自顶- -

每人么。。。。

灌到Set里然后再取出来

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public class test {
/**
* @param args
* @throws IOException
* @throws NumberFormatException
*/
public static void main(String[] args) throws NumberFormatException, IOException {
// TODO Auto-generated method stub
int a[]= new int[20];
int m = 0;
int j=0;
BufferedReader reader=new BufferedReader(new InputStreamReader(System.in));
System.out.println("请输入20个整数,每行一个数:");
for(;m<20;m++){
a[m]= Integer.parseInt(reader.readLine());
}
List<Integer> numList = new ArrayList<Integer>();
for (int i =0;i<a.length;i++ ){
if(!numList.contains(a[i])){
numList.add(a[i]);
}else{
j++;
}
}
int sum=20-j;
Iterator<Integer> inter = numList.iterator();
while(inter.hasNext())
System.out.print(inter.next());
System.out.println("共有元素"+sum+"个");
}
}

有意思