Codice: Seleziona tutto
An exception happened during
evaluation of constructor JFrame() using arguments {}. java.lang.NullPointerException
at java.beans.MethodRef.get(MethodRef.java:72)
at java.beans.PropertyDescriptor.getWriteMethod(PropertyDescriptor.java:270)
org.eclipse.wb.internal.core.utils.exception.DesignerException: 313 (Exception during 'super' constructor evaluation). JFrame() {} java.lang.NullPointerException
at java.beans.MethodRef.get(MethodRef.java:72)
at java.beans.PropertyDescriptor.getWriteMethod(PropertyDescriptor.java:270)
at org.eclipse.wb.internal.core.model.creation.ThisCreationSupport.create(ThisCreationSupport.java:275)
at org.eclipse.wb.internal.core.model.JavaInfoEvaluationHelper.evaluateJavaInfoUsingCreationSupport(JavaInfoEvaluationHelper.java:642)
at org.eclipse.wb.internal.core.parser.JavaInfoParser.addJavaInfo(JavaInfoParser.java:1261)
at org.eclipse.wb.internal.core.parser.JavaInfoParser.parse(JavaInfoParser.java:253)
at org.eclipse.wb.internal.core.parser.JavaInfoParser.access$9(JavaInfoParser.java:238)
at org.eclipse.wb.internal.core.parser.JavaInfoParser$1.runObject(JavaInfoParser.java:153)
at org.eclipse.wb.internal.core.parser.JavaInfoParser$1.runObject(JavaInfoParser.java:1)
at org.eclipse.wb.internal.core.utils.execution.ExecutionUtils.runDesignTime(ExecutionUtils.java:159)
at org.eclipse.wb.internal.core.parser.JavaInfoParser.parse(JavaInfoParser.java:151)
at org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF(DesignPage.java:534)
at org.eclipse.wb.internal.core.editor.DesignPage.access$9(DesignPage.java:522)
at org.eclipse.wb.internal.core.editor.DesignPage$8$1.run(DesignPage.java:449)
at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:187)
at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:156)
at org.eclipse.swt.widgets.Display.syncExec(Display.java:4622)
at org.eclipse.wb.internal.core.editor.DesignPage$8.run(DesignPage.java:446)
at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:466)
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:374)
at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:527)
at org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF_withProgress(DesignPage.java:465)
at org.eclipse.wb.internal.core.editor.DesignPage.internal_refreshGEF(DesignPage.java:415)
at org.eclipse.wb.internal.core.editor.UndoManager.refreshDesignerEditor(UndoManager.java:381)
at org.eclipse.wb.internal.core.editor.UndoManager.activate(UndoManager.java:90)
at org.eclipse.wb.internal.core.editor.DesignPage.handleActiveState_True(DesignPage.java:263)
at org.eclipse.wb.internal.core.editor.DesignPage.handleActiveState(DesignPage.java:241)
at org.eclipse.wb.internal.core.editor.multi.DefaultMultiMode.showPage(DefaultMultiMode.java:125)
at org.eclipse.wb.internal.core.editor.multi.DefaultMultiMode$1.widgetSelected(DefaultMultiMode.java:63)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:248)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4486)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1388)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1412)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1397)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1182)
at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:3110)
at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1794)
at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:283)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4486)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1388)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3831)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3441)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:382)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:236)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)
at org.eclipse.equinox.launcher.Main.run(Main.java:1465)
Caused by: java.lang.NullPointerException
at java.beans.MethodRef.get(MethodRef.java:72)
at java.beans.PropertyDescriptor.getWriteMethod(PropertyDescriptor.java:270)
at org.eclipse.wb.internal.core.model.JavaInfoUtils.addExposedChildred_Method(JavaInfoUtils.java:447)
at org.eclipse.wb.internal.core.model.JavaInfoUtils.addExposedChildren(JavaInfoUtils.java:429)
at org.eclipse.wb.internal.swing.model.component.ComponentInfo.createExposedChildren(ComponentInfo.java:109)
at org.eclipse.wb.internal.swing.model.component.ContainerInfo.createExposedChildren(ContainerInfo.java:143)
at org.eclipse.wb.core.model.JavaInfo.initialize(JavaInfo.java:423)
at org.eclipse.wb.internal.swing.model.component.ContainerInfo.initialize(ContainerInfo.java:114)
at org.eclipse.wb.core.model.JavaInfo.setObject(JavaInfo.java:1288)
at org.eclipse.wb.internal.core.model.creation.ThisCreationSupport.create(ThisCreationSupport.java:269)
Questo è il codice della jframe incriminata, ma è tutto generato in automatico
Codice: Seleziona tutto
package boundary;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
public class FormInserisciProdotto extends JFrame {
private JPanel contentPane;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
FormInserisciProdotto frame = new FormInserisciProdotto();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public FormInserisciProdotto() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(new BorderLayout(0, 0));
setContentPane(contentPane);
}
}