Abstract factory pattern

Package structure as shown in the figure

ps: it's a little abstract to understand

1. Function interface PlayGame.java

public interface PlayGame {
    public void game(); 
}

2. Two kinds of devices, Computer.java and Phone.java, to realize the function interface

public class Computer implements PlayGame{

    @Override
    public void game() {
        System.err.println("Play computer games!!");
    }
}

public class Phone implements PlayGame {

    @Override
    public void game() {
        System.err.println("Play mobile games");
    }

}

3. Factory interface FactoryTypeInterface.java

public interface FactoryTypeInterface {  
    public PlayGame playGameType();  
} 

4. Two kinds of factories: ComputerPlayGameFactory.java and PhonePlayGameFactory.java

ps: both factories implement the factory interface in the same way with different implementation contents

/**
 * factory
 * @author Drowned fish o0
 */
public class ComputerPlayGameFactory implements FactoryTypeInterface {

    @Override
    public PlayGame playGameType() {
        // TODO Auto-generated method stub
        return new Computer();
    }

}

/**
 * Game Factory
 * 
 * @author Drowned fish o0
 */
public class PhonePlayGameFactory implements FactoryTypeInterface{

    @Override
    public PlayGame playGameType() {
        // TODO Auto-generated method stub
        return new Phone();
    }
}

5. Test:

public class PlayGameTest {
    @Test
    public void phonePlayGameTest() {
        FactoryTypeInterface typeInterface = new PhonePlayGameFactory();
        typeInterface.playGameType().game();
    }
    
    @Test
    public void computerPlayGameTest() {
        FactoryTypeInterface typeInterface = new ComputerPlayGameFactory();
        typeInterface.playGameType().game();
    }
}

6. Test results display

7. Summary

Abstract factory is a further upgrade on the common factory. It is superior to the common factory in that when we need to add new equipment, we only need to create a new factory to implement the factory interface, which has better expansion performance

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Chinese Name: Huifan

Blog name: drowned fish o0

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