下面列出了javax.swing.JComboBox#getItemAt ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
@SuppressWarnings("unchecked")
private void setEncoding(Charset encoding) throws Exception {
JComboBox<Charset> encodingOptions =
(JComboBox<Charset>) findComponentByName(pane, "Encoding Options", false);
// Makes encoding UTF_16 in case encoding is UTF_16BE or UTF_16LE
// BE and LE are not choices in the combo box.
if (encoding == StandardCharsets.UTF_16BE || encoding == StandardCharsets.UTF_16LE) {
encoding = StandardCharsets.UTF_16;
}
for (int i = 0; i < encodingOptions.getItemCount(); i++) {
if (encodingOptions.getItemAt(i) == encoding) {
int index = i;
runSwing(() -> encodingOptions.setSelectedIndex(index));
break;
}
}
}
/**
* Searches LayerItemPresenter combobox by the item's display name.
*/
private static String searchLIPCategoryCombo(final JComboBox lpCombo, final String displayName) {
String path = null;
for (int i = 0; i < lpCombo.getItemCount(); i++) {
Object item = lpCombo.getItemAt(i);
if (!(item instanceof LayerItemPresenter)) {
continue;
}
LayerItemPresenter presenter = (LayerItemPresenter) lpCombo.getItemAt(i);
if (displayName.equals(presenter.getDisplayName())) {
path = presenter.getFullPath();
break;
}
}
return path;
}
public void testComboboxWithDrivers() throws Exception {
setUpDrivers();
JComboBox combo = new JComboBox();
DatabaseExplorerInternalUIs.connect(combo, JDBCDriverManager.getDefault());
assertEquals(3, combo.getItemCount());
JdbcUrl url = (JdbcUrl)combo.getItemAt(0);
assertDriversEqual(driver2, url.getDriver());
assertEquals(driver2.getClassName(), url.getClassName());
assertEquals(driver2.getDisplayName(), url.getDisplayName());
url = (JdbcUrl)combo.getItemAt(1);
assertDriversEqual(driver1, url.getDriver());
assertEquals(driver1.getClassName(), url.getClassName());
assertEquals(driver1.getDisplayName(), url.getDisplayName());
}
/**
* Returns information about component.
*/
@Override
public Hashtable<String, Object> getDump() {
Hashtable<String, Object> result = super.getDump();
JComboBox<?> jComboBox = (JComboBox<?>) getSource();
Object selectedItem = jComboBox.getSelectedItem();
if (selectedItem != null) {
result.put(TEXT_DPROP, selectedItem.toString());
}
int itemCount = jComboBox.getItemCount();
String[] items = new String[itemCount];
for (int i = 0; i < itemCount; i++) {
if (jComboBox.getItemAt(i) != null) {
items[i] = jComboBox.getItemAt(i).toString();
}
}
addToDump(result, ITEM_PREFIX_DPROP, items);
return result;
}
/**
* Load combobox with DB connection
*
* @param file
* @param dbConComboBox
*/
public static void loadConnection(ModelerFile file, JComboBox dbConComboBox) {
EntityMappings entityMappings = (EntityMappings) file.getDefinitionElement();
Cache cache = entityMappings.getCache();
DatabaseConnectionCache dbCache = cache.getDatabaseConnectionCache();
DatabaseExplorerUIs.connect(dbConComboBox, ConnectionManager.getDefault());
dbConComboBox.setToolTipText("Available Database Connection");
for (int i = 0; i < dbConComboBox.getItemCount(); i++) {
Object item = dbConComboBox.getItemAt(i);
if (dbCache != null && item instanceof DatabaseConnection && ((DatabaseConnection) item).getDatabaseURL().equals(dbCache.getUrl())) {
dbConComboBox.setSelectedIndex(i);
break;
}
}
}
private void updateKeybindComboBoxes() {
Team curTeam = getCurrentTeam();
for (String name : curTeam.getNames()) {
ItemListener itemListener = nameToItemListenerMap.get(name);
JComboBox<Character> box = nameToKeybindComboboxMap.get(name);
box.removeItemListener(itemListener);
Character prevSelected = box.getItemAt(box.getSelectedIndex());
box.removeAllItems();
Character curBinding = curTeam.getBinding(name);
LinkedHashSet<Character> availableBindings = new LinkedHashSet<Character>(Arrays.asList(curBinding));
availableBindings.addAll(myData.getAllAvailableBindingsFor(name, curTeam));
for (Character ch : availableBindings) {
if (ch != null) {
box.addItem(ch);
}
}
box.setSelectedItem(prevSelected);
if (box.getSelectedIndex() < 0) {
LOG.warning(getString(KEY_NO_BINDINGS));
}
box.addItemListener(itemListener);
}
}
public void updateGroupByItems(int dragRow, int dropRow) {
MyRow drag_row = (MyRow) model.getObjectForRow(dragRow);
JComboBox groupByComboDrag = (JComboBox) ((DefaultCellEditor) table.getCellEditor(dragRow, 6)).getComponent();
MyRow drop_row = (MyRow) model.getObjectForRow(dropRow);
JComboBox groupByComboDrop = (JComboBox) ((DefaultCellEditor) table.getCellEditor(dropRow, 6)).getComponent();
String sDrag = (String) groupByComboDrag.getItemAt(0);
String sDrop = (String) groupByComboDrop.getItemAt(0);
if ("".equals(sDrag) && !sDrag.equals(sDrop)) {
groupByComboDrop.insertItemAt("", 0);
groupByComboDrag.removeItem("");
}
if ("".equals(sDrop) && !sDrop.equals(sDrag)) {
groupByComboDrag.insertItemAt("", 0);
groupByComboDrop.removeItem("");
}
}
/**
* Perform the task.
