Write code to do safe substring, without exception
//package com.book2s; public class Main { public static void main(String[] argv) { String str = "book2s.com"; int length = 2; System.out.println(substr(str, length)); }//from w ww. ja va 2 s . co m public static String substr(String str, int length) { if (str == null) { return str; } if (length < str.length()) { return str.substring(0, length); } return str; } }