import com.intellij.ide.util.TreeJavaClassChooserDialog; //导入依赖的package包/类
public static String chooseClass(Project project, String initialValue)
{
   PsiManager psiManager = PsiManager.getInstance(project);

   TreeClassChooser chooser = new TreeJavaClassChooserDialog(
            "Select a Java class",
            project,
            GlobalSearchScope.allScope(project),
            null,
            ClassUtil.findPsiClass(psiManager, initialValue));
   chooser.showDialog();

   PsiClass psiClass = chooser.getSelected();

   return psiClass != null ? psiClass.getQualifiedName() : (initialValue.isEmpty() ? null : initialValue);
}
 

import com.intellij.ide.util.TreeJavaClassChooserDialog; //导入依赖的package包/类
@Nullable
protected JComponent createCenterPanel(){
    final JPanel panel = new JPanel(new GridBagLayout());

    final GridBagConstraints gbConstraints = new GridBagConstraints();
    gbConstraints.fill = GridBagConstraints.HORIZONTAL;
    gbConstraints.weightx = 1.0;
    gbConstraints.weighty = 0.0;
    gbConstraints.gridwidth = 1;
    gbConstraints.gridx = 0;
    gbConstraints.gridy = 0;
    gbConstraints.insets = new Insets(0, 0, 0, 0);
    final JPanel classNamePanel = new JPanel(new BorderLayout());

    final JLabel label1 = new JLabel("Provider Class Name:");
    providerNameField = new JTextField();
    providerNameField.getDocument().addDocumentListener(this);
    label1.setDisplayedMnemonic('P');
    label1.setLabelFor(providerNameField);
    classNamePanel.add(label1, BorderLayout.WEST);
    classNamePanel.add(providerNameField, BorderLayout.CENTER);
    panel.add(classNamePanel, gbConstraints);

    providedClassField = new JTextField();
    providedClassField.getDocument().addDocumentListener(this);
    classChooserButton = new FixedSizeButton(providedClassField);
    classChooserButton.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
            final GlobalSearchScope scope = GlobalSearchScope.allScope(project);
            final TreeClassChooser chooser = new TreeJavaClassChooserDialog(
                    GuiceyIDEABundle.message("select.provided.class"), project, scope, null, null);
            final String classText = classChooserButton.getText();
            final PsiClass currentClass =
                    JavaPsiFacade.getInstance(project).findClass(classText, GlobalSearchScope.allScope(project));
            if(currentClass != null){
                chooser.select(currentClass);
            }
            chooser.showDialog();
            final PsiClass selectedClass = chooser.getSelected();
            if(selectedClass != null){
                final String className = selectedClass.getQualifiedName();
                providedClassField.setText(className);
                validateButtons();
            }
        }
    });
    panel.add(classChooserButton, gbConstraints);
    final JPanel existingClassPanel = new JPanel(new BorderLayout());
    final JLabel label2 = new JLabel("Class Provided:");
    label2.setLabelFor(providedClassField);
    label2.setDisplayedMnemonic('C');
    existingClassPanel.add(label2, BorderLayout.WEST);
    existingClassPanel.add(providedClassField, BorderLayout.CENTER);
    existingClassPanel.add(classChooserButton, BorderLayout.EAST);
    gbConstraints.gridx = 0;
    gbConstraints.gridy = 1;
    gbConstraints.gridwidth = 3;
    panel.add(existingClassPanel, gbConstraints);
    return panel;
}