import java.util.*; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); List<Integer> l=new ArrayList<Integer>(); while(in.hasNextInt()){ l.add(in.nextInt()); } Collections.sort(l); for(int i=0;i<l.size()-1;i++){ System.out.print(l.get(i)+" "); } System.out.print(l.get(l.size()-1)); } }