and

*** NSTimer ignoring exception 'NSInvalidArgumentException' (reason '*** initialization method -initWithCapacity: cannot be sent to an abstract object of class WWDataSource10: Create a concrete instance!') that raised during posting of timer with target 1c01c0 and selector 'setup2:'

These two exceptions were raised because I tried to subclass NSMutableArray directly. NSArray, NSMutableArray, and bunch of other Foundation classes are part of a class cluster. There's some more info at this link. What it basically says is that subclassing one of these classes is probably not what you want to do--you probably want to just create another class as a container and embed the NSArray or whatever in it. But don't take it from me...read the document yourself.

Very simple: read as hex characters, 616C6C20 spells 'all ', and it means "get every instance".

By default, a table uses a javax.swing.table.JTableHeader.UIResourceTableCellRenderer (which extends DefaultTableCellRenderer). That class gets its border by calling javax.swing.UIManager.getBorder("TableHeader.cellBorder"). In my JRE, that border is an apple.laf.AquaListHeaderBorder, which has a method setHorizontalShift(int). JFileChooser has a bug where it calls setHorizontalShift on that border, which will be reused by future JTables, affecting the spacing of their header labels. I work around the problem by calling the following method after showing (and hiding) a JFileChooser:

    private static void workAroundJFileChooserBug() {
        try {
            Object o = javax.swing.UIManager.getBorder( "TableHeader.cellBorder" );
            Method m = o.getClass().getMethod( "setHorizontalShift",
                                               new Class[] { int.class } );
            m.invoke( o, new Object[] { new Integer(0) } );
        } catch ( Exception e ) { }
    }

I don't think it appears anywhere in the OGNL documentation, but you would use a dollar sign to refer to a static inner class. For example, "@com.asdf.Asdf$MyInner@VAL" would give a value of 5:

    package com.asdf;
    public class Asdf {
        public static class MyInner {
            public static final int VAL = 5;
        }
    }