45 lines
1.2 KiB
Java
45 lines
1.2 KiB
Java
// generics/DogsAndRobotMethodReferences.java
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// (c)2016 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
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// "Assisted Latent Typing"
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import typeinfo.pets.*;
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import java.util.function.*;
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class PerformingDog_ extends Dog {
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public void speak() { System.out.println("Woof!"); }
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public void sit() { System.out.println("Sitting"); }
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public void reproduce() {}
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}
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class Robot_ {
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public void speak() { System.out.println("Click!"); }
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public void sit() { System.out.println("Clank!"); }
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public void oilChange() {}
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}
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class Communicate_ {
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public static <P> void perform(P performer,
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Consumer<P> action1, Consumer<P> action2) {
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action1.accept(performer);
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action2.accept(performer);
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}
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}
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public class DogsAndRobotMethodReferences {
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public static void main(String[] args) {
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Communicate_.perform(new PerformingDog_(),
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PerformingDog_::speak, PerformingDog_::sit);
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Communicate_.perform(new Robot_(),
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Robot_::speak, Robot_::sit);
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Communicate_.perform(new Mime(),
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Mime::walkAgainstTheWind, Mime::pushInvisibleWalls);
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}
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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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