Replace integers inside of an array

Question

Hi,
I'm currently trying to replace integers inside of a multidimensional array, but I don't know how to make it so that it doesn't skip them (if they've been changed, I assume). Here's an example, hopefully you understand, if not please let me know and I'll try to go further in depth.
public class Example {
     private int[][] replaced = new int[][] {
          {0, 1}, {1, 3}, {2, 4}, {3, 5}, {4, 6}, {5, 2}, {6, 0}
     public static void main(String[] var) {
          new Example().replace();
      * Should replace the integer inside of the first index of replaced with the second, without skipping any
     public void replace() {
          for (int a = 0; a < 6; a++) {
               if (a == replaced[a][0]) {
                    a = replaced[a][1];
                    System.out.println("replaced " + replaced[a][0] + " with " + replaced[a][1]);
}

Answer 1

sharkura wrote:
More specifically, your replace function is doing this ... if the value at a,0 is equal to the current array index a, set the array index a to the value at a,1.
This does not replace the value at a,0 with the value at a,1. With your specific data, it updates the loop index prematurely, so one or more values are skipped. Without running it, it may cause your loop to execute without termination. With some data, it will definitely do that.
This will make your loop behave very strangely.  It is almost never correct to modify a loop index variable inside the loop.
To repeat:
It is almost never correct to modify a loop index variable inside the loop.
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