java/Generic/src/GenericFactory.java at master · hsjiang/java

40 lines (33 loc) · 732 Bytes

/**
 * Created by riven_chris on 15/7/13.
 * 显式的工厂
 */
public class GenericFactory {

    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> {
    @Override
    public Integer create() {
        return new Integer(0);
    }
}

class Widget {
    public static class Factory implements FactoryI<Widget> {
        @Override
        public Widget create() {
            return new Widget();
        }
    }
}

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