Coins to form a sequence of alternating heads and tails - codility test using java

package com.codility.interview;

public class AlternateCoinSequence {

public static int flip(int ch) {
return (ch == 0) ? 1 : 0;
}

public static int getFlipWithStartingCharcter(int[] coinSeq, int expected) {
int flipCount = 0;
for (int i = 0; i < coinSeq.length; i++) {

if (coinSeq[i] != expected)
flipCount++;

expected = flip(expected);
}
return flipCount;
}

public static int minFlipToMakeStringAlternate(int[] coinSeq) {
return Math.min(getFlipWithStartingCharcter(coinSeq, 0), getFlipWithStartingCharcter(coinSeq, 1));
}

public static void main(String[] args) {
AlternateCoinSequence c = new AlternateCoinSequence();

int[] coinSeq = { 1, 1, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0, 1, 1 };
  //int[] coinSeq = { 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0 }; --7 min flips
  //int[] coinSeq = { 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1 }; --9 max flips


System.out.println("Number of min flips required to make coin seq are "+minFlipToMakeStringAlternate(coinSeq));

}

}