AutoComplete SwingX

import java.awt.Color;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.util.Collection;
import java.util.Vector;

import javax.swing.ComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.UIManager;
import javax.swing.text.JTextComponent;

public class AutoCompleteComboBox extends JComboBox
{
    public AutoCompleteComboBox()
    {
        super();
        initialize(false);
    }

    public AutoCompleteComboBox(ComboBoxModel aModel)
    {
        super(aModel);
        initialize(false);
    }

    public AutoCompleteComboBox(Object... items)
    {
        super(items);
        initialize(false);
    }

    public AutoCompleteComboBox(Collection< ? > items)
    {
        super(new Vector<Object>(items));
        initialize(false);
    }

    public AutoCompleteComboBox(boolean editable)
    {
        super();
        initialize(editable);
    }

    public AutoCompleteComboBox(ComboBoxModel aModel, boolean editable)
    {
        super(aModel);
        initialize(editable);
    }

    public AutoCompleteComboBox(Collection< ? > items, boolean editable)
    {
        super(new Vector<Object>(items));
        initialize(editable);
    }

    private void initialize(boolean editable)
    {
        setEditable(editable);

        AutoCompleteDecorator.decorate(this);
        final Color gray = getBackground();
        final Color green = UIManager.getColor("ComboBox.selectionBackground");
        // final Color selection = ((JTextComponent)
        // getEditor().getEditorComponent()).getSelectionColor();

        getEditor().getEditorComponent().setBackground(gray);
        ((JTextComponent) getEditor().getEditorComponent()).setSelectionColor(gray);
        ((JTextComponent) getEditor().getEditorComponent()).setCaretColor(Color.white);
        ((JTextComponent) getEditor().getEditorComponent()).setForeground(((JTextComponent) getEditor().getEditorComponent()).getSelectedTextColor());

        getEditor().getEditorComponent().addFocusListener(new FocusListener()
        {
            public void focusGained(FocusEvent e)
            {
                getEditor().getEditorComponent().setBackground(green);
                ((JTextComponent) getEditor().getEditorComponent()).setSelectionColor(green);
            }

            public void focusLost(FocusEvent e)
            {
                getEditor().getEditorComponent().setBackground(gray);
                ((JTextComponent) getEditor().getEditorComponent()).setSelectionColor(gray);
            }
        });
    }

    @Override
    public void setEnabled(boolean b)
    {
        super.setEnabled(b);
        getEditor().getEditorComponent().setBackground(getBackground());
    }
}

import java.awt.event.ActionEvent;
import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import javax.swing.Action;
import javax.swing.ActionMap;
import javax.swing.ComboBoxEditor;
import javax.swing.InputMap;
import javax.swing.JComboBox;
import javax.swing.KeyStroke;
import javax.swing.UIManager;
import javax.swing.text.DefaultEditorKit;
import javax.swing.text.JTextComponent;
import javax.swing.text.TextAction;

import org.jdesktop.swingx.autocomplete.AbstractAutoCompleteAdaptor;
import org.jdesktop.swingx.autocomplete.AutoCompleteComboBoxEditor;
import org.jdesktop.swingx.autocomplete.AutoCompleteDocument;
import org.jdesktop.swingx.autocomplete.ComboBoxAdaptor;
import org.jdesktop.swingx.autocomplete.ObjectToStringConverter;
import org.jdesktop.swingx.autocomplete.workarounds.AquaLnFPopupLocationFix;

/**
 * This class contains only static utility methods that can be used to set up
 * automatic completion for some Swing components.
 * <p>
 * Usage examples:
 * </p>
 * <p>
 * 
 * &lt;pre&gt;&lt;code&gt;
 * JComboBox comboBox = [...];
 * AutoCompleteDecorator.&lt;b&gt;decorate&lt;/b&gt;(comboBox);
 * 
 * List items = [...];
 * JTextField textField = [...];
 * AutoCompleteDecorator.&lt;b&gt;decorate&lt;/b&gt;(textField, items);
 * 
 * JList list = [...];
 * JTextField textField = [...];
 * AutoCompleteDecorator.&lt;b&gt;decorate&lt;/b&gt;(list, textField);
 * &lt;/code&gt;&lt;/pre&gt;
 * 
 * </p>
 * 
 * @author Thomas Bierhance
 */
public class AutoCompleteDecorator
{

