我正在使用适当的GUI创建一个数据库操作程序。我也在使用秋千。无论如何，当我运行应用程序时，将打开以下窗口：
public class MusicShopManagementView extends FrameView {
public MusicShopManagementView(SingleFrameApplication app) {
super(app);
initComponents();
// status bar initialization - message timeout, idle icon and busy animation, etc
ResourceMap resourceMap = getResourceMap();
int messageTimeout = resourceMap.getInteger("StatusBar.messageTimeout");
messageTimer = new Timer(messageTimeout, new ActionListener() {
public void actionPerformed(ActionEvent e) {
statusMessageLabel.setText("");
}
});
messageTimer.setRepeats(false);
int busyAnimationRate = resourceMap.getInteger("StatusBar.busyAnimationRate");
for (int i = 0; i < busyIcons.length; i++) {
busyIcons[i] = resourceMap.getIcon("StatusBar.busyIcons[" + i + "]");
}
busyIconTimer = new Timer(busyAnimationRate, new ActionListener() {
public void actionPerformed(ActionEvent e) {
busyIconIndex = (busyIconIndex + 1) % busyIcons.length;
statusAnimationLabel.setIcon(busyIcons[busyIconIndex]);
}
});
idleIcon = resourceMap.getIcon("StatusBar.idleIcon");
statusAnimationLabel.setIcon(idleIcon);
progressBar.setVisible(false);
// connecting action tasks to status bar via TaskMonitor
TaskMonitor taskMonitor = new TaskMonitor(getApplication().getContext());
taskMonitor.addPropertyChangeListener(new java.beans.PropertyChangeListener() {
public void propertyChange(java.beans.PropertyChangeEvent evt) {
String propertyName = evt.getPropertyName();
if ("started".equals(propertyName)) {
if (!busyIconTimer.isRunning()) {
statusAnimationLabel.setIcon(busyIcons[0]);
busyIconIndex = 0;
busyIconTimer.start();
}
progressBar.setVisible(true);
progressBar.setIndeterminate(true);
} else if ("done".equals(propertyName)) {
busyIconTimer.stop();
statusAnimationLabel.setIcon(idleIcon);
progressBar.setVisible(false);
progressBar.setValue(0);
} else if ("message".equals(propertyName)) {
String text = (String)(evt.getNewValue());
statusMessageLabel.setText((text == null) ? "" : text);
messageTimer.restart();
} else if ("progress".equals(propertyName)) {
int value = (Integer)(evt.getNewValue());
progressBar.setVisible(true);
progressBar.setIndeterminate(false);
progressBar.setValue(value);
}
}
});
// tracking table selection
masterTable.getSelectionModel().addListSelectionListener(
new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
firePropertyChange("recordSelected", !isRecordSelected(),
isRecordSelected());
}
});
// tracking changes to save
bindingGroup.addBindingListener(new AbstractBindingListener() {
@Override
public void targetChanged(Binding binding, PropertyStateEvent event) {
// save action observes saveNeeded property
setSaveNeeded(true);
}
});
// have a transaction started
entityManager.getTransaction().begin();
}
public boolean isSaveNeeded() {
return saveNeeded;
}
private void setSaveNeeded(boolean saveNeeded) {
if (saveNeeded != this.saveNeeded) {
this.saveNeeded = saveNeeded;
firePropertyChange("saveNeeded", !saveNeeded, saveNeeded);
}
}
public boolean isRecordSelected() {
return masterTable.getSelectedRow() != -1;
}
@Action
public void newRecord() {
musicshopmanagement.Intrument i = new musicshopmanagement.Intrument();
entityManager.persist(i);
list.add(i);
int row = list.size()-1;
masterTable.setRowSelectionInterval(row, row);
masterTable.scrollRectToVisible(masterTable.getCellRect(row, 0, true));
setSaveNeeded(true);
}
@Action(enabledProperty = "recordSelected")
public void deleteRecord() {
int[] selected = masterTable.getSelectedRows();
List<musicshopmanagement.Intrument> toRemove = new
ArrayList<musicshopmanagement.Intrument>(selected.length);
for (int idx=0; idx<selected.length; idx++) {
musicshopmanagement.Intrument i =
list.get(masterTable.convertRowIndexToModel(selected[idx]));
toRemove.add(i);
entityManager.remove(i);
}
list.removeAll(toRemove);
setSaveNeeded(true);
}
@Action(enabledProperty = "saveNeeded")
public Task save() {
return new SaveTask(getApplication());
}
private class SaveTask extends Task {
SaveTask(org.jdesktop.application.Application app) {
super(app);
}
@Override protected Void doInBackground() {
try {
entityManager.getTransaction().commit();
entityManager.getTransaction().begin();
} catch (RollbackException rex) {
rex.printStackTrace();
entityManager.getTransaction().begin();
List<musicshopmanagement.Intrument> merged = new
ArrayList<musicshopmanagement.Intrument>(list.size());
for (musicshopmanagement.Intrument i : list) {
merged.add(entityManager.merge(i));
}
list.clear();
list.addAll(merged);
}
return null;
}
@Override protected void finished() {
setSaveNeeded(false);
}
}
/**
* An example action method showing how to create asynchronous tasks
* (running on background) and how to show their progress. Note the
* artificial 'Thread.sleep' calls making the task long enough to see the
* progress visualization - remove the sleeps for real application.
