Hai Stefan,

I create one button.when i click the button i need to delete "Image" category 
,without selecting the category folder.i didnt find method for predefine  the 
category name. In every methode selected category is deleting. I add new 
category name into 
StanderdCategoryNames.java   also.Can you please tell me how to predefine  
category name for delete when clicking one button

String[] array = {"Images"};
       List list = Arrays.asList(array);
       Collection selectedCategories = list;
        
 Instead of this code                        //   
execute(toCategorySpecToLayerablesMap(toOrderedCategories(
                                                           //   
context.getLayerNamePanel().getSelectedCategories())),
                                                              //  
pickUnselectedCategory(context.getLayerNamePanel(),
                                                                    //   
context.getLayerManager()), context);



 execute(toCategorySpecToLayerablesMap(toOrderedCategories(
              selectedCategories)),
       pickUnselectedCategory(context.getLayerNamePanel(),
           context.getLayerManager()), context);



but i am getting error:

java.lang.ClassCastException: java.lang.String cannot be cast to 
com.vividsolutions.jump.workbench.model.Category
        at 
com.vividsolutions.jump.workbench.ui.plugin.RemoveCategoryPlugIn.toCategorySpecToLayerablesMap(RemoveCategoryPlugIn.java:135)
        at 
com.vividsolutions.jump.workbench.ui.plugin.RemoveCategoryPlugIn.execute(RemoveCategoryPlugIn.java:103)
        at 
com.vividsolutions.jump.workbench.ui.zoom.RemoveButtonPlugIn.execute(RemoveButtonPlugIn.java:110)
        at 
com.vividsolutions.jump.workbench.plugin.AbstractPlugIn$1.actionPerformed(AbstractPlugIn.java:284)
        at 
javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
        at 
javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
        at 
javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
        at 
javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
        at 
javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
        at 
java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
        at java.awt.Component.processMouseEvent(Component.java:6504)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
        at java.awt.Component.processEvent(Component.java:6269)
        at java.awt.Container.processEvent(Container.java:2229)
        at java.awt.Component.dispatchEventImpl(Component.java:4860)
        at java.awt.Container.dispatchEventImpl(Container.java:2287)
        at java.awt.Component.dispatchEvent(Component.java:4686)
        at 
java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
        at java.awt.Container.dispatchEventImpl(Container.java:2273)
        at java.awt.Window.dispatchEventImpl(Window.java:2713)
        at java.awt.Component.dispatchEvent(Component.java:4686)
        at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:707)
        at java.awt.EventQueue.access$000(EventQueue.java:101)
        at java.awt.EventQueue$3.run(EventQueue.java:666)
        at java.awt.EventQueue$3.run(EventQueue.java:664)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
        at 
java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
        at java.awt.EventQueue$4.run(EventQueue.java:680)
        at java.awt.EventQueue$4.run(EventQueue.java:678)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:677)
        at 
java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
        at 
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
        at 
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)





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