ints in ArrayList

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March 19th, 2002, 06:44 PM

phast

Junior Member

Join Date: Nov 2001

Posts: 2

Time spent in forums: < 1 sec
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ints in ArrayList

Hi,
I am retreiving some numbers from an HTML form, converting them to int and then storing them in an ArrayList.

I'm having trouble parsing the ArrayList to check if the numbers are less than 70. I can't cast the ArrayList datatype to an int for the purpose of comparing. I get a ClassCastException with this method, and any other things I try result in a "incompatible data type" complier error.

PHP Code:


		
			
for (int i = 0; i < scoreList.size(); i++) { 

                  out.println(scoreList.get(i));

                  String score = scoreList.get(i); 

                  int i_score = Integer.parseInt(score);

                  if (i_score < 70) {

                        out.println((String)scoreList.get(i));

                        out.println("insert some CA's");

                  }

edit: pay no attention to the "PHP:", it's java.. i promise.

Thanks
-jay

Any help is appreciated. Thanks

March 19th, 2002, 08:32 PM

Marky_Mark

Contributing User

Join Date: Sep 2001

Location: On a screen near you

Posts: 498

Time spent in forums: < 1 sec
Reputation Power: 12

Make sure you have the correct import for this
and i would use length over size when working with arrays

Code:



for (int i = 0; i < scoreList.length; i++) { 
                  
       int ij = Integer.valueOf(scoreList[i]).intValue();

         if(ij < max){          
        System.out.println(ij);
        }
                  
                  
   }

Mark

__________________
100 trillion calculations per nanosecond

April 1st, 2002, 09:57 AM

Nemi

Clueless llama

Join Date: Feb 2001

Location: Lincoln, NE. USA

Posts: 2,353

Time spent in forums: 2 Days 12 h 39 m 5 sec
Reputation Power: 116

I believe the reason you are getting a classCastException is because you are trying to put an Object type into a String:

Code:

for (int i = 0; i < scoreList.size(); i++) { 
                  out.println(scoreList.get(i));
                  String score = scoreList.get(i); //this returns a type Object
                  int i_score = Integer.parseInt(score);
                  if (i_score < 70) {
                        out.println((String)scoreList.get(i));
                        out.println("insert some CA's");
                  }

--------------------------
Should be :

for (int i = 0; i < scoreList.size(); i++) { 
                  out.println(scoreList.get(i));
                  String score = (String)scoreList.get(i); 
                  int i_score = Integer.parseInt(score);
                  if (i_score < 70) {
                        out.println((String)scoreList.get(i));
                        out.println("insert some CA's");
                  }

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