我正在尝试用java swing制作一个2d游戏。当我调整 JFrame 的大小时,调整大小的边缘不透明,并且看不到 2d 对象。
JFrame 类代码:
public class GameFrame
extends JFrame
{
public static JFrame G_FRAME = new JFrame();
private ArrayList<Integer> KL_DOWN;
private static GameDrawPlayer GD_PLAYER = new GameDrawPlayer();
public static int GF_WIDTH = G_FRAME.getWidth();
public static int GF_HEIGHT = G_FRAME.getHeight();
public static int H = 0;
public GameFrame()
{
KL_DOWN = new ArrayList<Integer>();
G_FRAME.setFocusable(true);
G_FRAME.getContentPane().add(GD_PLAYER);
GameKey keyListener = new GameKey(GD_PLAYER);
G_FRAME.addKeyListener(keyListener);
System.out.println(GF_WIDTH);
CR_REPEAT.start();
}
public static void GL_FRAME(String TITLE, int WIDTH, int HEIGHT)
{
javax.swing.SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
G_FRAME.setLayout(new FlowLayout());
G_FRAME.setTitle(TITLE);
G_FRAME.setSize(WIDTH, HEIGHT);
//G_FRAME.setResizable(false);
G_FRAME.isResizable();
G_FRAME.setMinimumSize(new Dimension(WIDTH, HEIGHT));
G_FRAME.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
G_FRAME.pack();
G_FRAME.setVisible(true);
}
}
);
try
{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}
catch (ClassNotFoundException
| InstantiationException
| IllegalAccessException
| UnsupportedLookAndFeelException e1)
{
e1.printStackTrace();
}
}
private ActionListener LT_ACTION = new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
GF_WIDTH = G_FRAME.getWidth();
GF_HEIGHT = G_FRAME.getHeight();
}
};
private int speed = 1;
private Timer CR_REPEAT = new Timer(speed, LT_ACTION);
}
Graphics2D 类代码:
public class GameDrawPlayer
extends JComponent
{
private static final int GP_W = 100;
private static final int GP_H = 100;
private static int GP_X = 0;
private static int GP_Y = 0;
private static GameClass GC = new GameClass();
private static int GM_PIXEL = 1;
private static Rectangle rect = new Rectangle(GP_X, GP_Y, GP_W, GP_H);
private static BufferedImage G_BI;
private static int GF_getWidth = GC.G_FRAME.G_FRAME.getWidth();
private static int SD = (int) (GC.G_FRAME.G_FRAME.getWidth());
public GameDrawPlayer()
{
try
{
G_BI = ImageIO.read(getClass().getResourceAsStream("/Images/Redox.png"));
}
catch (Exception e)
{
e.printStackTrace();
System.out.println(e);
}
GF_REPEAT.start();
}
@Override
public Dimension getPreferredSize()
{
return new Dimension(GC.PREF_W, GC.PREF_H);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D)g;
g2.drawImage(G_BI, GP_X, GP_Y, GP_W, GP_H, null);
}
public void getImgLocation()
{
System.out.print(" <-> [" + GP_X + ", " + GP_Y + "]");
}
public void refresh(){repaint();};
public void GPK_UP()
{
GP_Y = GP_Y - GM_PIXEL;
repaint();
}
public void GPK_DOWN()
{
GP_Y = GP_Y + GM_PIXEL;
repaint();
}
public void GPK_LEFT()
{
GP_X = GP_X - GM_PIXEL;
repaint();
}
public void GPK_RIGHT()
{
GP_X = GP_X + GM_PIXEL;
repaint();
}
private static int s = 0;
public void GP_COLLISION()
{
if (GP_X + GM_PIXEL > s - GP_W - (GP_W / 5) - 1)
GP_X = s - GP_W - (GP_W / 5) - 1;
}
private ActionListener LT_ACTION = new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
s = GC.G_FRAME.GF_WIDTH;
}
};
private int speed = 1;
private Timer GF_REPEAT = new Timer(speed, LT_ACTION);
}
最佳答案
您将重写绘图 JPanel 上的 getPreferredSize
,有效地将其大小设置为硬数字,然后将其添加到使用 **FlowLayout 的容器中。因此,如果 JPanel 的容器、JFrame 的 contentPane 增大并且绘图保持剪裁状态,则 JPanel 的大小不会增大。解决方案:出于此类目的,避免使用过于简单的布局(例如 FlowLayout)。为什么不使用 BorderLayout 来代替呢?
顺便说一句,您将需要学习和使用 Java naming conventions 。变量名应全部以小写字母开头,而类名应以大写字母开头。学习并遵循这一点将使我们更好地理解您的代码,并且将使您更好地理解其他人的代码。
除了第二点:你粗暴且不恰本地使用了 static 修饰符。我会避免使用它,除非您正在处理常量,或者您对它有明确的明确需要,并注意“编译器告诉我使用它”不算数,因为这仅意味着代码需要进行修复,以便编译器允许该变量保留实例变量。
旁白第三点:无论您认为 G_FRAME.isResizable();
正在做什么,请理解它并没有这样做。这个调用除了返回一个 boolean 值之外什么也不做——一个你正在丢弃的 boolean 值。
关于java - 调整大小时,2D 对象被 JFrame 边缘遮挡,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/34365989/