1 /*
   2  * decode the URL.  Borrowed code.
   3  */
   4 
   5 import java.net.*;
   6 import java.io.*;
   7 
   8 class URLDecoder {
   9    private URLDecoder() {}
  10 
  11    public static String decode(String s) {
  12       ByteArrayOutputStream out = new ByteArrayOutputStream(s.length());
  13       for (int count = 0; count < s.length(); count++) {
  14           if(s.charAt(count) == '%') {
  15             count++;          
  16             int a = Character.digit(s.charAt(count++),16);
  17             a = a<<4;
  18             int b = Character.digit(s.charAt(count),16);
  19             out.write(a+b);         
  20          } else {
  21             if (s.charAt(count) == '+')  {
  22                out.write(' ');
  23             } else {
  24                out.write(s.charAt(count));
  25             }     
  26          }
  27       }
  28    
  29       return (out.toString());   
  30    }
  31 }
  32 
  33