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Thread: Exception In Thread Main ArrayIndexOutOfBoundsException

  1. #1
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    Default Exception In Thread Main ArrayIndexOutOfBoundsException

    Can someone maybe help me with the following error. Exception in thread main java.lang.arrayindexoutofboundsexception : 3 at RowTrans.encrypt(Rowtrans.java:33)
    at RowTrans.main(Rowtrans.java :7)

    In my program I want to get a text. Put it in a matrix with 5 columns and determine the rows according to the length of the text. Then i want to change the column and row position so that the row gets the columns position and the column the row. Can anyone assist me on this error please.

    Here is my code

    import java.util.Scanner;
    03

    04
    public class ColTrans {
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    public static void main(String[] args)
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    {
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    String ori = "This is my horse";
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    String enc = encrypt(ori);
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    System.out.println(enc);
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    // String dec = decrypt(enc);
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    // System.out.println(dec);
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    }
    13

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    static String encrypt(String text)
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    {
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    String result = "";
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    text = text.toUpperCase();
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    int length = text.length();
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    int rows = length/5;
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    char [][] b =new char[rows][5];
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    char [][] c =new char[5][rows];
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    char [] d = new char[length];
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    if ((length % 5) != 0)
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    rows = rows + 1;
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    int k = 0;
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    for(int i = 0; i < rows; i++)
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    for(int j = 0; j < 5; j++)
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    {
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    if ( k > length )
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    b[i][j] = 'Z';
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    else
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    {
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    d[k] = text.charAt(k);
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    b[i][j] = d[k];
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    }
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    k++;
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    }
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    for(int i = 0; i < 5; i++)
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    for(int j = 0; j < rows; j++)
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    {
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    c[i][j] = b[j][i];
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    result = result + c[i][j];
    43
    }
    44
    return result;
    45
    }
    46
    }


  2. #2
    Senior Member PhHein's Avatar
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    Default Re: Exception In Thread Main ArrayIndexOutOfBoundsException

    repost your code with code tags, that is unredable.

  3. #3
    Super Moderator jps's Avatar
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    Default Re: Exception In Thread Main ArrayIndexOutOfBoundsException

    java.lang.arrayindexoutofboundsexception

    Somewhere the program is trying to access an element of an array that is out of bounds.
    Look at the error message for a hint to the line number and figure out why the code is trying to get elements that do not exist.
    (Either less than zero or larger than the last index)

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