首先，我想说我明白我问了很多，所以任何帮助都会受到赞赏，我感谢你的时间。我非常感激。
无论如何，我正在为我的A2课程创建一个游戏，通常称为Checkers。我已经完成了我的代码，一切都按照我的计划进行，除了CheckerBoard本身以及checkerpieces似乎没有显示。
我的董事会应该出现的部分只是一个黑色的空间。虽然我的电路板似乎没有显示，但我在其上执行的所有操作（例如单击某个部分）都会产生计划的响应，虽然我已经检查了我的代码，但我无法确定我做了什么错。
无论如何，如果有人可能发现我的错误或者给我一些建议，我将非常感激。谢谢
因为我当然无法上传我的整个代码，所以我会做一些我认为问题可能存在或只是重要部分的片段。谢谢
CheckerBoard content = new CheckerBoard(); // Sets the CheckerBoard values into the content to be used in the next line
application.setContentPane(content); // Container holds the values together, Content pane of the CheckerBoard
application.pack(); // Use preferred size of content to set size of application.
Dimension screensize = Toolkit.getDefaultToolkit().getScreenSize();
application.setLocation( (screensize.width - application.getWidth())/2,
(screensize.height - application.getHeight())/2 );
application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE ); // Sets so that the application can be exited when the application is closed
application.setResizable(false); // This makes it so that the user can't change the application's size.
application.setVisible(true); // Sets it so that the application can actually be seen
上面的代码放在＆＃34; public static void main（String [] args）＆＃34;
然后，我有：
public CheckerBoard() {
// This is going to be a constructor, this constructor will set the layout manager for the panel to be null, it will then add components to the panel
// and it will set their bounds.
setLayout(null); // So that it will match my requirement specification, I will do the layout myself
setBackground(new Color(0,120,0)); // Dark Green Background colour.
setPreferredSize(new Dimension(350,250)); // The size of the Panel
BoardComplete checkerboardData = new BoardComplete();
add(checkerboardData); // This will create the components and add them to the content pane
add(NewGameButton);
add(ResignButton);
add(MessageDisplay);
// I will now have to produce a method to set the position and size of each component by calling its setBounds() method
checkerboardData.setBounds(20,20,164,164); // Sets the board dimensions
NewGameButton.setBounds(210, 60, 120, 30);
ResignButton.setBounds(210, 120, 120, 30);
MessageDisplay.setBounds(20, 200, 350, 30);
}
最后我还有另一个名为BoardComplete的公共类，其中包含涉及actionlistners等的所有相关代码。使用：
BoardComplete() {
setBackground(Color.BLACK);
addMouseListener(this);
ResignButton = new JButton("Resign");
ResignButton.addActionListener(this);
NewGameButton = new JButton("New Game");
NewGameButton.addActionListener(this);
MessageDisplay = new JLabel("",JLabel.CENTER);
MessageDisplay.setFont(new Font("Serif", Font.BOLD, 14));
MessageDisplay.setForeground(Color.green);
checkerboardData = new DataForCheckers();
MakeaNewGame();
}
我知道这有很多要问，但任何帮助都会非常感激，我将非常感激。谢谢。
由于评论而编辑：这是我的Paint Class的代码：
public void PaintCheckerBoard(Graphics g) {
Graphics2D g2 = (Graphics2D)g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
// This will draw a two-pixel black border around the edges of the canvas.
g.setColor(Color.black);
g.drawRect(0,0,getSize().width-1,getSize().height-1);
g.drawRect(1,1,getSize().width-3,getSize().height-3);
// Draw the squares of the checkerboard and the checkers.
for (int row = 0; row < 8; row++) {
for (int col = 0; col < 8; col++) {
if ( row % 2 == col % 2 )
g.setColor(Color.LIGHT_GRAY);
else
g.setColor(Color.GRAY);
g.fillRect(2 + col*20, 2 + row*20, 20, 20);
switch (checkerboardData.PieceLocation(row,col)) {
case DataForCheckers.RED:
g.setColor(Color.RED);
g.fillOval(4 + col*20, 4 + row*20, 15, 15);
break;
case DataForCheckers.BLACK:
g.setColor(Color.BLACK);
g.fillOval(4 + col*20, 4 + row*20, 15, 15);
break;
case DataForCheckers.RED_KING:
g.setColor(Color.RED);
g.fillOval(4 + col*20, 4 + row*20, 15, 15);
g.setColor(Color.WHITE);
g.drawString("K", 7 + col*20, 16 + row*20);
break;
case DataForCheckers.BLACK_KING:
g.setColor(Color.BLACK);
g.fillOval(4 + col*20, 4 + row*20, 15, 15);
g.setColor(Color.WHITE);
g.drawString("K", 7 + col*20, 16 + row*20);
break;
}
}
}
// If there is a game in progress, highlight the legal moves that the player can make.
// It can be seen that in this process, LegalMoves is never null while a game is in progress
if (CheckerMatchInProgress) {
/* First, draw a 2-pixel cyan border around the pieces that can be moved. */
g.setColor(Color.cyan);
for (int i = 0; i < LegalMoves.length; i++) {
g.drawRect(2 + LegalMoves[i].fromCol*20, 2 + LegalMoves[i].fromRow*20, 19, 19);
g.drawRect(3 + LegalMoves[i].fromCol*20, 3 + LegalMoves[i].fromRow*20, 17, 17);
}
// If a piece is selected to be moved, for example if ChosenRow>=0, then
// draw a 2-pixel white border around that piece, and draw a green border
// around each square that the piece can be legally moved to.
if (ChosenRow >= 0) {
g.setColor(Color.white);
g.drawRect(2 + ChosenColumn*20, 2 + ChosenRow*20, 19, 19);
g.drawRect(3 + ChosenColumn*20, 3 + ChosenRow*20, 17, 17);
g.setColor(Color.green);
for (int i = 0; i < LegalMoves.length; i++) {
if (LegalMoves[i].fromCol == ChosenColumn && LegalMoves[i].fromRow == ChosenRow) {
g.drawRect(2 + LegalMoves[i].toCol*20, 2 + LegalMoves[i].toRow*20, 19, 19);
g.drawRect(3 + LegalMoves[i].toCol*20, 3 + LegalMoves[i].toRow*20, 17, 17);
}
}
}
}
} // end PaintCheckerBoard()
答案 0 :(得分：0)
因此，在另一个网站上查看您的代码，您的自定义绘制方法似乎永远不会从任何地方调用。您应该从Component类重写paintComponent方法（JPanel是Component的子类）。只要swing认为，或者被告知要重绘某些东西，就会调用这个paintComponent方法。
因此，请将此代码添加到BoardComplete类：
@Override
public void paintComponent(Graphics g){
super.paintComponent(g);
PaintCheckerBoard(g);
}
super.paintComponent将做任何摆动来绘制这个组件（此时只是绘制背景）。然后将Graphics对象传递给您自己的自定义绘制方法，该方法将在Graphics对象上绘制整个游戏，swing将显示为您绘制的任何内容。
所以现在你必须记住每次游戏中的某些内容发生变化时都要调用repaint（）。 repaint（）方法只会告诉swing他应该重新绘制一些东西（注意：这告诉awt线程它应该重新绘制组件，所以它从你调用repaint（）的位置异步发生。）
如果您仍然感到困惑，您应该查看一些有关如何使用此方法绘制awt / swing的信息或教程。