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Decorator.java

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abstract class Girl {

String description = "plain";

public String getDescription() {

return description;

}

}

class AmericanGirl extends Girl {

public AmericanGirl() {

description = " + AmericanGirl";

}

}

class ChineseGirl extends Girl {

public ChineseGirl() {

description = " + ChineseGirl";

}

}

abstract class GirlDecorator extends Girl {

public abstract String getDescription();

}

class GoldenHair extends GirlDecorator {

private Girl girl;

public GoldenHair(Girl g) {

girl = g;

}

@Override

public String getDescription() {

return girl.getDescription() + " + with golden hair";

}

}

class Tall extends GirlDecorator {

private Girl girl;

public Tall(Girl g) {

this.girl = g;

}

@Override

public String getDescription() {

return girl.getDescription() + " + is very tall";

}

}

public class Decorator {

public static void main(String[] args) {

Girl g1 = new AmericanGirl();

System.out.println(g1.getDescription());

Girl g2 = new GoldenHair(g1);

System.out.println(g2.getDescription());

Girl g3 = new Tall(g2);

System.out.println(g3.getDescription());

}

}