java - Array Index out of bounds think there is a specfic line -

exception in thread "main" java.lang.arrayindexoutofboundsexception: 100 @ ham.main(ham.java:34)

line 34 on console says if (h[c] == 1)

i wrote code generate hamming code..i getting javaindexoutbounds exception..i gave absurdly large array sizes counter tht..still not working! array outbounds thou there plenty of space array

the line 27 might mistake...checking c

 import java.util.*;  public class ham { public static void main(string ar[]) {     scanner s = new scanner(system.in);     system.out.println("input no. of bits");     int n = s.nextint();     int a[] = new int[100]; // user's input     int h[] = new int[100]; // hamming code array     system.out.println("i/p data");     int = 1, j = 1, pb = 1;     (i = 1; < n + 1; i++)         a[i] = s.nextint();     = 1;      while (i < n + 1) {         if (j == pb) // if index parity bit leave         {             j++;             pb = pb * 2;         } else {             h[j] = a[i];             j++;             i++;         } // else copy data bits a[] h[]     }      int c = 0, counter = 0; // fill parity bits(k)     (int k = 1; k <= j; k = 2 * k) {         c = k;         while (c <= j) // 'j' position of last data bit in h[]         {             (c = k; c < (c + k); c++) {                 if (h[c] == 1)   // line 34                     counter++;             }             c = c + k + 1;         }         if (counter % 2 == 0)             h[k] = 0;         else             h[k] = 1;     }     system.out.println("hamming code is");     (i = 1; <= j; i++)         system.out.print(h[i] + " "); } 

}

the if (h[c] == 1) test causing exception.

your h array has fixed size of 100, maximum value of c seems depend on user's input, n. need figure out how dynamically determine array sizes, depending on user input.