Dobrý den,
při třídění hodnot JXTable (ale přepokládám, že i obyčejná JTable)
používá compare(Object,
Object) z třídy java.text.Collator. Podle javadocu i zdrojáku v
sun-java6-jdk k metodě je vyloženě napsáno, že jen zavolá compare((String)
o1, (String) o2):
public int compare(Object o1, Object o2) {
return compare((String)o1, (String)o2);
}
Kvůli tomuto přetypování ovšem velmi lehce vyhazuje "ClassCastException:
<neco> cannot be cast to String". Neměla by spíše používat toString()? Tím
by k ničemu nedocházelo. toString() funguje jednoduše vždy.
public int compare(Object o1, Object o2) {
return compare(o1.toString(), o2.toString());
}
Protože v mém případě JTable pracuje převážně s třídou Object, pak v
podstatě dělá JDK toto:
public class CastTest {
public static void main(String[] args) {
Object o = new Double("3.14");
System.out.println((String) o);* // ClassCastException!!!*
}
}
*Celý stack trace:*
java.lang.ClassCastException: cz.aerocan.reprodb.artworkmodel.ArtworkType
cannot be cast to java.lang.String
at java.text.Collator.compare(Collator.java:310)
at javax.swing.DefaultRowSorter.compare(DefaultRowSorter.java:951)
at javax.swing.DefaultRowSorter.access$100(DefaultRowSorter.java:95)
at javax.swing.DefaultRowSorter$Row.compareTo(DefaultRowSorter.java:1359)
at
javax.swing.DefaultRowSorter$Row.compareTo(DefaultRowSorter.java:1349)
at java.util.Arrays.mergeSort(Arrays.java:1144)
at java.util.Arrays.sort(Arrays.java:1079)
at
javax.swing.DefaultRowSorter.sortExistingData(DefaultRowSorter.java:536)
at javax.swing.DefaultRowSorter.setSortKeys(DefaultRowSorter.java:304)
at
org.jdesktop.swingx.sort.DefaultSortController.toggleSortOrder(DefaultSortController.java:142)
at
javax.swing.plaf.basic.BasicTableHeaderUI$MouseInputHandler.mouseClicked(BasicTableHeaderUI.java:96)
at
java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:253)
at java.awt.Component.processMouseEvent(Component.java:6291)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6053)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4651)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4481)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4247)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2478)
at java.awt.Component.dispatchEvent(Component.java:4481)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:643)
at java.awt.EventQueue.access$000(EventQueue.java:84)
at java.awt.EventQueue$1.run(EventQueue.java:602)
at java.awt.EventQueue$1.run(EventQueue.java:600)
at java.security.AccessController.doPrivileged(Native Method)
at
java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at
java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
at java.awt.EventQueue$2.run(EventQueue.java:616)
at java.awt.EventQueue$2.run(EventQueue.java:614)
at java.security.AccessController.doPrivileged(Native Method)
at
java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:613)
at
org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:148)
[catch] at
java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Díky
Libor
