Write code to convert string to Lower Case
//package com.book2s; public class Main { public static void main(String[] argv) { String str = "book2s.com"; System.out.println(toLowerCase(str)); }/*from w w w . j a va 2s. c o m*/ public static String toLowerCase(String str) { StringBuffer buffer = new StringBuffer(str); for (int i = 0; i < buffer.length(); i++) { char c = buffer.charAt(i); buffer.setCharAt(i, Character.toLowerCase(c)); } return buffer.toString(); } }