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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6. import java.util.regex.*;
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		 ArrayList<String> fruits_arr = new ArrayList<String>();
  13.             fruits_arr.add("Banana");
  14.             fruits_arr.add("Orange");
  15.             fruits_arr.add("Apple");
  16.             fruits_arr.add("Grape");
  17.         String[] fruits = fruits_arr.toArray(new String[0]);
  18.         String s = "My most favorite fruit is [0], but I also like [1] and [3]";
  19. 		StringBuffer result = new StringBuffer();
  20. 		Matcher m = Pattern.compile("\\[(\\d+)\\]").matcher(s);
  21. 		while (m.find()) {
  22.     		int num = Integer.parseInt(m.group(1));
  23.     		String replacement = "";
  24.     		if (num < fruits.length) { 
  25.     		       replacement =fruits[num];
  26.     		} else {
  27.     			replacement = m.group();
  28.     		}
  29. 		    m.appendReplacement(result, replacement);
  30. 		}
  31. 		m.appendTail(result);
  32. 		System.out.println(result.toString());
  33.  
  34. 	}
  35. }
Success #stdin #stdout 0.1s 320512KB
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Standard input is empty
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My most favorite fruit is Banana, but I also like Orange and Grape
https://ideone.com/LAaDoB
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
secret

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