java 动态数组之ArrayList与Iterator实现

package Bean;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;

public class TestCollection {
 
 
 public static void main(String[] args)
 {
  ArrayList array = new ArrayList();
  System.out.println("");
  int b = 0;
  while(true)
  {

   try {
    b = System.in.read();
   } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
   if(b == '\r' || b == '\n')
    break;
   else
   {
    int num = b - '0';
    array.add(new Integer(num));
    
   }
   
   int sum = 0;
   Iterator iterator  = array.iterator();
   while(iterator.hasNext())
   {
    Integer printByte = (Integer) iterator.next();
    sum += printByte.intValue();
   }
   System.out.println(sum);   
  }

 }

}