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  1. import java.util.*;
  2. import java.util.regex.*;
  3. import java.lang.*;
  4.  
  5. class Main {
  6.     public static void main (String[] args) throws java.lang.Exception {
  7.  
  8.         String input= "$.store.book[Random(1,9)].title";
  9.         System.out.println("Input: "+ input);
  10.         Pattern p = Pattern.compile("(?<=\\[)Random\\((\\d+),(\\d+)\\)(?=\\])");
  11.         Matcher m = p.matcher(input);
  12.         String output = input;
  13.         if(m.find()) {
  14.             int min = Integer.valueOf(m.group(1));
  15.             int max = Integer.valueOf(m.group(2));
  16.             int randomNumber = min + (int)(Math.random() * ((max - min) + 1));
  17.             output = output.substring(0, m.start())+ randomNumber + output.substring(m.end());
  18.         }
  19.         System.out.println("Output: "+ output );
  20.  
  21.     }
  22. }
Success #stdin #stdout 0.06s 380224KB
comments (?)
stdin 
Standard input is empty
stdout 
Input: $.store.book[Random(1,9)].title
Output: $.store.book[6].title
https://ideone.com/0tXFNu
language:
Java (12.0.1)
created:
12 years ago
visibility:
secret

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