*/
@Override
public void run() {
synchronized(statsHandler) {
if (statsHandler.dataHolderMap.get(driver.getUuid()) != null) {
final ConnectionDataHolder cdh = statsHandler.dataHolderMap.remove(driver.getUuid());
if (cdh != null) cdh.close();
}
}
JComboBox<?> box = null;
while (statsHandler.getClientHandler().getServerListOption() == null) goToSleep(50L);
final JPPFClientConnection c = driver.getConnection();
synchronized(statsHandler) {
if (debugEnabled) log.debug("removing client connection " + c.getName() + " from driver combo box");
box = ((ComboBoxOption) statsHandler.getClientHandler().getServerListOption()).getComboBox();
final int count = box.getItemCount();
int idx = -1;
for (int i=0; i<count; i++) {
final Object o = box.getItemAt(i);
if (c.equals(o)) {
box.removeItemAt(i);
idx = i;
break;
}
}
if ((idx >= 0) && (box.getItemCount() > 0)) {
if ((statsHandler.getClientHandler().currentDriver == null) || c.equals(statsHandler.getClientHandler().currentDriver.getConnection())) {
final int n = Math.min(idx, box.getItemCount()-1);
final TopologyDriver item = (TopologyDriver) box.getItemAt(n);
statsHandler.getClientHandler().currentDriver = item;
box.setSelectedItem(item);
}
}
}
}
/**
* Sets the selected item in connection combo box.
*/
private void setSelectedConnection(){
DatabaseConnection connection = ProviderUtil.getConnection(persistenceUnit);
if (connection != null){
jdbcComboBox.setSelectedItem(connection);
} else {
// custom connection (i.e. connection not registered in netbeans)
Properties props = persistenceUnit.getProperties();
if (props != null){
Property[] properties = props.getProperty2();
String url = null;
ArrayList<Provider> providers = new ArrayList<Provider>();
JComboBox activeCB = providerCombo.isVisible() ? providerCombo : libraryComboBox;
for(int i=0; i<activeCB.getItemCount(); i++){
Object obj = activeCB.getItemAt(i);
if(obj instanceof Provider){
providers.add((Provider) obj);
}
}
Provider provider = ProviderUtil.getProvider(persistenceUnit, providers.toArray(new Provider[]{}));
for (int i = 0; i < properties.length; i++) {
String key = properties[i].getName();
if (provider.getJdbcUrl().equals(key)) {
url = properties[i].getValue();
break;
}
}
if (url == null) {
url = NbBundle.getMessage(PersistenceUnitPanel.class, "LBL_CustomConnection");//NOI18N
}
jdbcComboBox.addItem(url);
jdbcComboBox.setSelectedItem(url);
}
}
}
/**
* Bind Match Type option to a combo box.
*
* @param comboBox Combo box to control and display the match type. The
* model of the combo box can contain only items of type {@link MatchType}.
* {@link MatchType#LITERAL} and {@link MatchType#REGEXP} are mandatory in
* the model.
