OnJava8-Examples/generics/InheritBounds.java at master · CSapprenticeWT/OnJava8-Examples · GitHub

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// generics/InheritBounds.java

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

class HoldItem<T> {

T item;

HoldItem(T item) { this.item = item; }

T getItem() { return item; }

}

class WithColor2<T extends HasColor>

extends HoldItem<T> {

WithColor2(T item) { super(item); }

java.awt.Color color() { return item.getColor(); }

}

class WithColorCoord2<T extends Coord & HasColor>

extends WithColor2<T> {

WithColorCoord2(T item) { super(item); }

int getX() { return item.x; }

int getY() { return item.y; }

int getZ() { return item.z; }

}

class Solid2<T extends Coord & HasColor & Weight>

extends WithColorCoord2<T> {

Solid2(T item) { super(item); }

int weight() { return item.weight(); }

}

public class InheritBounds {

public static void main(String[] args) {

Solid2<Bounded> solid2 =

new Solid2<>(new Bounded());

solid2.color();

solid2.getY();

solid2.weight();

}