Solved

scope of varibles & conversion

Posted on 2009-04-06
4
252 Views
Last Modified: 2012-05-06
Hi All,
I have a variable as shown below:
String curVal=request.getParameter("curVal");
// values are like -> only 4 (or)  only 4, 5 (or)  only  4,  5,  6
so now I want to store this values in array, so lets think values in "curVal -> 4,  5,  6"
 int items[] = new int[4];
 java.util.StringTokenizer st = null;
   if(curVal.length() > 0)
   {
      st = new java.util.StringTokenizer(curVal,",");
   }
        int j;
       for(j=0;j<4;j++)
       {
          while(st.hasMoreTokens())
             {
                  items[j]= Integer.parseInt(st.nextToken());
                  System.out.println("array :"+items[j]);
             }
       }
            // now I am expecting  4, 5,6,0 in array in the below statements, but I am getting 6,0,0,0 why?
            System.out.println("array 0:"+items[0]);
            System.out.println("array 1:"+items[1]);
            System.out.println("array 2:"+items[2]);
            System.out.println("array 3:"+items[3]);
%>

Thanks in advance.
0
Comment
Question by:prk_usa
  • 4
4 Comments
 
LVL 12

Expert Comment

by:basav_com
ID: 24079354
0
 
LVL 12

Expert Comment

by:basav_com
ID: 24079500
Here you messed up the code.

                   for(j=0;j<4;j++)
                   {
                      while(st.hasMoreTokens())
                         {
                              items[j]= Integer.parseInt(st.nextToken());
                              System.out.println("array :"+items[j]);
                         }
                   }
0
 
LVL 12

Accepted Solution

by:
basav_com earned 500 total points
ID: 24079548
Take a look at this example:

output:
array :4
array :5
array :6
array 0:4
array 1:5
array 2:6
array 3:0
public class SampleStringTest {

	public static void main(String args[]){

		//String curVal=request.getParameter("curVal");

		String curVal = "4,5,6";

        //		 values are like -> only 4 (or)  only 4, 5 (or)  only  4,  5,  6

		//so now I want to store this values in array, so lets think values in "curVal -> 4,  5,  6"

		 int items[] = new int[4];

		 java.util.StringTokenizer st = null;

		   if(curVal.length() > 0)

		   {

		      st = new java.util.StringTokenizer(curVal,",");

		   }

		        int j=0;
 

		          while(st.hasMoreTokens())

		             {

		                  items[j]= Integer.parseInt(st.nextToken());

		                  System.out.println("array :"+items[j]);

		                  j++;

		             }

		

		            // now I am expecting  4, 5,6,0 in array in the below statements, but I am getting 6,0,0,0 why?

		            System.out.println("array 0:"+items[0]);

		            System.out.println("array 1:"+items[1]);

		            System.out.println("array 2:"+items[2]);

		            System.out.println("array 3:"+items[3]); 

	}

}

Open in new window

0
 
LVL 12

Expert Comment

by:basav_com
ID: 24079601
Your code is messed up because you are looping again using the for loop.  You have alread used while(st.hasMoreTokens) to loop thru all the tokens and you actually stored everything in the
items[0] element only.
  while(st.hasMoreTokens())
                         {
                              items[j]= Integer.parseInt(st.nextToken());
                              System.out.println("array :"+items[j]);    ---------------> Print j also here. Then you will understand.
                                                     
                                              }

And then again looped the array again using for loop.


So look at my code, I simply removed the for loop and stored the elements in items[0] to items[2] using the while loop and by incrementing 'j' each time.

Ask me more if you don't understand the explanation :)
0

Featured Post

Do You Know the 4 Main Threat Actor Types?

Do you know the main threat actor types? Most attackers fall into one of four categories, each with their own favored tactics, techniques, and procedures.

Join & Write a Comment

Suggested Solutions

Find out what Office 365 Transport Rules are, how they work and their limitations managing Office 365 signatures.
In this step by step tutorial with screenshots, we will show you HOW TO: Enable SSH Remote Access on a VMware vSphere Hypervisor 6.5 (ESXi 6.5). This is important if you need to enable SSH remote access for additional troubleshooting of the ESXi hos…
This video discusses moving either the default database or any database to a new volume.
This tutorial demonstrates a quick way of adding group price to multiple Magento products.

707 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now