moduleでのclass provide

モジュールでinterfaceへのclass provide
app sideのmodule-info.javaでuse app.SampleInterfaceでinterface宣言
provide sideのmodule-info.javaでprovides app.SampleInterface with lib.SampleImplでprovide

app\module-info.java

module App {
    exports app;
    uses app.SampleInterface;
}

app\app.App.java

package app;

import java.util.Iterator;
import java.util.ServiceLoader;

/**
 *
 * @author java
 */
public class App {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Iterator<SampleInterface> i = ServiceLoader.load(SampleInterface.class).iterator();
        while(i.hasNext()) {
            SampleInterface s = i.next();
            System.out.println(s.method());
        }
    }
    
}

app\app.SampleInterface.java

package app;

/**
 *
 * @author java
 */
public interface SampleInterface {
    public String method();
}

lib\module-info.java

module Lib {
    exports lib;
    requires App;
    provides app.SampleInterface with lib.SampleImpl;
}

lib\lib.SampleImpl.java

package lib;

import app.SampleInterface;

/**
 *
 * @author java
 */
public class SampleImpl implements SampleInterface{
    @Override
    public String method() {
        return "i am SampleImpl";
    }
}

実行結果

i am SampleImpl