Java tutorial
import java.io.*; public class Main { public static void main(String[] args) { StringWriter sw = new StringWriter(); CharSequence sq = "tutorial from java2s.com"; // append sequence sw.append(sq, 0, 5); System.out.println(sw.toString()); // append second sequence sw.append(sq, 6, 5); System.out.println(sw.toString()); } }