Java经典实例：使用正则表达式：测试模式详解编程语言

import java.util.regex.Pattern; 
 
/** 
 * Created by Frank 
 * 在Java中使用正则表达式：测试模式 
 */ 
public class RESimple { 
    public static void main(String[] args) { 
        String pattern = "^Q[^u]//d+//."; 
        String[] input = {"QA777. is the next flight. It is on time.", "Quack, Quack, Quack!"}; 
        Pattern p = Pattern.compile(pattern); 
        for (String s : input) { 
            /** 
             * 在字符串中匹配模式，从字符串的首字母开始，或者之前已经成功调用该方法，则从未能符合前面匹配的第一个字符开始 
             */ 
            boolean found = p.matcher(s).find(); 
            System.out.println("'" + pattern + "' " + (found ? " matches '" : "doesn't match '") + s + "'"); 
        } 
    } 
}

'^Q[^u]/d+/.'  matches 'QA777. is the next flight. It is on time.' 
'^Q[^u]/d+/.' doesn't match 'Quack, Quack, Quack!'