Write code to Concatenate all the passed strings
//package com.book2s; public class Main { public static void main(String[] argv) { String args = "book2s.com"; System.out.println(fastConcat(args)); }//w ww. j ava 2 s . c o m /** * Concatenates all the passed strings * @param args The strings to concatentate * @return the concatentated string */ public static String fastConcat(CharSequence... args) { StringBuilder buff = getStringBuilder(); for (CharSequence s : args) { if (s == null) continue; buff.append(s); } return buff.toString(); } /** * Acquires and truncates the current thread's StringBuilder. * @return A truncated string builder for use by the current thread. */ public static StringBuilder getStringBuilder() { return new StringBuilder(); } /** * Acquires and truncates the current thread's StringBuilder. * @param size the inited size of the stringbuilder * @return A truncated string builder for use by the current thread. */ public static StringBuilder getStringBuilder(int size) { return new StringBuilder(size); } }