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mangstadtmangstadt
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Use ServiceLoader class to obtain service instance
In the "main-app" module, the `HelloInterface` service instance, `HelloModules`, was just being treated like an ordinary class that was exported from the "hello.modules" module. The code was not treating the class as a service class. This is not a good example of how services are used. This commit makes use of the `ServiceLoader` class, which provides access to the `HelloInterface` instance as defined in the "hello.modules" module. This serves as a better example for how services are used.
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Lines changed: 6 additions & 3 deletions

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  • core-java-modules/core-java-9-jigsaw/src/simple-modules/main.app/com/baeldung/modules/main

‎core-java-modules/core-java-9-jigsaw/src/simple-modules/main.app/com/baeldung/modules/main/MainApp.java‎

Lines changed: 6 additions & 3 deletions
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package com.baeldung.modules.main;
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import com.baeldung.modules.hello.HelloInterface;
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import com.baeldung.modules.hello.HelloModules;
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import java.util.ServiceLoader;
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public class MainApp {
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public static void main(String[] args) {
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HelloModules.doSomething();
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HelloModules module = new HelloModules();
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module.sayHello();
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Iterable<HelloInterface> services = ServiceLoader.load(HelloInterface.class);
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HelloInterface service = services.iterator().next();
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service.sayHello();
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}
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}

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