*/
@Action
public Task refresh() {
return new RefreshTask(getApplication());
}
private class RefreshTask extends Task {
RefreshTask(org.jdesktop.application.Application app) {
super(app);
}
@SuppressWarnings("unchecked")
@Override protected Void doInBackground() {
try {
setProgress(0, 0, 4);
setMessage("Rolling back the current changes...");
setProgress(1, 0, 4);
entityManager.getTransaction().rollback();
setProgress(2, 0, 4);
setMessage("Starting a new transaction...");
entityManager.getTransaction().begin();
setProgress(3, 0, 4);
setMessage("Fetching new data...");
java.util.Collection data = query.getResultList();
for (Object entity : data) {
entityManager.refresh(entity);
}
setProgress(4, 0, 4);
list.clear();
list.addAll(data);
} catch(Exception ignore) { }
return null;
}
@Override protected void finished() {
setMessage("Done.");
setSaveNeeded(false);
}
}
@Action
public void showAboutBox() {
if (aboutBox == null) {
JFrame mainFrame = MusicShopManagementApp.getApplication().getMainFrame();
aboutBox = new MusicShopManagementAboutBox(mainFrame);
aboutBox.setLocationRelativeTo(mainFrame);
}
MusicShopManagementApp.getApplication().show(aboutBox);
}
@Action
public void showInventory() {
JFrame frame1 = new JFrame();
frame1.setContentPane(new InventoryForm());
frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame1.setVisible(true);
}
现在我要打开另一个名为JPanel的{{1}}。上面代码中的最后一个方法InventoryForm应该打开showInventory()，但是我收到错误：
Exception in thread "AWT-EventQueue-0" java.lang.Error: java.lang.reflect.InvocationTargetException
at org.jdesktop.application.ApplicationAction.actionFailed(ApplicationAction.java:859)
at org.jdesktop.application.ApplicationAction.noProxyActionPerformed(ApplicationAction.java:665)
at org.jdesktop.application.ApplicationAction.actionPerformed(ApplicationAction.java:698)
.................
要么我的整个方法都不正确，要么我（显然）搞砸了某个地方。请帮忙！
答案 0 :(得分：2)
“项目目前正在冻结。”“项目目前正在冻结。”
这不完全正确。您可以在http://kenai.com/projects/bsaf
查看此框架的绝对兼容的分支它即将发布1.9版本，修复了大量的错误，以及一些重要的改进。
如果您需要帮助解决问题，可以使用此项目的论坛。那里有许多经验丰富的开发人员提供完整堆栈跟踪和代码段，您可以将操作绑定到按钮或菜单项。
答案 1 :(得分：1)
看起来你正在使用我不熟悉的Swing Application Framework (JSR 296)，但通常的方法是add()面板到框架，如下所示。
http://platform.netbeans.org/ frame1 = new JFrame();
frame1.add(new InventoryForm());
frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame1.setVisible(true);
这是一个常见的选择：
frame1.getContentPane().add(new InventoryForm());
附录：来自NetBeans New Project对话框，“请注意，JSR-296（Swing应用程序框架）已不再开发，不会像原计划那样成为官方Java Development Kit的一部分。您仍然可以使用现在的Swing应用程序框架库，但预计不会进一步开发。“
“如果您正在寻找基于Swing的应用程序框架，请考虑使用NetBeans平台platform.netbeans.org，这是一个适用于创建复杂和可伸缩桌面应用程序的全功能平台。该平台包含简化API的API处理窗口，操作，文件和许多其他典型的应用程序元素。“