您面临的大部分问题与微调器如何在焦点事件（和其他几个状态事件）之后验证微调器中的任何值有关，这将绕过高亮。
MacOS 更糟糕。
我最终做的是开始Thread等待很短的时间（大约 25 毫秒），然后用来SwingUtilities.invokeLater实际执行选择......
更新了一个例子
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.GridBagLayout;
import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JSpinner;
import javax.swing.SpinnerNumberModel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.text.JTextComponent;
public class AutoFocusSpinner {
public static void main(String[] args) {
new AutoFocusSpinner();
}
public static final SelectOnFocusGainedHandler SHARED_INSTANCE = new SelectOnFocusGainedHandler();
public AutoFocusSpinner() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException ex) {
} catch (InstantiationException ex) {
} catch (IllegalAccessException ex) {
} catch (UnsupportedLookAndFeelException ex) {
}
JSpinner spinner = new JSpinner(new SpinnerNumberModel(1, 0, 100, 1));
installFocusListener(spinner);
JFrame frame = new JFrame("Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new GridBagLayout());
frame.add(spinner);
frame.add(new JButton("Here for testing"));
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public void installFocusListener(JSpinner spinner) {
JComponent spinnerEditor = spinner.getEditor();
if (spinnerEditor != null) {
// This is me spending a few days trying to make this work and
// eventually throwing a hissy fit and just grabbing all the
// JTextComponent components contained within the editor....
List<JTextComponent> lstChildren = findAllChildren(spinner, JTextComponent.class);
if (lstChildren != null && lstChildren.size() > 0) {
JTextComponent editor = lstChildren.get(0);
editor.addFocusListener(SHARED_INSTANCE);
}
}
}
public static <T extends Component> List<T> findAllChildren(JComponent component, Class<T> clazz) {
List<T> lstChildren = new ArrayList<T>(5);
for (Component comp : component.getComponents()) {
if (clazz.isInstance(comp)) {
lstChildren.add((T) comp);
} else if (comp instanceof JComponent) {
lstChildren.addAll(findAllChildren((JComponent) comp, clazz));
}
}
return Collections.unmodifiableList(lstChildren);
}
public static class SelectOnFocusGainedHandler extends FocusAdapter {
@Override
public void focusGained(FocusEvent e) {
Component comp = e.getComponent();
if (comp instanceof JTextComponent) {
final JTextComponent textComponent = (JTextComponent) comp;
new Thread(new Runnable() {
@Override
public void run() {
try {
Thread.sleep(25);
} catch (InterruptedException ex) {
}
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
textComponent.selectAll();
}
});
}
}).start();
}
}
}
}
现在，现在，我正在祈祷我们可以设置一些非常好的、简单的、未记录的属性，这意味着我们不需要做所有这些：P