该程序是用 Java 6 开发的。似乎 JLayer 不可用。如果我错了，您能否提供一些有关如何执行此操作的代码？
一些笔记
例如
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GridBagConstraints;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JProgressBar;
import javax.swing.JRadioButton;
import javax.swing.UIManager;
//https://stackoverflow.com/questions/14560680/jprogressbar-low-values-will-not-be-displayed
public class ProgressSample {
private JFrame frame = new JFrame("GlassPane instead of JLayer");
private JLabel label;
private GridBagConstraints gbc = new GridBagConstraints();
private JProgressBar progressSeven;
public ProgressSample() {
frame.setLayout(new FlowLayout());
frame.add(new JButton("test"));
frame.add(new JCheckBox("test"));
frame.add(new JRadioButton("test"));
// Nothing is displayed if value is lover that 6
JProgressBar progressSix = new JProgressBar(0, 100);
progressSix.setValue(2);
frame.add(progressSix);
// but this works value is higher that 6
progressSeven = new JProgressBar(0, 100);
progressSeven.addComponentListener(new ComponentAdapter() {
@Override
public void componentMoved(ComponentEvent e) {
label.setBounds(
(int) progressSeven.getBounds().getX(),
(int) progressSeven.getBounds().getY(),
label.getPreferredSize().width,
label.getPreferredSize().height);
}
});
progressSeven.setValue(7);
frame.add(progressSeven);
label = new JLabel();
label.setText("<html> Concurency Issues in Swing<br>"
+ " never to use Thread.sleep(int) <br>"
+ " durring EDT, simple to freeze GUI </html>");
label.setPreferredSize(new Dimension(label.getPreferredSize().width, label.getPreferredSize().height));
Container glassPane = (Container) frame.getRootPane().getGlassPane();
glassPane.setVisible(true);
glassPane.setLayout(null);
glassPane.add(label, gbc);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {
e.printStackTrace();
}
ProgressSample dialogTest = new ProgressSample();
}
}
编辑
我的第一个想法是使用 html，但令人惊讶的是（对我而言）进度条不支持它...... by @kleopatra
和
我想我的问题可能不够清楚。我不希望文本超出 JProgressBar 边界。另外，我不想手动插入换行符（即 no
）。我添加了我想要的图片。通过@Maxbester
- 结果是
JProgressBar用作Container，放在那里，LayoutManager覆盖JProgressBarJLabel
- 增强，设置
EmptyBorder为JLabel，例如label.setBorder(new EmptyBorder(15, 15, 15, 15));
EDIT2（图标是，也可以是半透明的，可以覆盖JProgressBar）
代码可能类似于
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JProgressBar;
import javax.swing.UIManager;
import javax.swing.border.EmptyBorder;
public class JProgressBarWithJLabel {
private JFrame frame = new JFrame("JLabel in JProgressBar");
private JLabel label;
private JProgressBar progressSeven;
public JProgressBarWithJLabel() {
progressSeven = new JProgressBar(0, 100){
@Override
public Dimension getPreferredSize() {
return new Dimension(300, 60);
}
};
progressSeven.setValue(38);
progressSeven.setLayout(new BorderLayout(5, 5));
label = new JLabel();
label.setHorizontalTextPosition(JLabel.CENTER);
label.setVerticalTextPosition(JLabel.CENTER);
label.setBorder(new EmptyBorder(15, 15, 15, 15));
label.setText("<html>I have already changed the JProgressBar's height "
+ "to be able to write the text on two lines but I don't want "
+ "to the change the width.</html>");
progressSeven.add(label, BorderLayout.CENTER);
frame.add(progressSeven);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
try {
for (UIManager.LookAndFeelInfo laf : UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(laf.getName())) {
UIManager.setLookAndFeel(laf.getClassName());
}
}
} catch (Exception e) {
e.printStackTrace();
}
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new JProgressBarWithJLabel();
}
});
}
}
编辑3：
WindowsClassicLookAndFeel 的默认剥离（图标不是半透明的）
