Sorting the properties in java -

is there way sort properties object in java?

i have string groups properties , checks whether data available in map format.

please use example :

from link : http://www.java2s.com/tutorial/java/0140__collections/sortpropertieswhensaving.htm

import java.io.fileoutputstream; import java.util.collections; import java.util.enumeration; import java.util.properties; import java.util.vector;  public class main{   public static void main(string[] args) throws exception {     sortedproperties sp = new sortedproperties();     sp.put("b", "value b");     sp.put("c", "value c");     sp.put("a", "value a");     sp.put("d", "value d");     fileoutputstream fos = new fileoutputstream("sp.props");     sp.store(fos, "sorted props");   }  } class sortedproperties extends properties {   public enumeration keys() {      enumeration keysenum = super.keys();      vector<string> keylist = new vector<string>();      while(keysenum.hasmoreelements()){        keylist.add((string)keysenum.nextelement());      }      collections.sort(keylist);      return keylist.elements();   }  }