En cuanto a la pila de llamadas, realmente no se puede hacer lo que quiera sin jugar con AWT-Events:
Thread [AWT-EventQueue-0] (Suspended (breakpoint at line 384 in DefaultListSelectionModel))
DefaultListSelectionModel.changeSelection(int, int, int, int, boolean) line: 384
DefaultListSelectionModel.changeSelection(int, int, int, int) line: 415
DefaultListSelectionModel.setSelectionInterval(int, int) line: 459
TestJList$1(JList<E>).setSelectionInterval(int, int) line: 2067
BasicListUI$Handler.adjustSelection(MouseEvent) line: 2739
BasicListUI$Handler.mousePressed(MouseEvent) line: 2695
AWTEventMulticaster.mousePressed(MouseEvent) line: 280
TestJList$1(Component).processMouseEvent(MouseEvent) line: 6502
TestJList$1(JComponent).processMouseEvent(MouseEvent) line: 3321
TestJList$1.processMouseEvent(MouseEvent) line: 24
TestJList$1(Component).processEvent(AWTEvent) line: 6270
TestJList$1(Container).processEvent(AWTEvent) line: 2229
TestJList$1(Component).dispatchEventImpl(AWTEvent) line: 4861
TestJList$1(Container).dispatchEventImpl(AWTEvent) line: 2287
TestJList$1(Component).dispatchEvent(AWTEvent) line: 4687
LightweightDispatcher.retargetMouseEvent(Component, int, MouseEvent) line: 4832
LightweightDispatcher.processMouseEvent(MouseEvent) line: 4489
LightweightDispatcher.dispatchEvent(AWTEvent) line: 4422
JFrame(Container).dispatchEventImpl(AWTEvent) line: 2273
JFrame(Window).dispatchEventImpl(AWTEvent) line: 2713
JFrame(Component).dispatchEvent(AWTEvent) line: 4687
EventQueue.dispatchEventImpl(AWTEvent, Object) line: 707
EventQueue.access$000(EventQueue, AWTEvent, Object) line: 101
EventQueue$3.run() line: 666
EventQueue$3.run() line: 664
AccessController.doPrivileged(PrivilegedAction<T>, AccessControlContext) line: not available [native method]
ProtectionDomain$1.doIntersectionPrivilege(PrivilegedAction<T>, AccessControlContext, AccessControlContext) line: 76
ProtectionDomain$1.doIntersectionPrivilege(PrivilegedAction<T>, AccessControlContext) line: 87
EventQueue$4.run() line: 680
EventQueue$4.run() line: 678
Se podría implementar su propio ListUI y luego haz lo que quieras (incluso prevenir este comportamiento no deseado), pero realmente no recomendaría ir por ese camino.
Por lo que vale la pena (que se realiza reemplazando métodos processXXXEvent), aquí es un pequeño fragmento que en realidad parece no tan feo y que impide seleccionar objetos al hacer clic fuera de sus límites:
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;
public class TestJList {
private JList list;
protected void initUI() {
JFrame frame = new JFrame("test");
list = new JList(new Object[] { "Hello", "World", "!" }) {
private boolean processEvent(MouseEvent e) {
int index = list.locationToIndex(e.getPoint());
return index > -1 && list.getCellBounds(index, index).contains(e.getPoint());
}
@Override
protected void processMouseEvent(MouseEvent e) {
if (processEvent(e)) {
super.processMouseEvent(e);
}
}
@Override
protected void processMouseMotionEvent(MouseEvent e) {
if (processEvent(e)) {
super.processMouseMotionEvent(e);
}
}
};
list.setVisibleRowCount(10);
frame.add(new JScrollPane(list));
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new TestJList().initUI();
}
});
}
}
SO ISN' generador de código t, para una mejor ayuda antes publicar un [SSCCE] (http://sscce.org/), de lo contrario mi respuesta es amplia ya que su pregunta es simple de 'consumir' – mKorbel
@GuillaumePolet thnx, omite por completo ese aspecto – Alex
@mKorbel simple ejemplo agregado – Alex