为什么图片会重叠？

[xxxadi]

写了一个Cell类继承自JPanel。
构造方法如下：
public Cell(){
this.setOpaque(false);
this.setPreferredSize(new Dimension(40, 40));
this.addMouseListener(new MouseListener());
}
paintComponent方法里面重写为：
Image img = ImageIO.read(new File("image/number/已知" + i + ".png"));
g.drawImage(img, 0, 0, 40, 40, this);

然后又写了一个Grid类继承自JPanel。
构造方法如下：
public class Grid extends JPanel{
Cell[][] grid = new Cell[3][3];

public Grid() {
this.setOpaque(false);
this.setPreferredSize(new Dimension(122, 122));
this.setLayout(new GridLayout(3, 3, 1, 1));
for (int i = 0; i < 3; i++){
for (int j = 0; j < 3; j++){
grid[i][j] = new Cell();
this.add(grid[i][j]);
}
}
}

}

然后又搞了个Sudoku类继承自JFrame。
构造方法里主要含有：
Grid part = new grid();
gamePanelBlue.add(part);//gamePanelBlue是Sudoku的构造方法中定义的一个JPanel
part.setBounds(496, 318, 122, 122);

结果运行之后显示出来是9个图片叠加起来的状况(1在最上面。。因为图片是透明的所以看得出来)
而且这些叠加的图片只能显示半截。。= =
如果改成FlowLayout就能显示全。但是还是叠加起来的状况

这是怎么回事呢？GridLayout是在起作用（移到这些图片应在的位置上那些图片有选中的效果）
但是为什么画出的图片都堆在左上角了？而不是在自己的那个cell里面？

纠结一天了。。。T T这个要怎么改才行？先谢过各位大牛了~~~~~~

[xxx_di]

呜..请问有人知道么~

[xiaohuanjie]

不会，帮顶

[xxxadi]

请问有人知道么。。我觉得应该是paintComponent方法里有问题。。但不知道具体是什么出了问题？？

[focusforce]

上相关全部代码吧。

[xxxadi]

Cell类：

public class Cell extends JPanel{
	//该位置存储的数
	private int number;
	//该位置能否被修改
	private boolean changeable;
	//判断该位置是否属于答案区
	private boolean belongsToAnswersPart;
	//判断该位置是否属于出题区（用户自定义题目时使用）
	private boolean belongsToQuestionsPart;
	//该位置的坐标
	private int x, y;
	//判断鼠标是否已进入该位置
	private boolean enter;
	//判断该位置是否已被选中
	private boolean chosen;
	//判断该位置是否属于自定义时的地图
	private boolean belongsToCustom;
	
	
	public Cell(){
		this.setOpaque(false);
		this.setPreferredSize(new Dimension(40, 40));
		this.addMouseListener(new MouseListener());
		
		
		
	}
	
	public int getNumber(){
		return this.number;
	}
	
	public void setNumber(int num){
		this.number = num;
		repaint();
	}
	
	public boolean getChangeable(){
		return this.changeable;
	}
	
	public void setChangeable(boolean changeable){
		this.changeable = changeable;
	}
	
	public boolean getBelongsToAnswersPart(){
		return this.belongsToAnswersPart;
	}
	
	public void setBelongsToAnswersPart(boolean isAnswersPart){
		this.belongsToAnswersPart = isAnswersPart;
	}
	
	public boolean getBelongsToQuestionsPart(){
		return this.belongsToQuestionsPart;
	}
	
	public void setBelongsToQuestionsPart(boolean isQuestionsPart){
		this.belongsToAnswersPart = isQuestionsPart;
	}
	
	
	public int getX(){
		return this.x;
	}
	
	public void setX(int x){
		this.x = x;
	}
	
	public int getY(){
		return this.y;
	}
	
	public void setY(int y){
		this.y = y;
	}
	
	public boolean getEnter(){
		return this.enter;
	}
	
	public void setEnter(boolean enter){
		this.enter = enter;
		repaint();
	}
	
	public boolean getChosen(){
		return this.chosen;
	}
	
	public void setChosen(){
		this.chosen = !this.chosen;
		repaint();
	}
	
	public void setChosen(boolean choose){
		this.chosen = choose;
		repaint();
	}
	
	public boolean getBelongsToCustom(){
		return this.belongsToCustom;
	}
	
	public void setBelongsToCustom(boolean belongsToCustom){
		this.belongsToCustom = belongsToCustom;
	}
	
	protected void paintComponent(Graphics g){
		super.paintComponent(g);
		
		if (this.getChosen()){
			Graphics2D g2d=(Graphics2D)g;
			Stroke stroke=new BasicStroke(5.0f);
			g2d.setStroke(stroke);
			g2d.setColor(Color.RED);
			g2d.drawRoundRect(0, 0, 40, 40, 10, 10);
		}
		
		if (this.getEnter()){
			Graphics2D g2d=(Graphics2D)g;
			Stroke stroke=new BasicStroke(4.0f);
			g2d.setStroke(stroke);
			g2d.setColor(Color.PINK);
			g2d.drawRoundRect(0, 0, 40, 40, 10, 10);
		}
		
