package test; import java.util.regex.Matcher; import java.util.regex.Pattern; public class DaXie { public static void main(String[] args) { String str = "i am a boy"; StringBuilder sBuilder = new StringBuilder(); Pattern pattern = Pattern.compile("^[a-zA-Z]+|\\S[a-zA-Z]*"); Matcher matcher = pattern.matcher(str); String tempString = null; while(matcher.find()) { tempString = matcher.group(); System.out.println(tempString); tempString = (tempString.charAt(0)+"").toUpperCase()+tempString.substring(1,tempString.length()); sBuilder.append(tempString).append(" "); } System.out.println(sBuilder.toString()); } }