我有一个添加了两个JPanel的Jframe（请参阅BoardGUI类）。第一个JPanel（emptyPanel）是空的，因为我想要考虑板的空间（由DoDrawing -BoardGUI绘制）。在第二个JPanel（RightPanel）上，我想添加按钮和其他组件。当我开始添加按钮时，我注意到它们移动了几个像素。创建了板并且按钮在一个位置创建，然后它们将移动（不按按钮或与UI交互）。我为背景添加了一种颜色，并删除了下面代码中的按钮。通过运行此代码，我确认RightPanel正在移动，有时是水平移动，有时垂直移动。我试图设置一个边框布局，在EAST上添加RightPanel，同样的事情发生了。我已经尝试修复JPanes的大小（通过设置Preferred，Maximum和Minimum）和相同的东西。我不知道还能做什么。我花了好几个小时试图找到解决方案。
关于代码：从main调用SelectionScreen类，其中包含板的平方数。因此，例如，具有3行和2列的板将调用SelectionScreen（3,2）。该类创建Jframe并添加由BoardGUI创建的pJPanel和board。
public class SelectionScreen extends JFrame{
public static final int Maxwidth = Toolkit.getDefaultToolkit().getScreenSize().width - 40;
public static final int Maxheight = Toolkit.getDefaultToolkit().getScreenSize().height -40;
public static int fwidth;
public static int fheight;
public SelectionScreen (int h, int w){
Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
JFrame f=new JFrame("Movement & Target");
System.out.println( "heigth " + h + " and w " + w );
if (h <=4 && w <=4){
fwidth = (Maxwidth*2)/3;
fheight = (Maxheight*2)/3;
f.setSize (fwidth ,fheight);
}
else{
f.setSize (Maxwidth, Maxheight);
fwidth = Maxwidth;
fheight = Maxheight;
}
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setLocation(dim.width/2-f.getSize().width/2, dim.height/2-f.getSize().height/2);
BoardGUI board = new BoardGUI(fheight, fwidth, h, w);
f.add(board);
f.setVisible(true);
}
}
`
public class Board GUI extends JPanel {
private final int frameheight;
private final int framewidth;
private final int squaresheight;
private final int squareswidth;
public static int squaresize;
public final int panelwidth ;
public final int panelheight;
private int horizontalgap;
private int verticalgap;
private BufferedImage dark;
private BufferedImage light;
private TexturePaint darktp;
private TexturePaint lighttp;
public BoardGUI( int fh, int fw, int sh, int sw) {
frameheight = fh;
framewidth = fw;
squaresheight = sh;
squareswidth = sw;
panelwidth = (3*framewidth)/5;
panelheight = frameheight-70;
sizepanel2= framewidth-panelwidth;
this.setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
JPanel emptyPanel = new JPanel();
emptyPanel.setPreferredSize(new Dimension(panelwidth, frameheight));
emptyPanel.setMaximumSize(new Dimension(panelwidth, frameheight));
emptyPanel.setMinimumSize(new Dimension(panelwidth, frameheight));
emptyPanel.setBackground(new Color(0,0,0,65));
JPanel RightPanel = new JPanel ();
RightPanel.add(new JButton ("hello"));
RightPanel.add(new JButton ("hello2"));
RightPanel.setBackground (new Color(0,0,0,145));
this.add(emptyPanel);
this.add(RightPanel);
}
private void loadImages() {
try {
dark = ImageIO.read(new File("cementdark.jpeg"));
light = ImageIO.read(new File("cementlight.jpeg"));
System.out.println("It loaded");
} catch (IOException ex) {
Logger.getLogger(Surface.class.getName()).log(Level.SEVERE, null, ex);
}
}
private void doDrawing(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
//this.setBounds (20,20,panelwidth, panelheight);
if (squaresheight > squareswidth){
if (panelheight < panelwidth)
squaresize = panelheight/squaresheight;
else
squaresize = panelwidth/squaresheight;
}
else{
if (panelheight < panelwidth)
squaresize = panelheight/squareswidth;
else
squaresize = panelwidth/squareswidth;
}
System.out.println("frame width and height" + frameheight + " and " + framewidth);
System.out.println("width and height" + panelheight + " and " + panelwidth);
horizontalgap = abs(panelwidth - (squaresize* squareswidth))/2;
verticalgap = abs(panelheight - (squaresize* squaresheight))/2+20;
darktp = new TexturePaint(dark, new Rectangle(0, 0, squaresize, squaresize));
lighttp = new TexturePaint(light, new Rectangle(0, 0, squaresize, squaresize));
System.out.println("squaresize " + squaresize);
System.out.println("vertical and horizontal " + verticalgap + " and " + horizontalgap);
for (int y = 0; y< squaresheight; y++)
{
for (int x = y%2; x< squareswidth ; x+=2) {
if (y%2==0){
g2d.setPaint(darktp);
g2d.fillRect(horizontalgap +squaresize*x,
verticalgap + squaresize*y, squaresize, squaresize);
}
else{
g2d.setPaint(darktp);
g2d.fillRect((horizontalgap+squaresize*x),
verticalgap + squaresize*y, squaresize, squaresize);
}
}
}
for (int y = 0; y< squaresheight; y++)
{
for (int x = (y+1)%2; x< squareswidth ; x+=2) {
if (y%2==1){
g2d.setPaint(lighttp);
g2d.fillRect(horizontalgap +squaresize*x,
verticalgap + squaresize*y, squaresize, squaresize);
}
else{
g2d.setPaint(lighttp);
g2d.fillRect((horizontalgap+squaresize*x),
verticalgap + squaresize*y, squaresize, squaresize);
}
}
}
}
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
loadImages();
doDrawing(g); // draws board
}
}