java - complete a method that swaps the first and second half of an array of integers -

i keep getting out of bounds error whenever try run code. know wrong it? can't seem figure out.

public class swapper{      /**     method swaps first , second half of given array.     @param values array      */      public void swapfirstandsecondhalf(int[] values) {         // work here          int[] first = new int[values.length/2];         int[] second = new int[values.length/2];         for(int = 0; < values.length / 2; i++) {             second[i] = values[i];         }         (int j = values.length / 2; j < values.length; j++) {             first[j] = values[j];         }         for(int k = 0; k < values.length / 2; k++) {             values[k] = first[k];         }         for(int l = values.length / 2; l < values.length; l++) {             values[l] = second[l];         }     }      // method used check work     public int[] check(int[] values) {         swapfirstandsecondhalf(values);         return values;     } } 

int[] first = new int[values.length/2]; 

so indexes [0..values.length/2 - 1] valid first.

for (int j=values.length/2; j<values.length; j++) {     first[j] = values[j]; } 

so first value of j being values.length/2, it's out of bounds.

you need practice debugging, placing break point , tracing code executes.