我有（再次）一个问题：我在背景上有一个带有图像的jbutton，但是当我想在它上面放一些文字时，它会在背景的右侧，而不是在按钮上，而是在...旁边...这是工作代码，你必须只链接一些图像:)
package program;
import java.awt.Image;
import java.awt.Insets;
import java.io.File;
import java.io.IOException;
import java.util.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingConstants;
public class Program {
private static JFrame frame;
private static JPanel panel;
private static JButton button;
private static Image buttonImage;
private static ImageIcon buttonIcon;
public static void main(String[] args) {
frame = new JFrame("Program");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
panel = new JPanel();
frame.add(panel);
frame.pack();
frame.setVisible(true);
frame.setSize(200,100);
frame.setLocationRelativeTo(null);
frame.setResizable(false);
String imgUrl = "images/";
try {
buttonImage = ImageIO.read(new File(imgUrl+"img.png"));
} catch (IOException e) {
Logger.getLogger(Program.class.getName()).log(Level.SEVERE, null, e);
}
buttonIcon = new ImageIcon(buttonImage);
button = new JButton("TEST", buttonIcon);
panel.add(button);
button.setMargin(new Insets(0, 0, 0, 0));
button.setBounds(0, 0, 146, 67);
button.setOpaque(false);
button.setContentAreaFilled(false);
button.setBorderPainted(false);
}
}
你永远不会设置背景，你设置按钮的图标
以下是在图像上显示文本的4种方法：
import java.awt.*;
import javax.swing.*;
import javax.swing.text.*;
public class LabelImageText extends JPanel
{
public LabelImageText()
{
JLabel label1 = new JLabel( new ColorIcon(Color.ORANGE, 100, 100) );
label1.setText( "Easy Way" );
label1.setHorizontalTextPosition(JLabel.CENTER);
label1.setVerticalTextPosition(JLabel.CENTER);
add( label1 );
//
JLabel label2 = new JLabel( new ColorIcon(Color.YELLOW, 200, 150) );
label2.setLayout( new BoxLayout(label2, BoxLayout.Y_AXIS) );
add( label2 );
JLabel text = new JLabel( "More Control" );
text.setAlignmentX(JLabel.CENTER_ALIGNMENT);
label2.add( Box.createVerticalGlue() );
label2.add( text );
label2.add( Box.createVerticalStrut(10) );
//
JLabel label3 = new JLabel( new ColorIcon(Color.GREEN, 200, 150) );
label3.setLayout( new GridBagLayout() );
add( label3 );
JLabel text3 = new JLabel();
text3.setText("<html><center>Text<br>over<br>Image<center></html>");
text3.setLocation(20, 20);
text3.setSize(text3.getPreferredSize());
label3.add( text3 );
//
JLabel label4 = new JLabel( new ColorIcon(Color.CYAN, 200, 150) );
add( label4 );
JTextPane textPane = new JTextPane();
textPane.setText("Add some text that will wrap at your preferred width");
textPane.setEditable( false );
textPane.setOpaque(false);
SimpleAttributeSet center = new SimpleAttributeSet();
StyleConstants.setAlignment(center, StyleConstants.ALIGN_CENTER);
StyledDocument doc = textPane.getStyledDocument();
doc.setParagraphAttributes(0, doc.getLength(), center, false);
textPane.setBounds(20, 20, 75, 100);
label4.add( textPane );
}
public static class ColorIcon implements Icon
{
private Color color;
private int width;
private int height;
public ColorIcon(Color color, int width, int height)
{
this.color = color;
this.width = width;
this.height = height;
}
public int getIconWidth()
{
return width;
}
public int getIconHeight()
{
return height;
}
public void paintIcon(Component c, Graphics g, int x, int y)
{
g.setColor(color);
g.fillRect(x, y, width, height);
}
}
private static void createAndShowUI()
{
JFrame frame = new JFrame("LabelImageText");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add( new LabelImageText() );
frame.pack();
frame.setLocationRelativeTo( null );
frame.setVisible( true );
}
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
createAndShowUI();
}
});
}
}
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class StringTest extends JFrame
implements ActionListener
{
private JTextField input, result;
private int i;
public StringTest()
{
super("String test");
i=0;
Box box1 = Box.createVerticalBox();
box1.add(new JLabel(" Input:"));
box1.add(Box.createVerticalStrut(10));
box1.add(new JLabel("Result:"));
input = new JTextField(40);
input.setBackground(Color.WHITE);
input.addActionListener(this);
input.selectAll();
result = new JTextField(40);
result.setBackground(Color.YELLOW);
result.setEditable(false);
Box box2 = Box.createVerticalBox();
box2.add(input);
box2.add(Box.createVerticalStrut(10));
box2.add(result);
Box box3 = Box.createHorizontalBox();
box3.add(box1);
box3.add(box2);
Box box4 = Box.createVerticalBox();
JButton new_game = new JButton("NEW GAME");
JLabel game_title =new JLabel("***Welcome to Hangman Game***");
box4.add(game_title);
box4.add(box3);
box4.add(Box.createVerticalStrut(10));
box4.add(box3);
box4.add(Box.createVerticalStrut(10));
box4.add(new_game);
new_game.setAlignmentX(Component.CENTER_ALIGNMENT);
Container c = getContentPane();
c.setLayout(new FlowLayout());
c.add(box4);
//c.add(box2);
// c.add(ok_button);c.add(ok1_button);
input.requestFocus();
}
public void actionPerformed(ActionEvent e)
{
String str = input.getText();
result.setText(str);
if (i%2==0)
result.setBackground(Color.WHITE);
else
result.setBackground(Color.YELLOW);
input.selectAll();
}
public static void main(String[] args)
{
StringTest window = new StringTest();
window.setBounds(100, 100, 600, 100);
window.setDefaultCloseOperation(EXIT_ON_CLOSE);
window.setVisible(true);
}
}