问题描述
我试图将 JButton 上的文本覆盖在其后面的 ImageIcon 上.但是，当添加 imageIcon 时，文本会消失.有没有办法指定它的显示顺序?下面，我尝试分别添加图像和文本，看看是否会影响它，但没有运气.谁能帮帮我?
private void initButtons() {int 位置 X = 0，位置 Y = 525；for (int y = 0; y < 8; y++) {for (int x = 0; x < 8; x++) {boardArray[x][y] = new ChessButton();boardArray[x][y].setSize(75, 75);boardArray[x][y].setLocation(locationX, locationY);boardArray[x][y].setXAndY(x, y);如果 ((x % 2 == 0 && y % 2 == 1) || (x % 2 == 1 && y % 2 == 0)) {boardArray[x][y].setColour("white");boardArray[x][y].setIcon(new ImageIcon("Assets/white_null_null.png"));} 别的 {boardArray[x][y].setColour("black");boardArray[x][y].setIcon(new ImageIcon("Assets/black_null_null.png"));}//这以交替模式添加图像chessFrame.add(boardArray[x][y]);位置 X = 位置 X + 75；}位置 X = 0;位置 Y = 位置 Y - 75；}}无效的initPieces(){for (int y = 0; y < 8; y++) {for (int x = 0; x < 8; x++) {如果 ((x % 2 == 0 && y % 2 == 1) || (x % 2 == 1 && y % 2 == 0)) {boardArray[x][y].setFont(new Font("Arial Unicode MS", Font.PLAIN, 40));boardArray[x][y].setText("u2654");//将特定棋子设置为文本，现在只是测试它.} 别的 {boardArray[x][y].setFont(new Font("Arial Unicode MS", Font.PLAIN, 40));boardArray[x][y].setText("u2654");//将特定棋子设置为文本，现在只是测试它.//这应该将图像覆盖在文本上，但事实并非如此.}}}}首先，我看到你在调用这个方法:boardArray[x][y].setLocation(locationX, locationY);
.setLocation(...) 表示您使用的是 null 布局，请阅读
对于您未来的问题，请阅读如何制作一个有效的最小、完整且可验证的示例 (MCVE) 来证明您的问题并且您最好尝试自己解决它，我发布的代码就是一个很好的例子，因为您可以复制粘贴它并看到与我相同的结果
I am attempting to overlay the text on a JButton over an ImageIcon that is behind it. However, when the imageIcon is added, the text dissapears. Is there any way to specify the order in which it displays?
Below, i have tried to separately add the images and text to see if that would affect it, but no luck.
Can anyone help me out?
private void initButtons() {
int locationX = 0, locationY = 525;
for (int y = 0; y < 8; y++) {
for (int x = 0; x < 8; x++) {
boardArray[x][y] = new ChessButton();
boardArray[x][y].setSize(75, 75);
boardArray[x][y].setLocation(locationX, locationY);
boardArray[x][y].setXAndY(x, y);
if ((x % 2 == 0 && y % 2 == 1) || (x % 2 == 1 && y % 2 == 0)) {
boardArray[x][y].setColour("white");
boardArray[x][y].setIcon(new ImageIcon("Assets/white_null_null.png"));
} else {
boardArray[x][y].setColour("black");
boardArray[x][y].setIcon(new ImageIcon("Assets/black_null_null.png"));
}
//this adds the images in an alternating pattern
chessFrame.add(boardArray[x][y]);
locationX = locationX + 75;
}
locationX = 0;
locationY = locationY - 75;
}
}
void initPieces() {
for (int y = 0; y < 8; y++) {
for (int x = 0; x < 8; x++) {
if ((x % 2 == 0 && y % 2 == 1) || (x % 2 == 1 && y % 2 == 0)) {
boardArray[x][y].setFont(new Font("Arial Unicode MS", Font.PLAIN, 40));
boardArray[x][y].setText("u2654");//sets a particular chess piece as text, just testing it now.
} else {
boardArray[x][y].setFont(new Font("Arial Unicode MS", Font.PLAIN, 40));
boardArray[x][y].setText("u2654");//sets a particular chess piece as text, just testing it now.
//this is suposed to overlay the image over the text, but it is not.
}
}
}
}
解决方案 First of all, I see you're calling this method: boardArray[x][y].setLocation(locationX, locationY);
.setLocation(...) indicates you're using a null layout, please read Null layout is evil and Why is it frowned upon to use a null layout in Swing? to know why you should avoid its use.
For creating a Chess board, I'd be using GridLayout, please read how to use the different layout managers
Now, to overlay text over the icon, you only need to call JButton#setHorizontalAlignment(...) method and pass SwingConstants.CENTER as the parameter.
For example:
import java.awt.Color;
import java.awt.Font;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.SwingConstants;
import javax.swing.SwingUtilities;
public class ButtonWithImageAndText {
private JFrame frame;
private JButton button;
private Icon icon;
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> new ButtonWithImageAndText().createAndShowGui());
}
private void createAndShowGui() {
frame = new JFrame(getClass().getSimpleName());
try {
icon = new ImageIcon(ImageIO.read(getClass().getResource("up.jpg")));
} catch (IOException e) {
e.printStackTrace();
}
button = new JButton();
button.setIcon(icon);
button.setText("Click me!");
button.setHorizontalTextPosition(SwingConstants.CENTER);
button.setFont(new Font("Arial", Font.PLAIN, 40));
button.setForeground(Color.RED);
frame.add(button);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
}
Which gives the following output:
For your future questions, please read how to make a valid Minimal, Complete and Verifiable Example (MCVE) that demonstrates your issue and your best try to solve it yourself, the code I posted is a good example of it, as you can copy-paste it and see the same result as I
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