Write code to do array Concatenate
//package com.book2s; public class Main { public static void main(String[] argv) { String[] f = new String[] { "1", "abc", "level", null, "book2s.com", "asdf 123" }; String[] s = new String[] { "1", "abc", "level", null, "book2s.com", "asdf 123" }; System.out.println(java.util.Arrays .toString(arrayConcatenate(f, s))); }//from ww w . jav a 2 s . co m public static String[] arrayConcatenate(final String[] f, final String[] s) { final int fLen = (f == null ? 0 : f.length); final int sLen = (s == null ? 0 : s.length); final int len = fLen + sLen; final String[] ret = new String[len]; if (fLen > 0) { System.arraycopy(f, 0, ret, 0, fLen); if (sLen > 0) { System.arraycopy(s, 0, ret, fLen, sLen); } } else if (sLen > 0) { System.arraycopy(s, 0, ret, 0, sLen); } return ret; } }