Java tutorial
//package com.java2s; import java.util.Arrays; public class Main { public static <T> T[] concat(T[] first, T[] second) { if (first == null && second == null) { return null; } else if (first == null) { return Arrays.copyOf(second, second.length); } else if (second == null) { return Arrays.copyOf(first, first.length); } else { T[] result = Arrays.copyOf(first, first.length + second.length); System.arraycopy(second, 0, result, first.length, second.length); return result; } } }