Java Swing的JFrame的背景没有显示 [英] Java Swing JFrame Background is not showing
本文介绍了Java Swing的JFrame的背景没有显示的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我不知道为什么的背景颜色是不是对我的JFrame显示。下面是code，我试过了。
当我打电话
AnimatedDialogBox animatedDialogBox =新AnimatedDialogBox（拯救TransSet表，dataSheetTable）;
它不显示，我所需的确切颜色。它示出了没有任何背景颜色。该AnimatedDialogBox类是每如下：
进口java.awt.Color中;
进口java.awt.Dimension中;
进口java.awt.Point中;
进口java.awt.Toolkit中;
进口java.beans.PropertyChangeEvent中;
进口的java.beans.PropertyChangeListener;
进口javax.swing.JComponent中;
进口javax.swing.JFrame中;
进口javax.swing.JLabel中;
进口javax.swing.JProgressBar中;
进口javax.swing.SwingWorker;
进口net.miginfocom.swing.MigLayout;
公共类AnimatedDialogBox { 私人的JFrame progressDialog;
JProgressBar的私人酒吧;
私人任务的任务;
私人ResourceManager的ResourceManager的=新的ResourceManager（）; 公共AnimatedDialogBox（字符串消息，JComponent的为父级）{
progressDialog =新的JFrame（消息）;
progressDialog.setLayout（新MigLayout（））;
progressDialog.setUndecorated（真）;
progressDialog.setBackground（resourceManager.getColor（error.Panel.background））; // RGB = 243，255，159
progressDialog.set preferredSize（新尺寸（300，100））;
JLabel的标签=新JLabel的（消息）;
label.setBackground（resourceManager.getColor（error.Panel.background））;
progressDialog.add（标签，gapbefore 80，gapbottom 30，包装）;
栏=新JProgressBar的（0，100）;
bar.setIndeterminate（真）;
bar.setBackground（resourceManager.getColor（error.Panel.background））;
progressDialog.add（酒吧，gapbefore 80，gapbottom 30，包装）;
progressDialog.setFocusableWindowState（假）;
逐点= progressDialog.getLocation（）;
尺寸CDIM = parentComponent.getSize（）; progressDialog.setLocation（（int）的（cDim.getWidth（）/ 2）-100，
（INT）cDim.getHeight（）+ 350）; progressDialog.pack（）; 任务=新任务（）;
task.addPropertyChangeListener（新的PropertyChangeListener（）{
@覆盖
公共无效的propertyChange（PropertyChangeEvent的EVT）{
如果（evt.getPropertyName（）。equalsIgnoreCase（进步））{
INT进度= task.getProgress（）;
如果（进度== 0）{
bar.setIndeterminate（真）;
}其他{
bar.setIndeterminate（假）;
bar.setValue（进度）;
progressDialog.dispose（）;
}
}
}
}）;
task.execute（）;
progressDialog.setVisible（真）;
} 类任务扩展的SwingWorker＆LT;太虚，太虚＆GT; {
私有静态最后长SLEEP_TIME = 1000; 公共任务（）{
} @覆盖
公共无效doInBackground（）{
setProgress（0）;
尝试{
视频下载（SLEEP_TIME）; //模仿长时间运行的任务
}赶上（InterruptedException的E）{
}
setProgress（100）;
返回null;
} @覆盖
公共无效完成（）{
Toolkit.getDefaultToolkit（）音（）。
}
}
}
解决方案
的背景颜色构造JProgressBar 是由它的UI代理确定，的ProgressBarUI 。例如，
UIManager.put（ProgressBar.background，Color.red）;
不是所有的实现使用的颜色;例如， com.apple.laf.AquaProgressBarUI 忽略见过有利于外观设置的此处。作为替代方案，你可能要考虑封闭面板上的有色背景或边框，所建议的这里。
另外请注意，您可以从更新GUI程序（）方法，如图所示的这里。
I don't know why the background color is not showing on my Jframe. Below is the code that I tried.
When I call
AnimatedDialogBox animatedDialogBox = new AnimatedDialogBox("Saving TransSet form", dataSheetTable);
Its not showing the exact color that I needed. It shows without any background color. The AnimatedDialogBox class is per below :
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.Toolkit;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JProgressBar;
import javax.swing.SwingWorker;
import net.miginfocom.swing.MigLayout;
public class AnimatedDialogBox {
private JFrame progressDialog ;
private JProgressBar bar;
private Task task;
private ResourceManager resourceManager = new ResourceManager();
public AnimatedDialogBox(String message, JComponent parentComponent) {
progressDialog = new JFrame( message);
progressDialog.setLayout(new MigLayout());
progressDialog.setUndecorated(true);
progressDialog.setBackground(resourceManager.getColor("error.Panel.background")); // RGB = 243, 255, 159
progressDialog.setPreferredSize(new Dimension(300, 100));
JLabel label = new JLabel(message);
label.setBackground(resourceManager.getColor("error.Panel.background"));
progressDialog.add(label, "gapbefore 80,gapbottom 30, wrap");
bar = new JProgressBar(0, 100);
bar.setIndeterminate(true);
bar.setBackground(resourceManager.getColor("error.Panel.background"));
progressDialog.add(bar, "gapbefore 80, gapbottom 30, wrap");
progressDialog.setFocusableWindowState(false);
Point point = progressDialog.getLocation();
Dimension cDim = parentComponent.getSize();
progressDialog.setLocation((int) (cDim.getWidth() / 2)-100,
(int) cDim.getHeight() + 350);
progressDialog.pack();
task = new Task();
task.addPropertyChangeListener(new PropertyChangeListener() {
@Override
public void propertyChange(PropertyChangeEvent evt) {
if (evt.getPropertyName().equalsIgnoreCase("progress")) {
int progress = task.getProgress();
if (progress == 0) {
bar.setIndeterminate(true);
} else {
bar.setIndeterminate(false);
bar.setValue(progress);
progressDialog.dispose();
}
}
}
});
task.execute();
progressDialog.setVisible(true);
}
class Task extends SwingWorker<Void, Void> {
private static final long SLEEP_TIME = 1000;
public Task() {
}
@Override
public Void doInBackground() {
setProgress(0);
try {
Thread.sleep(SLEEP_TIME);// imitate a long-running task
} catch (InterruptedException e) {
}
setProgress(100);
return null;
}
@Override
public void done() {
Toolkit.getDefaultToolkit().beep();
}
}
}
解决方案
The background color of a JProgressBar is determined by its UI delegate, ProgressBarUI. For example,
UIManager.put("ProgressBar.background", Color.red);
Not all implementations use the color; for example, com.apple.laf.AquaProgressBarUI ignores the setting in favor of the appearance seen here. As an alternative, you may want to consider a tinted background or Border on the enclosing panel, as suggested here.
Also note that you can update the GUI from the process() method, as shown here.
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