我想在MethodDeclaration块中创建一个像这样的
SystemConfig config =new SystemConfig();
以下是我正在尝试的代码，但收到错误“java.lang.IllegalArgumentException”。
VariableDeclarationFragment newDeclFrag= ast.newVariableDeclarationFragment();
newDeclFrag.setName(ast.newSimpleName("config"));
ClassInstanceCreation systemClass = ast.newClassInstanceCreation();
critterClass.setType(ast.newSimpleType(ast.newSimpleName("SystemConfig")));
newDeclFrag.setInitializer(systemClass);
System.out.println("variable dec =********** "+newDeclFrag.toString());
VariableDeclarationStatement statementConfig = ast.newVariableDeclarationStatement(newDeclFrag);
block.statements().add(statementConfig);
任何人都可以提供帮助，如何在方法声明块中声明变量。
输出 -
variable dec =********** config=new SystemConfig()
错误
org.eclipse.e4.core.di.InjectionException: java.lang.IllegalArgumentException
at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:63)
at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:231)
at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:212)
at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:131)
at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:171)
at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.executeItem(HandledContributionItem.java:831)
at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.handleWidgetSelection(HandledContributionItem.java:724)
at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.access$7(HandledContributionItem.java:708)
at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem$4.handleEvent(HandledContributionItem.java:647)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4169)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3758)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1053)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:942)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:588)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
at org.eclipse.equinox.launcher.Main.main(Main.java:1414)
Caused by: java.lang.IllegalArgumentException
at org.eclipse.jdt.core.dom.ASTNode.checkNewChild(ASTNode.java:1905)
at org.eclipse.jdt.core.dom.ASTNode$NodeList.add(ASTNode.java:1269)
at java.util.AbstractList.add(Unknown Source)
at org.eclipse.jdt.core.dom.AST.newVariableDeclarationStatement(AST.java:2420)
at plugindemo.InitializationCodeParser.createMethodDeclaration(InitializationCodeParser.java:213)
at plugindemo.InitializationCodeParser.add(InitializationCodeParser.java:97)
at com.accenture.plugin.actions.CrittercismViewHandler.execute(CrittercismViewHandler.java:59)
at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:290)
at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:76)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56)
... 34 more
答案 0 :(得分：0)
定义“SystemConfig config = new SystemConfig（）;”的正确方法是：