    /**
     * Enables automatic completion for the given JComboBox. The automatic
     * completion will be strict (only items from the combo box can be selected)
     * if the combo box is not editable.
     * 
     * @param comboBox a combo box
     */
    public static void decorate(final JComboBox comboBox)
    {
        decorate(comboBox, ObjectToStringConverter.DEFAULT_IMPLEMENTATION);
    }

    /**
     * Enables automatic completion for the given JComboBox. The automatic
     * completion will be strict (only items from the combo box can be selected)
     * if the combo box is not editable.
     * 
     * @param comboBox a combo box
     * @param stringConverter the converter used to transform items to strings
     */
    public static void decorate(final JComboBox comboBox,
            final ObjectToStringConverter stringConverter)
    {
        boolean strictMatching = !comboBox.isEditable();
        // has to be editable
        comboBox.setEditable(true);
        // fix the popup location
        AquaLnFPopupLocationFix.install(comboBox);

        // configure the text component=editor component
        JTextComponent editorComponent = (JTextComponent) comboBox.getEditor().getEditorComponent();
        final AbstractAutoCompleteAdaptor adaptor = new ComboBoxAdaptor(
                comboBox);
        final AutoCompleteDocument document = new AutoCompleteDocument(adaptor,
                strictMatching, stringConverter);
        decorate(editorComponent, document, adaptor);

        // show the popup list when the user presses a key
        final KeyListener keyListener = new KeyAdapter()
        {
            @Override
            public void keyPressed(KeyEvent keyEvent)
            {
                // don't popup on action keys (cursor movements, etc...)
                if (keyEvent.isActionKey())
                    return;
                // don't popup if the combobox isn't visible anyway
                if (comboBox.isDisplayable() && !comboBox.isPopupVisible())
                {
                    int keyCode = keyEvent.getKeyCode();
                    // don't popup when the user hits shift,ctrl or alt
                    if (keyCode == KeyEvent.VK_SHIFT
                            || keyCode == KeyEvent.VK_CONTROL
                            || keyCode == KeyEvent.VK_ALT)
                        return;
                    // don't popup when the user hits escape (see issue #311)
                    if (keyCode == KeyEvent.VK_ESCAPE
                            || keyCode == KeyEvent.VK_ENTER)
                        return;

                    if (keyEvent.isAltDown() || keyEvent.isControlDown())
                        return;

                    comboBox.setPopupVisible(true);
                }
            }
        };
        editorComponent.addKeyListener(keyListener);

        if (stringConverter != ObjectToStringConverter.DEFAULT_IMPLEMENTATION)
        {
            comboBox.setEditor(new AutoCompleteComboBoxEditor(
                    comboBox.getEditor(), stringConverter));
        }

        // Changing the l&f can change the combobox' editor which in turn
        // would not be autocompletion-enabled. The new editor needs to be
        // set-up.
        comboBox.addPropertyChangeListener("editor",
                new PropertyChangeListener()
                {
                    public void propertyChange(PropertyChangeEvent e)
                    {
                        ComboBoxEditor editor = (ComboBoxEditor) e.getNewValue();
                        if (editor != null
                                && editor.getEditorComponent() != null)
                        {
                            if (!(editor instanceof AutoCompleteComboBoxEditor)
                                    && stringConverter != ObjectToStringConverter.DEFAULT_IMPLEMENTATION)
                            {
                                comboBox.setEditor(new AutoCompleteComboBoxEditor(
                                        editor, stringConverter));
                                // Don't do the decorate step here because
                                // calling setEditor will trigger
                                // the propertychange listener a second time,
                                // which will do the decorate
                                // and addKeyListener step.
                            }
                            else
                            {
                                decorate(
                                        (JTextComponent) editor.getEditorComponent(),
                                        document, adaptor);
                                editor.getEditorComponent().addKeyListener(
                                        keyListener);
                            }
                        }
                    }
                });
    }

