PrototypeExample_GFG

// A Java program to demonstrate working of
// Prototype Design Pattern with example
// of a ColorStore class to store existing objects.

import java.util.HashMap;
import java.util.Map;


abstract class Color implements Cloneable
{

    protected String colorName;

    abstract void addColor();

    public Object clone()
    {
        Object clone = null;
        try
        {
            clone = super.clone();
        }
        catch (CloneNotSupportedException e)
        {
            e.printStackTrace();
        }
        return clone;
    }
}

class blueColor extends Color
{
    public blueColor()
    {
        this.colorName = "blue";
    }

    @Override
    void addColor()
    {
        System.out.println("Blue color added");
    }

}

class blackColor extends Color{

    public blackColor()
    {
        this.colorName = "black";
    }

    @Override
    void addColor()
    {
        System.out.println("Black color added");
    }
}

class ColorStore {

    private static Map<String, Color> colorMap = new HashMap<String, Color>();

    static
    {
        colorMap.put("blue", new blueColor());
        colorMap.put("black", new blackColor());
    }

    public static Color getColor(String colorName)
    {
        return (Color) colorMap.get(colorName).clone();
    }
}


// Driver class
class Prototype
{
    public static void main (String[] args)
    {
        ColorStore.getColor("blue").addColor();
        ColorStore.getColor("black").addColor();
        ColorStore.getColor("black").addColor();
        ColorStore.getColor("blue").addColor();
    }
}