		for(int i = 1; i < 10; i++){
			if(this.number == i){
				if((this.getChangeable() == false && this.getBelongsToAnswersPart() == false ) || this.getBelongsToCustom()){
					try {
						Image img = ImageIO.read(new File("image/number/已知" + i + ".png"));
						g.drawImage(img,0, 0, 40, 40, this);
					} catch (IOException e) {
						e.printStackTrace();
						JOptionPane.showMessageDialog(null, "找不到图片！");
					}
				}
				else {				
					try {
						Image img = ImageIO.read(new File("image/number/输入" + i + ".png"));
						g.drawImage(img, 0, 0, 40, 40, this);
					} catch (IOException e) {
						e.printStackTrace();
						JOptionPane.showMessageDialog(null, "找不到图片！");
					}
				}
			}
		}
		
		
		
		
		if (!(this.getBelongsToAnswersPart() || this.getBelongsToQuestionsPart())){
			if (this.isRepeated(Cell.this.getNumber())){
				try {
					Image img = ImageIO.read(new File("image/number/重复.png"));
					g.drawImage(img, 0, 0, 40, 40, this);
					} catch (IOException e) {
						e.printStackTrace();
						JOptionPane.showMessageDialog(null, "找不到图片！");
						}
					}
			}
		
	}


	private class MouseListener extends MouseAdapter {
		public void mouseClicked(MouseEvent e){
			if(Cell.this.getChangeable()){	
				Cell.this.setChosen();
				if(Cell.this.getBelongsToCustom()){
					CustomizedSudoku.setSiteSelected();
				}else {
					Sudoku.setSiteSelected();
				}		
				
				
				if(!(Cell.this.getBelongsToAnswersPart() || Cell.this.getBelongsToQuestionsPart())){
					if (Cell.this.getChosen()){
						for(int i = 0; i < 9; i++){
							for(int j = 0; j < 9; j++){
								if (i != Cell.this.getX() && j != Cell.this.getY()){
									if (Cell.this.getBelongsToCustom()){
										CustomizedSudoku.sudoku[i / 3][j / 3].grid[i  % 3][j % 3].setChosen(false);
									}else {
										Sudoku.sudoku[i / 3][j / 3].grid[i  % 3][j % 3].setChosen(false);
									}									
								}
							}
						}
					}
				}
				
				//该位置被选中
				if(Cell.this.getBelongsToCustom()){
					CustomizedSudoku.setLastX(Cell.this.getX());
					CustomizedSudoku.setLastY(Cell.this.getY());								
				}else{
					Sudoku.setLastX(Cell.this.getX());
					Sudoku.setLastY(Cell.this.getY());		
				}
			}
			else if(Cell.this.getBelongsToAnswersPart()){
				//已经有位置被选中了
				if(Sudoku.getSiteSelected()){
					//重复与否判断
					if (!Cell.this.isRepeated(Cell.this.getNumber())){
						Sudoku.sudoku[Sudoku.getLastX() / 3][Sudoku.getLastY() / 3].grid[Sudoku.getLastX()  % 3][Sudoku.getLastY() % 3].setNumber(Cell.this.getNumber());
						Sudoku.displayArray[Sudoku.getLastX()][Sudoku.getLastY()] = Cell.this.getNumber();
					}else {
						Sudoku.sudoku[Sudoku.getLastX()  / 3][Sudoku.getLastY() / 3].grid[Sudoku.getLastX()  % 3][Sudoku.getLastY() % 3].setNumber(Cell.this.getNumber());
						Timer timer = new Timer(2000, new ActionListener(){
							public void actionPerformed(ActionEvent e){
								Sudoku.sudoku[Sudoku.getLastX() / 3][Sudoku.getLastY() / 3].grid[Sudoku.getLastX() % 3][Sudoku.getLastY() % 3].setNumber(0);
								Sudoku.displayArray[Sudoku.getLastX()][Sudoku.getLastY()] = 0;
							}
						});
						timer.start();
						if (Sudoku.sudoku[Sudoku.getLastX() / 3][Sudoku.getLastY() / 3].grid[Sudoku.getLastX() % 3][Sudoku.getLastY() % 3].getNumber() == 0){
							timer.stop();
						}
					}
									
				}
			}
			else if(Cell.this.getBelongsToQuestionsPart()){
				if(CustomizedSudoku.getSiteSelected()){
					//重复与否判断
					if (!Cell.this.isRepeated(Cell.this.getNumber())){
						CustomizedSudoku.custom[CustomizedSudoku.getLastX()][CustomizedSudoku.getLastY()] = Cell.this.getNumber();
						CustomizedSudoku.sudoku[CustomizedSudoku.getLastX() / 3][CustomizedSudoku.getLastY() / 3].grid[CustomizedSudoku.getLastX() % 3][CustomizedSudoku.getLastY() % 3].setNumber(Cell.this.getNumber());
					}else {
						CustomizedSudoku.sudoku[CustomizedSudoku.getLastX() / 3][CustomizedSudoku.getLastY() / 3].grid[CustomizedSudoku.getLastX() % 3][CustomizedSudoku.getLastY() % 3].setNumber(Cell.this.getNumber());
						Timer timer = new Timer(2000, new ActionListener(){
							public void actionPerformed(ActionEvent e){
								CustomizedSudoku.sudoku[CustomizedSudoku.getLastX() / 3][CustomizedSudoku.getLastY() / 3].grid[CustomizedSudoku.getLastX() % 3][CustomizedSudoku.getLastY() % 3].setNumber(0);
							}
						});
						timer.start();
						if (CustomizedSudoku.sudoku[CustomizedSudoku.getLastX() / 3][CustomizedSudoku.getLastY() / 3].grid[CustomizedSudoku.getLastX() % 3][CustomizedSudoku.getLastY() % 3].getNumber() == 0){
							timer.stop();
						}
					}
									
