Copying specific elements of array to another array

Question

I am trying to copy the Right portion of frame data. The image below could be useful. Data is in single array form.

I want to get single array right column of data frame. I am getting "Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1000". I am not sure what's wrong.

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1000

 public static void main(String args[]) {
    int height=10;
    int width = 100;
    int data[]= new int [height*width];
    int multipiler=0;
    int counter =1;
    int hwAssistWidth=5;
    int hwData[] = new int[hwAssistWidth*height];
    int countTheFrame = 0;
    int countTheFrame1 = 0;
    int sourceArray;

    for(int i=0; i<hwAssistWidth*height; i++){
            sourceArray = ((width-hwAssistWidth)+width*multipiler)+counter++;
            hwData[i] = data[sourceArray];


          if (counter==hwAssistWidth+1){
              counter =1;
              multipiler++;
              if(multipiler==height){
                  break;

              }

          }
    }

}

@MenaiAlaEddine, Thank you for comment. could you please share the solution approach. — ZeSamPam, Sep 08 '17 at 18:19

score 0 · Accepted Answer · answered Sep 08 '17 at 18:22

0

The line

sourceArray = ((width-hwAssistWidth)+width*multipiler)+counter++;

sets the value of sourceArray to 1000 on the final iteration of the for loop. You then try to access element 1000 of the data array

hwData[i] = data[sourceArray];

However the data array only has 1000 elements

int height=10;
int width = 100;
int data[]= new int [height*width];

So the largest index is only 999, which is why you get the ArrayIndexOutOfBounds Exception. Fix your loop so that the value of sourceArray is never greater than 999.

answered Sep 08 '17 at 18:22

Joshua Newhouse

151
5

Thank you @JoshuaNewHouse. it worked – ZeSamPam Sep 08 '17 at 18:37
No problem. If this answers your question then you should mark it as answered. – Joshua Newhouse Sep 08 '17 at 19:16

Copying specific elements of array to another array

1 Answers1