    /**
     * Decorates a given text component for automatic completion using the given
     * AutoCompleteDocument and AbstractAutoCompleteAdaptor.
     * 
     * @param textComponent a text component that should be decorated
     * @param document the AutoCompleteDocument to be installed on the text
     *        component
     * @param adaptor the AbstractAutoCompleteAdaptor to be used
     */
    public static void decorate(JTextComponent textComponent,
            AutoCompleteDocument document,
            final AbstractAutoCompleteAdaptor adaptor)
    {
        // install the document on the text component
        textComponent.setDocument(document);

        // mark entire text when the text component gains focus
        // otherwise the last mark would have been retained which is quiet
        // confusing
        textComponent.addFocusListener(new FocusAdapter()
        {
            @Override
            public void focusGained(FocusEvent e)
            {
                adaptor.markEntireText();
            }
        });

        // Tweak some key bindings
        InputMap editorInputMap = textComponent.getInputMap();
        if (document.isStrictMatching())
        {
            // move the selection to the left on VK_BACK_SPACE
            editorInputMap.put(KeyStroke.getKeyStroke(
                    java.awt.event.KeyEvent.VK_BACK_SPACE, 0),
                    DefaultEditorKit.selectionBackwardAction);
            // ignore VK_DELETE and CTRL+VK_X and beep instead when strict
            // matching
            editorInputMap.put(KeyStroke.getKeyStroke(
                    java.awt.event.KeyEvent.VK_DELETE, 0), errorFeedbackAction);
            editorInputMap.put(KeyStroke.getKeyStroke(
                    java.awt.event.KeyEvent.VK_X,
                    java.awt.event.InputEvent.CTRL_DOWN_MASK),
                    errorFeedbackAction);
        }
        else
        {
            ActionMap editorActionMap = textComponent.getActionMap();
            // leave VK_DELETE and CTRL+VK_X as is
            // VK_BACKSPACE will move the selection to the left if the selected
            // item is in the list
            // it will delete the previous character otherwise
            editorInputMap.put(KeyStroke.getKeyStroke(
                    java.awt.event.KeyEvent.VK_BACK_SPACE, 0),
                    "nonstrict-backspace");
            editorActionMap.put(
                    "nonstrict-backspace",
                    new NonStrictBackspaceAction(
                            editorActionMap.get(DefaultEditorKit.deletePrevCharAction),
                            editorActionMap.get(DefaultEditorKit.selectionBackwardAction),
                            adaptor));
        }
    }

    static class NonStrictBackspaceAction extends TextAction
    {
        Action backspace;
        Action selectionBackward;
        AbstractAutoCompleteAdaptor adaptor;

        public NonStrictBackspaceAction(Action backspace,
                Action selectionBackward, AbstractAutoCompleteAdaptor adaptor)
        {
            super("nonstrict-backspace");
            this.backspace = backspace;
            this.selectionBackward = selectionBackward;
            this.adaptor = adaptor;
        }

        public void actionPerformed(ActionEvent e)
        {
            if (adaptor.listContainsSelectedItem())
            {
                selectionBackward.actionPerformed(e);
            }
            else
            {
                backspace.actionPerformed(e);
            }
        }
    }

    /**
     * A TextAction that provides an error feedback for the text component that
     * invoked the action. The error feedback is most likely a "beep".
     */
    static Object errorFeedbackAction = new TextAction("provide-error-feedback")
    {
        public void actionPerformed(ActionEvent e)
        {
            UIManager.getLookAndFeel().provideErrorFeedback(getTextComponent(e));
        }
    };
}

import org.jdesktop.swingx.autocomplete.workarounds.AquaLnFPopupLocationFix;

// formata a combo
private void decoraComboContrib(){
        grafica.ClasseAutoComplete.decorate(ComboContrib);
    }


 //preenche a combo
    private void ComboContrib(){
        Object codSituacao,nomeSituacoes;
        conn.executeSQL("SELECT s.id_situacao,s.nome_situacoes"
                       +" FROM SITUACOES s ORDER BY id_situacao");
        try {
            ComboContrib.addItem("Selecione");
            while (conn.resultset.next()) {
                codSituacao = conn.resultset.getInt("id_situacao");
                nomeSituacoes = conn.resultset.getString("nome_situacoes");
                ComboContrib.addItem(nomeSituacoes);
            }
        } catch (SQLException ex) {
            Logger.getLogger(NovoServico.class.getName()).log(Level.SEVERE, null, ex);
        }
    }