Question

我在使用Rectangle类制作的菜单中显示了文本。我想知道我是否可以这样做以便能够选择文本，并且您可以使用键盘箭头选择您的选择，然后按Enter键，然后它将执行下一个操作。这就是我到目前为止所拥有的：

public Rectangle menuBorder;
    public Rectangle menu;
    BufferedImage character;
    private java.awt.Point characterLocation;
    private java.awt.Point borderLocation;
    private java.awt.Point menuLocation;
    public int charW = 24;
    public int charH = 36;
    public int borderW = 210;
    public int borderH = 80;
    public int menuW = 190;
    public int menuH = 60;


    public boolean right = false;
    public boolean left = false;
    public boolean up = false;
    public boolean down = false;

    public Keying(Display f, Images i) throws IOException
    {
        character = ImageIO.read(getClass().getResource("starting mon.png"));
        menuBorder = new Rectangle(10, 10, borderW, borderH);
        menu = new Rectangle(10, 10, menuW, menuH);
        characterLocation = new Point(175, 100);
        borderLocation = new Point(175, 270);
        menuLocation = new Point(185, 280);

//...


    @Override
    protected void paintComponent(Graphics g)
    {
        super.paintComponent(g);
        this.setBackground(Color.white);
        g.drawImage(character, characterLocation.x, characterLocation.y, this);
        g.setColor(Color.black);
        g.fillRect(borderLocation.x, borderLocation.y, borderW, borderH);
        g.setColor(Color.white);
        g.fillRect(menuLocation.x, menuLocation.y, menuW, menuH);
        g.setColor(Color.black);
        g.setFont(new Font("Arial", Font.BOLD, 20));
        g.drawString("Battle", 190, 305);
        g.drawString("Feed", 320, 305);
        g.drawString("Pet", 200, 335);
        g.drawString("Age", 325, 335);
    }
//...

Answer 1

首先，请参阅我关于绘画的第一条评论......

您将需要某种“状态”变量，以便您可以确定应该绘制哪种状态，这可以通过使用某种ListSelectionModel来实现。

您可能需要MouseListener和MouseMotionListener来监控鼠标的状态，有关详细信息，请参阅How to Write a Mouse Listener。

您可能还想查看How to Use Key Bindings。

当然，您可以使用JList并省去麻烦......请参阅How to Use Lists

如何用Java制作菜单按钮？

1 个答案: