ServiceLoader 找不到我的实现

Question

I'm trying to use ServiceLoader with modules system, the same way as shown in the Deploying service providers as modules header in the documentation here - click

I have the following project:

module tester.client

package tester.client;

import tester.common.Showable;

import java.util.ServiceLoader;

public class Main {

    public static void main(String[] args) {
        ServiceLoader<Showable> loader = ServiceLoader.load(Showable.class);
        loader.findFirst().orElseThrow(); //throws Exception
    }

}

module-info.java

import tester.common.Showable;

module tester.client {
    requires tester.common;
    uses Showable;
}

module tester.common

package tester.common;

public interface Showable {
    void show();
}

module-info.java

module tester.common {
    exports tester.common;
}

module tester.gui

package tester.gui;

import tester.common.Showable;

public class Window implements Showable {
    @Override
    public void show() {

    }
}

module-info.java

module tester.gui {
    requires tester.common;
    provides tester.common.Showable with tester.gui.Window;
}

THE PROBLEM:

ServiceLoader doesn't load my implementation.

• tester.client uses Showable
• tester.common exports Showable
• tester.gui provides Showable with Window

Answer 1

It turned out the problem is IDE-specific. As my IDE (Intellij IDEA) has its own additional modules system, I needed to add tester.gui module as a dependency of tester.client module.

Solution provided by @samabcde