package generics;

import java.util.*;

import java.lang.reflect.*;

/**

* RUN:

* javac generics/BasicBounds.java && java generics.BasicBounds

* OUTPUT:

*

*/

public class BasicBounds {

public static void main(String[] args) {

Solid<Bounded> solid = new Solid<Bounded>(new Bounded());

solid.color();

solid.getY();

solid.weight();

}

}

// --------------------------------------------------------------------

interface HasColor { java.awt.Color getColor(); }

class Colored<T extends HasColor> {

T item;

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

T getItem() { return item; }

// HERE WE INVOKE method of concreet type:

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

}

// --------------------------------------------------------------------

class Dimension { public int x, y, z; }

// --------------------------------------------------------------------

//

// error: interface expected here

// class ColoredDimension<T extends HasColor & Dimension> {}

// ^

//

// class ColoredDimension<T extends HasColor & Dimension> {}

class ColoredDimension<T extends Dimension & HasColor> {

T item;

ColoredDimension(T iten) { this.item = item; }

T getItem() { return item; }

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

int getX() { return item.x; }

int getY() { return item.y; }

int getZ() { return item.z; }

}

// --------------------------------------------------------------------

interface Weight { int weight(); }

// --------------------------------------------------------------------

class Solid<T extends Dimension & HasColor & Weight> {

T item;

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

T getItem() { return item; }

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

int getX() { return item.x; }

int getY() { return item.y; }

int getZ() { return item.z; }

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

}

// --------------------------------------------------------------------

class Bounded extends Dimension implements HasColor, Weight {

public java.awt.Color getColor() { return null; }

public int weight() { return 0; }

}