package generics;

import java.util.*;

/**

* RUN:

* javac generics/FactoryConstraint.java && java generics.FactoryConstraint

* OUTPUT:

*

*/

public class FactoryConstraint {

public static void main(String[] args) {

new Foo2<Integer>(new IntegerFactory());

new Foo2<Widget>(new Widget.Factory());

}

}

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

interface FactoryI<T> {

T create();

}

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

class Foo2<T> {

private T x;

public <F extends FactoryI<T>> Foo2(F factory) {

x = factory.create();

}

}

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

class IntegerFactory implements FactoryI<Integer> {

public Integer create() {

return new Integer(0);

}

}

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

class Widget {

public static class Factory implements FactoryI<Widget> {

public Widget create() {

return new Widget();

}

}

}