Collection 与iterator接口

2022-07-15 80酷酷网 80kuku.com

　　import java.util.*;
/**
* Collection 与iterator接口
*
*
**/
public class TestCollection
{
  public static void main(String args[])
  {
     ArrayList v = new ArrayList();
    int b = 0;
    System.out.println("please input the number:");
    while(true)
    {
    try
    {
      b = System.in.read();
    }
    catch(Exception e)
    {
        e.printStackTrace();
    }
    if(b=='\r' || b=='\n')
    {
      break;
    }
    else
    {
      int num = b -'0';
      v.add(new Integer(num));
    }
    }
    int sum = 0;
    Iterator e = v.iterator();
    while(e.hasNext())
    {
      Integer intObj = (Integer)e.next();
      sum += intObj.intValue();
    }
    System.out.println(sum);    }
}