Question

我正在研究工厂模式，我怀疑哪种方法可以用来构建它。我开发了两个完全相同的progama，唯一的区别是实现相关模式的代码。比较后可以帮我找到：

代码哪一个更适合可重用性，JVM，性能等等，数字1或2？
是一种更好的方式吗？

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艺术家

    public class ArtistFrame extends AbstractFactoryJInternalFrame {

public ArtistFrame(String title, int x, int y) {
    super(title, x, y);
}

@Override
void makeButtons() {

    JButton addBtn = new JButton("Add");
    addBtn.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent actionEvent) {
            //to do
        }
    });

    JButton saveBtn = new JButton("Save");
    saveBtn.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent actionEvent) {
            //to do
        }
    });

    JButton deleteBtn = new JButton("Delete");
    deleteBtn.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent actionEvent) {
            //to do
        }
    });

    JButton cancelBtn = new JButton("Cancel");
    cancelBtn.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent actionEvent) {
            //to do
        }
    });

    add(addBtn, BorderLayout.SOUTH);
    add(saveBtn, BorderLayout.NORTH);
    add(deleteBtn, BorderLayout.EAST);
    add(cancelBtn, BorderLayout.WEST);

}
}

轨道

public class TrackFrame extends AbstractFactoryJInternalFrame {

    public TrackFrame(String title, int x, int y) {
        super(title, x, y);

    }

    @Override
    void makeButtons() {

        JButton addBtn = new JButton("Add");
        addBtn.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent actionEvent) {
                //to do
            }
        });

        JButton saveBtn = new JButton("Save");
        saveBtn.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent actionEvent) {
                //to do
            }
        });

        JButton deleteBtn = new JButton("Delete");
        deleteBtn.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent actionEvent) {
                //to do
            }
        });

        JButton cancelBtn = new JButton("Cancel");
        cancelBtn.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent actionEvent) {
                //to do
            }
        });

        add(addBtn, BorderLayout.NORTH);
        add(saveBtn, BorderLayout.CENTER);
        add(deleteBtn, BorderLayout.EAST);
        add(cancelBtn,BorderLayout.WEST);

    }
}

相册

public class AlbumFrame extends AbstractFactoryJInternalFrame {

    public AlbumFrame(String title, int x, int y) {
        super(title, x, y);

    }

    @Override
    void makeButtons() {

        JButton addBtn = new JButton("Add");
        addBtn.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent actionEvent) {
                //to do
            }
        });

        JButton saveBtn = new JButton("Save");
        saveBtn.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent actionEvent) {
                //to do
            }
        });

        JButton deleteBtn = new JButton("Delete");
        deleteBtn.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent actionEvent) {
                //to do
            }
        });

        JButton cancelBtn = new JButton("Cancel");
        cancelBtn.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent actionEvent) {
                //to do
            }
        });

        add(addBtn, BorderLayout.EAST);
        add(saveBtn, BorderLayout.WEST);
        add(deleteBtn, BorderLayout.NORTH);
        add(cancelBtn, BorderLayout.SOUTH);

    }
}

案例1
主类

public class TestSwing extends JFrame {

    JDesktopPane desktop;
    AbstractFactoryJInternalFrame artistFrame;
    AbstractFactoryJInternalFrame albumFrame;
    AbstractFactoryJInternalFrame trackFrame;

    public TestSwing() {

        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setSize(500,300);

        desktop = new JDesktopPane();

        artistFrame = AbstractFactoryJInternalFrame.getFrame("Artist",10,10);
        albumFrame = AbstractFactoryJInternalFrame.getFrame("Album", 20, 20);
        trackFrame = AbstractFactoryJInternalFrame.getFrame("Track", 30,30);

        desktop.add(artistFrame);
        desktop.add(albumFrame);
        desktop.add(trackFrame);

        setContentPane(desktop);

        setVisible(true);

    }

    public static void main(String[] args) {

        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                TestSwing ts = new TestSwing();
            }
        });

    }
}

工厂类公共抽象类AbstractFactoryJInternalFrame扩展了JInternalFrame {

protected AbstractFactoryJInternalFrame(String title, int x, int y) {
    super(title, true, true, true, true);
    setLocation(y,y);

}

public static AbstractFactoryJInternalFrame getFrame(String title, int x, int y) {

    AbstractFactoryJInternalFrame frame = null;

    if (title.equals("Artist")) {
        frame = new ArtistFrame(title, x, y);

    } else if (title.equals("Album")) {
        frame = new AlbumFrame(title, x, y);

    } else {
        frame = new TrackFrame(title, x, y);
    }

    frame.makeButtons();
    frame.pack();
    frame.setVisible(true);

    return frame;

}

abstract void makeButtons();
}

案例2
主类

public class TestSwing extends JFrame {

    JDesktopPane desktop;

    AbstractFactoryJInternalFrame artistFrame;
    AbstractFactoryJInternalFrame albumFrame;
    AbstractFactoryJInternalFrame trackFrame;

    public TestSwing() {

        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setSize(500,300);

        desktop = new JDesktopPane();

        artistFrame = new ArtistFrame("Arist",10,10);
        albumFrame = new AlbumFrame("Album", 20, 20);
        trackFrame = new TrackFrame("Track", 30,30);

        desktop.add(artistFrame);
        desktop.add(albumFrame);
        desktop.add(trackFrame);

        setContentPane(desktop);

        setVisible(true);
    }


    public static void main(String[] args) {

        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                TestSwing ts = new TestSwing();
            }
        });

    }
}

工厂类

    public abstract class AbstractFactoryJInternalFrame extends JInternalFrame {

protected AbstractFactoryJInternalFrame(String title, int x, int y) {
    super(title, true, true, true, true);
    setLocation(y,y);
    makeButtons();
    pack();
    setVisible(true);


}

abstract void makeButtons();
}

Answer 1

事实上，您的案例＃2似乎不是“工厂”，因为您使用运算符 new 来创建实例。另一方面，情况＃1似乎是正确的，但我不知道getFrame（..）的作用，因为代码没有发布。

 artistFrame = AbstractFactoryJInternalFrame.getFrame("Artist",10,10);

无论如何，您应该查看此链接Factory Pattern

在Java中使用Factory Pattern

1 个答案: