void (@NotNull AnActionEvent e) { final Project project = e.getData(CommonDataKeys.PROJECT); assert project != null; final Editor editor = e.getData(CommonDataKeys.EDITOR); assert editor != null; final int offset = editor.getCaretModel().getOffset(); final PsiFile file = PsiDocumentManager.getInstance(project).getPsiFile(editor.getDocument()); PsiClass psiClass = PsiTreeUtil.getParentOfType(file.findElementAt(offset), PsiClass.class); assert psiClass != null; if (!PsiUtil.hasDefaultConstructor(psiClass)) { Messages.showMessageDialog(project, UIDesignerBundle.message("generate.main.no.default.constructor"), UIDesignerBundle.message("generate.main.title"), Messages.getErrorIcon()); return; } final List<PsiFile> boundForms = FormClassIndex.findFormsBoundToClass(project, psiClass.getQualifiedName()); final LwRootContainer rootContainer; try { rootContainer = Utils.getRootContainer(boundForms.get(0).getText(), null); } catch (AlienFormFileException ex) { Messages.showMessageDialog(project, UIDesignerBundle.message("generate.main.not.valid.form"), UIDesignerBundle.message("generate.main.title"), Messages.getErrorIcon()); return; } catch (Exception ex) { LOG.error(ex); return; } if (rootContainer.getComponentCount() == 0) { Messages.showMessageDialog(project, UIDesignerBundle.message("generate.main.empty.form"), UIDesignerBundle.message("generate.main.title"), Messages.getErrorIcon()); return; } String rootBinding = rootContainer.getComponent(0).getBinding(); if (rootBinding == null || psiClass.findFieldByName(rootBinding, true) == null) { Messages.showMessageDialog(project, UIDesignerBundle.message("generate.main.no.root.binding"), UIDesignerBundle.message("generate.main.title"), Messages.getErrorIcon()); return; } @NonNls final StringBuilder mainBuilder = new StringBuilder("public static void main(String[] args) { "); final JavaCodeStyleManager csm = JavaCodeStyleManager.getInstance(project); SuggestedNameInfo nameInfo = csm.suggestVariableName(VariableKind.LOCAL_VARIABLE, "frame", null, null); String varName = nameInfo.names [0]; mainBuilder.append(JFrame.class.getName()).append(" ").append(varName).append("= new ").append(JFrame.class.getName()); mainBuilder.append("(\"").append(psiClass.getName()).append("\");"); mainBuilder.append(varName).append(".setContentPane(new ").append(psiClass.getQualifiedName()).append("().").append(rootBinding).append(");"); mainBuilder.append(varName).append(".setDefaultCloseOperation(").append(JFrame.class.getName()).append(".EXIT_ON_CLOSE);"); mainBuilder.append(varName).append(".pack();"); mainBuilder.append(varName).append(".setVisible(true);"); mainBuilder.append("}\n"); CommandProcessor.getInstance().executeCommand(project, () -> ApplicationManager.getApplication().runWriteAction(() -> { try { PsiMethod method = JavaPsiFacade.getInstance(file.getProject()).getElementFactory().createMethodFromText(mainBuilder.toString(), file); List<PsiGenerationInfo<PsiMethod>> infos = Collections.singletonList(new PsiGenerationInfo<>(method)); List<PsiGenerationInfo<PsiMethod>> resultMembers = GenerateMembersUtil.insertMembersAtOffset(file, offset, infos); resultMembers.get(0).positionCaret(editor, false); } catch (IncorrectOperationException e1) { LOG.error(e1); } }), null, null); }