.Random;

class ArraySorting {
public static void main(String[]args) {

    ArrayList<Integer> arr = new ArrayList<Integer>();

    Random generate = new Random();
    for (int nums = 0; nums < 20; nums++) {
      int randomnumbers = generate.nextInt(50);
      arr.add(randomnumbers);
    }

    System.out.println("First list of 20 generated numbers: ");
    System.out.println(arr);
    System.out.println("");

    int dupe = 0; 

    for (int n = 0; n < arr.size(); n++) {
        Integer check1 = arr.get(n); 

        for (int n2 = n+1; n2 < arr.size(); n2++) { 
            Integer check2 = arr.get(n2); 

            //remove …