/* Given an array of ints, return true if the array contains a 2 next to * a 2 or a 4 next to a 4, but not both. */ public boolean either24(int[] nums) { boolean has22 = false; boolean has44 = false; for(int i = 0; i < nums.length - 1; i++) { if(nums[i] == 2 && nums[i+1] == 2) has22 = true; if(nums[i] == 4 && nums[i+1] == 4) has44 = true; } return has22 != has44; }