*
* @since api.search/1.11
*/
public void bindMatchTypeComboBox(@NonNull final JComboBox comboBox) {
Parameters.notNull("comboBox", comboBox); //NOI18N
boolean regexpFound = false, literalFound = false;
for (int i = 0; i < comboBox.getItemCount(); i++) {
if (comboBox.getItemAt(i) == MatchType.LITERAL) {
literalFound = true;
} else if (comboBox.getItemAt(i) == MatchType.REGEXP) {
regexpFound = true;
} else if (!(comboBox.getItemAt(i) instanceof MatchType)) {
throw new IllegalArgumentException("Model of the combo "//NOI18N
+ "box can contain only MatchType items"); //NOI18N
}
}
if (!(regexpFound && literalFound)) {
throw new IllegalArgumentException(
"At least MatchType.LITERAL and MatchType.REGEXP " //NOI18N
+ "must be contained in the combo box model."); //NOI18N
}
if (matchTypeComboBox != null) {
throw new IllegalStateException(
"Already bound with option MATCH_TYPE"); //NOI18N
}
this.matchTypeComboBox = comboBox;
comboBox.setEditable(false);
setMatchType(this.matchType); //update match type, check it is supported
comboBox.setSelectedItem(matchType);
comboBox.addItemListener(new ItemListener() {
@Override
public void itemStateChanged(ItemEvent e) {
setMatchType((MatchType) comboBox.getSelectedItem());
}
});
}
public void testComboboxWithDriversOfSameClass() throws Exception {
removeDrivers();
String name1 = "foo_driver";
String name2 = "foo_driver2";
String displayName1 = "FooDriver";
String displayName2 = "FooDriver2";
driver1 = JDBCDriver.create(name1, displayName1, "org.foo.FooDriver", new URL[0]);
JDBCDriverManager.getDefault().addDriver(driver1);
driver2 = JDBCDriver.create(name2, displayName2, "org.foo.FooDriver", new URL[0]);
JDBCDriverManager.getDefault().addDriver(driver2);
JComboBox combo = new JComboBox();
DatabaseExplorerInternalUIs.connect(combo, JDBCDriverManager.getDefault());
assertEquals(3, combo.getItemCount());
JdbcUrl url = (JdbcUrl)combo.getItemAt(0);
assertDriversEqual(driver1, url.getDriver());
assertEquals(driver1.getClassName(), url.getClassName());
assertEquals(driver1.getDisplayName(), url.getDisplayName());
assertEquals(driver1.getName(), url.getName());
url = (JdbcUrl)combo.getItemAt(1);
assertDriversEqual(driver2, url.getDriver());
assertEquals(driver2.getClassName(), url.getClassName());
assertEquals(driver2.getDisplayName(), url.getDisplayName());
assertEquals(driver2.getName(), url.getName());
}
public void testComboBoxWithDriverClass() throws Exception {
setUpDrivers();
JComboBox combo = new JComboBox();
DatabaseExplorerInternalUIs.connect(combo, JDBCDriverManager.getDefault(), "org.bar.BarDriver");
assertEquals(1, combo.getItemCount());
JdbcUrl url = (JdbcUrl)combo.getItemAt(0);
assertDriversEqual(driver2, url.getDriver());
assertEquals(driver2.getClassName(), url.getClassName());
assertEquals(driver2.getDisplayName(), url.getDisplayName());
}
/**
* Verify the contents of the JComboBox.
*
* @param box The {@code JComboBox} to verify.
* @return True if all is well.
*/
private boolean verifyWholeBox(JComboBox<Integer> box) {
final int n = box.getItemCount();
for (int i = 0; i < n; i++) {
Integer v = box.getItemAt(i);
if (v < 0 || v > available) return false;
}
return true;
}
static <Option> void setSelected(JComboBox<Option> combo, Object value) {
for (int i = combo.getItemCount() - 1; i >= 0; i--) {
PrefOption opt = (PrefOption) combo.getItemAt(i);
if (opt.getValue().equals(value)) {
combo.setSelectedItem(opt);
return;
}
}
combo.setSelectedItem(combo.getItemAt(0));
}
static void setSelected(JComboBox<?> combo, Object value) {
for (int i = combo.getItemCount() - 1; i >= 0; i--) {
ComboOption opt = (ComboOption) combo.getItemAt(i);
if (opt.getValue().equals(value)) {
combo.setSelectedItem(opt);
return;
}
}
combo.setSelectedItem(combo.getItemAt(0));
}
/**
* Since JComboBox.getSelectedItem() returns a plain Object, this allows us to get the
* appropriate type of object instead.
*/
public static <E> E getTypedSelectedItemFromCombo(JComboBox<E> combo) {
int index = combo.getSelectedIndex();
return index == -1 ? null : combo.getItemAt(index);
}