Write code to trim a string with while loop and Character.isWhitespace
//package com.book2s; public class Main { public static void main(String[] argv) { CharSequence s = "book2s.com"; System.out.println(trim(s)); }/*from w w w . j av a 2s . c om*/ public static CharSequence trim(CharSequence s) { if (s == null || s.length() == 0) { return s; } int start = 0; int end = s.length() - 1; while (start < end && Character.isWhitespace(s.charAt(start))) { start++; } while (end > start && Character.isWhitespace(s.charAt(end - 1))) { end--; } return s.subSequence(start, end); } }