Change the value of the object's variable using decorator pattern in java?

I have this program that uses Builder Pattern to build an ID Object. I am not sure if the implementation of Builder Pattern is correct. But, this program can create an ID Object. Once the Object is created, I would like to implement Decorator Pattern to add functionalities to my object.

Here is my ID class,

public class ID implements IID{
int width;
int height;
String name;
String idnumber;
boolean border = false;
String borderColor;
public int getWidth(){return this.width;}
public int getHeight(){return this.height;}
public String getName(){return this.name;}
public String getIDNumber(){return this.idnumber;}
public boolean isBordered(){return border;}
public String getBorderColor(){return borderColor;}
@Override
public void addBorder(){
    this.border = true;
}
}

The boolean border, String borderColor, isBordered(), getBorderColor() and addBorder() is for Decorator Pattern.

Here is the Interface ID,

public interface IID {
void addBorder();
}

Here is the Decorator,

public abstract class IDDecorator implements IID{
protected ID decoratedID;
public IDDecorator(ID decoratedID){
    this.decoratedID = decoratedID;
}
public void addBorder(){
    decoratedID.addBorder();
} 
}

Here is the Concrete Decorator,

public class GrayIDDecorator extends IDDecorator{
public GrayIDDecorator(ID decoratedID){
    super(decoratedID);
}
@Override
public void addBorder(){
    decoratedID.addBorder();
    setGrayBorder(decoratedID);
}
private void setGrayBorder(ID decoratedID){
    decoratedID.borderColor="Gray";
}
}

I also like to know what is the use of super() in this concrete decorator. What is super()?

Here is the main class,

...
public static void main(String[] args) {
    ...
   IDBuilderDirector idd = new IDBuilderDirector();
    ...
   ID id = idd.construct(roleD, idnumber, fname, lname);
    ...
   IID grayID = new GrayIDDecorator(id);
   id.addBorder();
   if(id.isBordered()){
       System.out.println("Border: "+id.getBorderColor());
   }else{
       System.out.println("Border: None");
   }
   }

The IDBuilderDirector and related methods is for Builder Pattern.

In the main class, I used GrayIDDecorator. After the execution of the program, I have now the ID with border. But why I can't change the value of borderColor of the ID? If I call id.getBorderColor(), it will return null.

Also, I would like to know if implementation of Decorator pattern here in my program is correct.

This is the link that I am following regarding to Decorator Pattern. http://ift.tt/1CXb1Gu