Java示例以大写形式创建每个单词的第一个字母

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
   public static void main(String[] args) {
      String str = "this is a java test";
      System.out.println(str);
      StringBuffer stringbf = new StringBuffer();
      Matcher m = Pattern.compile(
         "([a-z])([a-z]*)", Pattern.CASE_INSENSITIVE).matcher(str);

      while (m.find()) {
         m.appendReplacement(
            stringbf, m.group(1).toUpperCase() + m.group(2).toLowerCase());
      }
      System.out.println(m.appendTail(stringbf).toString());
   }
}