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  1. import java.io.*;
  2. import java.util.*;
  3. import java.util.regex.*;
  4.  
  5. class Main
  6. {
  7.   static List<Pattern> patternList;
  8.  
  9.   static List<Pattern> getPatterns()
  10.   {
  11.     if (patternList == null)
  12.     {
  13.       String[] regexes = { "(a(?:b|c)a)", "((?:a|b)ba)", "(ab(?:a|c))" };
  14.       patternList = new ArrayList<Pattern>();
  15.       for (String rgx : regexes)
  16.       {
  17.         patternList.add(Pattern.compile(rgx));
  18.       }
  19.     }
  20.     return patternList;
  21.   }
  22.  
  23.  
  24.   public static void main (String[] args) throws Exception
  25.   {
  26.     Matcher m = Pattern.compile("dummy").matcher("dummy");
  27.     BufferedReader r = new BufferedReader (new InputStreamReader (System.in));
  28.     String s;
  29.     while ((s = r.readLine()) != null)
  30.     {
  31.       System.out.printf("%nInput: '%s'%n", s);
  32.       for (Pattern p : getPatterns())
  33.       {
  34.         m.reset(s).usePattern(p);
  35.         System.out.printf("%s : %b%n", p.pattern(), m.matches());
  36.       } 
  37.     }
  38.   }
  39. }
Success #stdin #stdout 0.07s 380160KB
comments (?)
stdin 
aba
abc
stdout 
Input: 'aba'
(a(?:b|c)a) : true
((?:a|b)ba) : true
(ab(?:a|c)) : true

Input: 'abc'
(a(?:b|c)a) : false
((?:a|b)ba) : false
(ab(?:a|c)) : true
https://ideone.com/icjxW9
language:
Java (12.0.1)
created:
11 years ago
visibility:
public

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