Java Utililty Methods JComboBox

List of utility methods to do JComboBox

  1. HOME
  2. Java
  3. J
  4. JComboBox

Description

The list of methods to do JComboBox are organized into topic(s).

Method

voidaddHorizontalScrollBar(JComboBox box)
add Horizontal Scroll Bar 
if (box.getItemCount() == 0)
    return;
Object comp = box.getUI().getAccessibleChild(box, 0);
if (!(comp instanceof JPopupMenu)) {
    return;
JPopupMenu popup = (JPopupMenu) comp;
int n = popup.getComponentCount();
...
voidaddToCombo(JComboBox combo, Iterator it)
This method automatically adds the contents of a data structured refered to by an iterator to a JComboBox instance. 
while (it.hasNext()) {
    combo.addItem(it.next());
voidaddToComboBox(JComboBox list, Object object)
add To Combo Box 
ComboBoxModel model = list.getModel();
if (model == null) {
    model = new DefaultComboBoxModel();
    list.setModel(model);
;
if (model instanceof DefaultComboBoxModel) {
    DefaultComboBoxModel listModel = (DefaultComboBoxModel) model;
...
voidadjustComboBoxHeight(JComboBox comboBox)
adjust Combo Box Height 
if (comboBox == null) {
    return;
Font font = (Font) UIManager.getDefaults().get("ComboBox.font");
if (comboBox != null && font != null) {
    Dimension uiSize = comboBox.getUI().getPreferredSize(comboBox);
    FontMetrics fontMetrics = comboBox.getFontMetrics(font);
    int height = fontMetrics.getHeight() + fontMetrics.getDescent() + 3;
...
voidadjustPopupWidth(JComboBox comboBox)
Adjust popup for combo box, so that horizontal scrollbar will not display. 
voidadjustSize(JComboBox comboBox)
adjust Size

comboBox.setPreferredSize(new Dimension(0, FIELD_HEIGHT));

voidapplyDefaultProperties(final JComboBox comp)
Sets default background and foreground color as well as a default font for the specified component. 

if (comp == null) {
    return;
applyProperties(comp, "ComboBox.background", 
        "ComboBox.foreground", 
        "ComboBox.font"); 

voidCargarComboBox(JComboBox cb, List lista)
Cargar Combo Box

Vector<T> v = new Vector<T>();
for (T p : lista) {
    v.add(p);
cb.setModel(new DefaultComboBoxModel<T>(v));

voidcheckJComboBoxNotEmpty(javax.swing.JComboBox combo, javax.swing.JLabel promptName, ArrayList errors)
check J Combo Box Not Empty

if (!isJComboBoxNotEmpty(combo))
    errors.add(promptName.getText());

voidcomboBoxScroll(JComboBox box)
combo Box Scroll

if (box == null) {
    return;
Object comp = box.getUI().getAccessibleChild(box, 0);
if (!(comp instanceof JPopupMenu)) {
    return;
JPopupMenu popup = (JPopupMenu) comp;
...