code: public static String unquote(String s)
      {
          if (s==null)
              return null;
          if (s.length()<2)
              return s;
  
          char first=s.charAt(0);
          char last=s.charAt(s.length()-1);
          if (first!=last || (first!='"' && first!='\''))
              return s;
          
          StringBuffer b=new StringBuffer(s.length()-2);
          synchronized(b)
          {
              boolean quote=false;
              for (int i=1;i<s.length()-1;i++)
              {
                  char c = s.charAt(i);
  
                  if (c=='\\' && !quote)
                  {
                      quote=true;
                      continue;
                  }
                  quote=false;
                  b.append(c);
              }
              
              return b.toString();
          }
      }
docs: Unquote a string.
  @param s The string to unquote.
  @return quoted string