WordScrambler.java (2014 FRQ)

import java.util.Arrays;

class WordScrambler {
    private String[] scrambledWords;

    public WordScrambler(String[] wordArr) {
        scrambledWords = mixedWords(wordArr);
    }

    private String recombine(String word1, String word2) {
        int fhalf = word1.length() / 2, shalf = word2.length() / 2;
        return word1.substring(0, fhalf) + word2.substring(shalf);
    }

    public String[] mixedWords(String[] words) {
        String[] output = new String[words.length];
        for (int i = 0; i < words.length; i += 2) {
            output[i] = recombine(words[i], words[i + 1]);
            output[i + 1] = recombine(words[i + 1], words[i]);
        }
        return output;
    }
}

public class WordScramblerRunner {
    public static void main(String[] args) {
        String[] array = {"apple", "pear", "this", "cat"};
        WordScrambler one = new WordScrambler(array);
        System.out.println(Arrays.toString(one.mixedWords(array)));
    }
}