任意从键盘输入一组数字，然后将这些数字按顺序排列

import java.io.*; 
class Test{ 
public static void main(String args[]) throws IOException 
{ 
int num[] = new int[20]; 
int i = 0; 
int temp = 0; 
int sum = 0; 
BufferedReader buf = new BufferedReader(new InputStreamReader(System.in)); 
while(true) 
{ 
temp = Integer.parseInt(buf.readLine()); 
if(temp != -1) 
{ 
num[i] = temp; 
i++; 
sum += temp; 
} 
else 
{ 
break; 
} 
} 

PoPo popo = new PoPo(num, i); 
popo.sort(); 
} 
}