testcollection.java

用java编写的一些初级代码

import java.util.*;
public class TestCollection { 
    public static void main(String args[]){ 
	int b=0; 
	ArrayList al=new ArrayList();
	System.out.println("enter num");
	while(true)
	{
	    try
	    {
		b=System.in.read();
	    }
	    catch(Exception e)
	    {	System.out.println(e.getMessage());}
	    if(b=='\r' ||b=='\n')
		break;
	    else
	    {
		int num=b-'0';
		al.add(new Integer(num));
	    }
	}
	int sum=0;
	Iterator itr=al.iterator();
	while(itr.hasNext())
	{
	    Integer intObj=(Integer)itr.next();
	    sum+=intObj.intValue();
	}
	System.out.println(sum);
    }
}