guice

1

package  jp.co.wqf;

public   interface  DrawService  ... {
    public void draw();
}

2

package  jp.co.wqf;

public   class  DrawServiceImpl  implements  DrawService  ... {

    public void draw() ...{
        System.out.println("Circle");
    }

}

3

package  jp.co.wqf;

public   interface  PlayService  ... {
    public void play();
}

4

package  jp.co.wqf;

public   class  PlayServiceImpl  implements  PlayService  ... {

    public void play() ...{
        System.out.println("Piano");
    }

}

5

package  jp.co.wqf;

import  com.google.inject.Inject;

public   class  Client  ... {
    private DrawService drawService;
    private PlayService playService;
    private String str;
    @Inject
    public void injectDrawService(DrawService drawService)...{
        this.drawService = drawService;
    }
    @Inject
    public void injectPlayService(PlayService playService)...{
        this.playService = playService;
    }
    @Inject
    public void injectString(String str)...{
        this.str = str;
    }
    public void doAll()...{
        this.drawService.draw();
        this.playService.play();
        System.out.println(str);
    }
}

6

package  jp.co.wqf;

import  com.google.inject.AbstractModule;
import  com.google.inject.Scopes;

public   class  MyModule  extends  AbstractModule  ... {

    public void configure() ...{
        bind(DrawService.class).to(DrawServiceImpl.class).in(Scopes.SINGLETON);
        bind(PlayService.class).to(PlayServiceImpl.class).in(Scopes.SINGLETON);
        bind(String.class).toInstance("hello");
    }

}

7

package  jp.co.wqf;

import  org.junit.AfterClass;
import  org.junit.BeforeClass;
import  org.junit.Test;

import  com.google.inject.Guice;
import  com.google.inject.Injector;

public   class  ClientTest  ... {

    @BeforeClass
    public static void setUpBeforeClass() throws Exception ...{
    }

    @AfterClass
    public static void tearDownAfterClass() throws Exception ...{
    }

    @Test
    public void testPrintStr() ...{
        Injector injector = Guice.createInjector(new MyModule());
        Client client = injector.getInstance(Client.class);
        client.doAll();
    }

}