				}
			}
			//**********尚未：如果点了提示，则在小面板中标出可行的数字
		}
		
		public void mouseEntered(MouseEvent e){
			Cell.this.setEnter(true);
		}
		public void mouseExited(MouseEvent e){
			Cell.this.setEnter(false);
			repaint();
		}
	}

	protected boolean isRepeated(int number){
		int x = 0, y = 0;
		
		if(this.getBelongsToAnswersPart()){
			x = Sudoku.getLastX() / 3;
			y = Sudoku.getLastY() / 3;
			
			for (int i = 0; i < 3; i++){
				for (int j = 0; j < 3; j++){
					//检查同格
					if (Sudoku.sudoku[x][y].grid[i][j].getNumber() == number){
						return true;
					}
					//检查同列
					if (Sudoku.sudoku[x+i][y].grid[Sudoku.getLastX() % 3][j].getNumber() == number){
		    			return true;
		    		}
					//检查同行
					if (Sudoku.sudoku[x][y+i].grid[j][Sudoku.getLastY() % 3].getNumber() == number){
		    			return true;
		    		}
				}
			}
		}
		
		if(this.getBelongsToQuestionsPart()){
			x = CustomizedSudoku.getLastX() / 3;
			y = CustomizedSudoku.getLastY() / 3;
			
			for (int i = 0; i < 3; i++){
				for (int j = 0; j < 3; j++){
					//检查同格
					if (CustomizedSudoku.sudoku[x][y].grid[i][j].getNumber() == number){
						return true;
					}
					//检查同列
					if (CustomizedSudoku.sudoku[x+i][y].grid[CustomizedSudoku.getLastX() % 3][j].getNumber() == number){
		    			return true;
		    		}
					//检查同行
					if (CustomizedSudoku.sudoku[x][y+i].grid[j][CustomizedSudoku.getLastY() % 3].getNumber() == number){
		    			return true;
		    		}
				}
			}
		}
		
		if(number == 0){
			return false;
		}
		return false;
	}		
}

Grid类：

public class Grid extends JPanel{		
	Cell[][] grid = new Cell[3][3];
	
	public Grid() {
		this.setOpaque(false);
		this.setPreferredSize(new Dimension(122, 122));
		this.setLayout(new GridLayout(3, 3, 1, 1));
		for (int i = 0; i < 3; i++){
			for (int j = 0; j < 3; j++){
				grid[i][j] = new Cell();
				this.add(grid[i][j]);
			}
		}
	}	
}

应该是这两个里面哪个地方出问题了。。

[focusforce]

我洗澡完上来仔细看了再回复，swing比较精通，乐于解决问题：）

[xxxadi]

[Quote=引用 6 楼 focusforce 的回复:]
我洗澡完上来仔细看了再回复，swing比较精通，乐于解决问题：）
[/Quote]

谢谢！！
另外Cell类某些地方我小改了些内容。。不过还是显示重叠的- -

[focusforce]

代码编译不过，看得累死了，给你一段我写的代码，看看是否对你有用。

public class HomePageModulePanel extends JPanel
{
private ImageIcon wallpaper;
public HomePageModulePanel(String title)
{
if (title.equals("mokuai1"))
{
wallpaper = ImageIconUtil.getImageIcon("01.PNG");
}
else if(title.equals("mokuai2"))
{
wallpaper = ImageIconUtil.getImageIcon("02.PNG");
}
......
}
protected void paintComponent(Graphics g)
{
// Image image = wallpaper.getImage();
int cw = getWidth();
int ch = getHeight();

ImageIcon scaledSymbol = new ImageIcon(wallpaper.getImage()
.getScaledInstance(cw, ch, Image.SCALE_SMOOTH));
g.drawImage(scaledSymbol.getImage(), 0, 0, this);
}
}
}


public class HomePagePanel extends JPanel
{
public HomePagePanel()
{
super();
setBorder(new EmptyBorder(8, 8, 8, 8));
setLayout(new GridLayout(3, 2, 8, 8));
initView();
}

public void initView()
{
add(new HomePageModulePanel("mokuai1"));
add(new HomePageModulePanel("mokuai2"));
......
}

}

[xxxadi]

终于找到问题了。。透明的图片像素为0。。= =所以几个背景透明的图片都叠一起了~~
不过还是要谢谢楼上~~^ ^