Generate Unique Id As String

import java.util.UUID;


 
public class UIDGenerator {

     
    public static String generateUID() {
	return UUID.randomUUID().toString(); 
    }
    
  
    public static String generateC16UID() {
	 
	String C36UUID = UUID.randomUUID().toString();  
	
	String C16 = C36UUID.replaceAll("-", "");
	
	return C16.substring(0, 16);
    }  
}