2015年11月26日 Java基础系列（七）正则表达式Regex

package com.demo.regex;

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

/**
 * @author Administrator
 *
 */
public class RegexMatches {
    public static void main(String[] args) {
        String line="This order was placed for QT3000! OK?";
        String pattern = "(.*)(\\d+)(.*)";
        
        Pattern p = Pattern.compile(pattern);//Pattern没有构造函数
        Matcher m = p.matcher(line);
        if(m.find()){
            System.out.println("Found value:"+m.group(0));
            System.out.println("Found value:"+m.group(1));
            System.out.println("Found value:"+m.group(2));
            System.out.println("Found value:"+m.group(3));
            System.out.println("Found value:"+m.group(4));
        }else{
            System.out.println("NO MATCH");
        }
        
        line.replaceAll("", "");
    }
}