Java Utililty Methods JComboBox

List of utility methods to do JComboBox

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Description

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

Method

booleanisEmptyStr(javax.swing.JComboBox input)
Check if the JComboBox selection is empty 
String str = (String) input.getSelectedItem();
return str == null || "".equals(str.trim());
booleanisJComboBoxNotEmpty(javax.swing.JComboBox combo)
is J Combo Box Not Empty 
return !((String) combo.getSelectedItem()).trim().isEmpty();
booleanlargeThan(javax.swing.JComboBox input, double x)
Check if the JComboBox input is larger than x 
double d = new Double((String) (input.getSelectedItem())).doubleValue();
if (d > x)
    return true;
return false;
voidloadComboBox(JComboBox combo, List list)
load Combo Box 
loadComboBox(combo, list, true);
voidloadEnum(JComboBox combo, Class c, boolean removeAll)
load Enum 
if (removeAll) {
    combo.removeAllItems();
for (E e : c.getEnumConstants()) {
    combo.addItem(e);
voidloadPrefs(Preferences prefs, String prefKey, JComboBox combo)
load Prefs 
DefaultComboBoxModel comboModel = new DefaultComboBoxModel();
String recents = prefs.get(prefKey, null);
if (recents != null) {
    StringTokenizer st = new StringTokenizer(recents, DELIMITER);
    while (st.hasMoreTokens()) {
        comboModel.addElement(st.nextToken());
combo.setModel(comboModel);
JComboBoxmakeJComboBox(ResourceBundle resource, String panelName, String keyword)
make J Combo Box 
String value = null;
try {
    value = resource.getString(panelName + "_COMBOBOX_" + keyword + "_DEFAULT");
} catch (MissingResourceException e) {
JComboBox<String> jcb = new JComboBox<>();
String val = null;
int ii = 0;
...
voidmakeSquare(JComboBox... comboBoxes)
Sets the given combo boxes to appear in the square style. 
for (JComboBox<?> comboBox : comboBoxes) {
    comboBox.putClientProperty("JComboBox.isSquare", true);
JComboBoxnewCombo(int chars)
new Combo 
StringBuilder sb = new StringBuilder(chars);
while (chars-- > 0)
    sb.append("X");
JComboBox<String> combo = new JComboBox<String>();
combo.setPrototypeDisplayValue(sb.toString());
return combo;
voidprepareComboBox(JComboBox comboBox, Dimension size, int min, int max, int[] list)
prepares comboBox control 
comboBox.setLayout(null);
comboBox.setSize(size);
comboBox.setFont(fontComboBox);
comboBox.removeAllItems();
for (; min <= max; min++) {
    comboBox.addItem(min);
if (list != null) {
...