41 lines
858 B
Java
41 lines
858 B
Java
//: generics/DogsAndRobots.java
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// No latent typing in Java
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import typeinfo.pets.*;
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import static net.mindview.util.Print.*;
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class PerformingDog extends Dog implements Performs {
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@Override
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public void speak() { print("Woof!"); }
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@Override
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public void sit() { print("Sitting"); }
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public void reproduce() {}
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}
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class Robot implements Performs {
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public void speak() { print("Click!"); }
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public void sit() { print("Clank!"); }
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public void oilChange() {}
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}
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class Communicate {
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public static <T extends Performs>
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void perform(T performer) {
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performer.speak();
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performer.sit();
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}
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}
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public class DogsAndRobots {
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public static void main(String[] args) {
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PerformingDog d = new PerformingDog();
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Robot r = new Robot();
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Communicate.perform(d);
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Communicate.perform(r);
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}
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} /* Output:
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Woof!
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Sitting
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Click!
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Clank!
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*///:~
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