java常用工具类例子

package test;import java.text.MessageFormat;import java.util.ResourceBundle;import java.util.regex.Matcher;import java.util.regex.Pattern;public class TestUtil {public static void main(String[] args) {Pattern p = Pattern.compile("list_\\d+_start");Matcher m = p.matcher("list_01_start");System.out.println(m.matches());MessageFormat mf = new MessageFormat("{0}がNULLなので、{1}が常了する。");String mfStr = mf.format(new Object[]{"引数","理"});System.out.println(mfStr);ResourceBundle rb = ResourceBundle.getBundle("TestResource");String message = rb.getString("ErrorMessage_001");System.out.println(message);}}

TestResource.properties位于src目录下。其内容为：
ErrorMessage_001 = message001