OJ 输入n个整数，输出其中最小的k个

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.Scanner;

public class Main {

//输入n个整数，输出其中最小的k个

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

int numcount = sc.nextInt();

int mincount = sc.nextInt();

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

for (int i = 0; i < numcount; i++) {

list.add(sc.nextInt());

}

sc.close();

Collections.sort(list, new Comparator<Integer>() {

@Override

public int compare(Integer o1, Integer o2) {

// TODO Auto-generated method stub

return o1.compareTo(o2);

}

});

for (int i = 0; i < mincount; i++) {

System.out.print(list.get(i));//注意最后不能加空格

if(i!=mincount-1){

System.out.print(" ");

}

}

}

}