Olá amigos ja estou a varios dias e naum consigo resolver este problema, até parece ser algo simples, no entanto, naum consigo resolver. Estou tentando pegar o valor selecionado de uma combo e iniciar uma variavel para poder colocar dentro de um metodo e depois chamar esse metodo , no entanto gera java.lang.NullPointerException, ja não sei mais o que fazer, revirei o google atras de exemplos, javadoc e etc… Coloquei o codigo e a stack que gera. Espero q possam me ajudar a parar de dar esse erro. :oops:
// metodo para criar arquivo xml dentro de um pacote ja existente
public void gerarArquivoXMLPage4() {
try {
File arquivo = new File(
"C:/FDDK/runtime-EclipseApplication/Extrator/src/"
+ FreeDecisionWizardPage2.getCliente() + "/"
+ FreeDecisionWizardPage2.getFabricante() + "/"
+ FreeDecisionWizardPage2.getProduto() + "/"
+ FreeDecisionWizardPage2.getAreanegocio() + "/"
+ FreeDecisionWizardPage2.Extrator() + ".xml");
if (!arquivo.exists())
arquivo.createNewFile();
writer = new PrintWriter(new FileWriter(arquivo));
escreveClassepage4();// aqui eu chamo o metodo para escrever os dados do XML
} catch (Exception ex) {
ex.printStackTrace();
}
}
// metodo para escrever os dados do xml
public void escreveClassepage4() {
String Banco = txtBanco.getText();// pegando o nome do banco na tela
Driver = comboDriver.getText();// aqui gera java.lang.NullPointerException
//setDriver(comboDriver.getText());
String URL = comboURL.getText();
//setURL(comboURL.getText());
String Usuario = txtUser.getText();
String Senha = txtSenha.getText();
String Schema = txtSchema.getText();
String Cache = txtCache.getText();
String Read = comboRead.getText();
//setRead(comboRead.getText());
//escrevendo os dados do xml
writer.write("<Connection name=" + '"' + Banco + '"'
+ " jdbcDriver=" + '"' + Driver + '"' + "\n ");
writer.write("jdbcUrl=" + '"' + URL + '"' + " jdbcUser=" + '"'
+ Usuario + '"' + "\n");
writer.write("jdbcPassword=" + '"' + Senha + '"' + " schemaName=" + '"'
+ Schema + " " + '"' + " readOnly=" + '"' + Read + '"'
+ " cacheSize=" + '"' + Cache + '"' + "/>\n\n");
writer.write("<Parameters>\n");
writer.write("<Item name=" + '"' + "data_ini" + '"'
+ ">01/01/1901</Item>\n");
writer.write("</Parameters>");
writer.write("</Configuration>");
writer.close();
}
E aqui a Stack:
java.lang.NullPointerException
at freedecision.wizard.FreeDecisionWizardPage4.escreveClassepage4(FreeDecisionWizardPage4.java:318)
at freedecision.wizard.FreeDecisionWizardPage4.gerarArquivoXMLPage4(FreeDecisionWizardPage4.java:308)
at freedecision.wizard.FreeDecisionWizard.performFinish(FreeDecisionWizard.java:46)
at org.eclipse.jface.wizard.WizardDialog.finishPressed(WizardDialog.java:742)
at org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDialog.java:373)
at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:624)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:228)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3823)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3422)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)
at org.eclipse.jface.window.Window.open(Window.java:801)
at freedecision.wizard.RunWizardAction.run(RunWizardAction.java:51)
at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:251)
at org.eclipse.ui.internal.WWinPluginAction.runWithEvent(WWinPluginAction.java:229)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:583)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:500)
at org.eclipse.jface.action.ActionContributionItem$6.handleEvent(ActionContributionItem.java:452)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3823)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3422)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2382)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2346)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2198)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:493)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:488)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:382)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)
at org.eclipse.equinox.launcher.Main.run(Main.java:1236)
at org.eclipse.equinox.launcher.Main.main(Main.java:1212)
