Write code to convert a String to Sentence Case
//package com.book2s; import java.util.HashSet; public class Main { public static void main(String[] argv) { String str = "this is a test"; System.out.println(toSentenceCase(str)); }//from ww w .j a va 2 s .c o m public static String toSentenceCase(String str) { if (!empty(str)) { String f = str.charAt(0) + ""; //First Letter HashSet ups = new HashSet(); String n = ""; //new String for (int i = 0; i < str.length(); i++) if (Character.isUpperCase(str.charAt(i))) ups.add(i); str = f.toUpperCase() + str.substring(1).toLowerCase(); for (int i = 0; i < str.length(); i++) { char c = str.charAt(i); if (ups.contains(i)) c = Character.toUpperCase(c); n += c; } return n; } return str; } public static boolean empty(String str) { return str == null || str.length() == 0; } }