我正在尝试从另一个框架打开 JPanel。无法这样做

Question

我正在创建一个程序，用于使用适当的 GUI 等进行数据库操作。我正在使用 swing 来实现同样的目的。无论如何，当我运行该应用程序时，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);

}

现在我想打开另一个名为 InventoryForm 的 JPanel。上面代码中的最后一个方法 showInventory() 应该打开 InventoryForm，但我收到错误：

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)
.................

要么我的整个方法不正确，要么我（显然）搞砸了某处。请帮忙！

Answer 1

“项目当前已冻结。”“项目当前已冻结。”

这并不完全正确。您可以在http://kenai.com/projects/bsaf查看该框架的绝对兼容分支

。即将发布 1.9 版本，修复了大量错误，并进行了一些重要改进。

如果您需要帮助解决您的问题，您可以使用该项目的论坛。那里有很多经验丰富的开发人员。提供完整堆栈跟踪和代码片段，将操作绑定到按钮或菜单项。

Answer 2

看起来您正在使用我不熟悉的 Swing 应用程序框架 (JSR 296)，但通常的方法是 add() 将面板添加到框架中，如下所示。

http://platform.netbeans.org/ frame1 = new JFrame(); 
frame1.add(new InventoryForm());
frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame1.setVisible(true);

以下是一个常见的替代方案：

frame1.getContentPane().add(new InventoryForm());

附录：在 NetBeans New Project 对话框中，“请注意，JSR-296（Swing 应用程序框架）不再开发，也不会像以前那样成为官方 Java 开发工具包的一部分”您仍然可以按原样使用 Swing 应用程序框架库，但预计不会有进一步的开发。”

“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，这是一个功能齐全的平台，适合创建复杂且可扩展的桌面应用程序，该平台包含可简化窗口、操作、文件和许多其他典型应用程序元素的处理的 API。”