Scrollable JDK 1.6)

public Dimension getPreferredScrollableViewportSize ()

Returns the preferred size of the viewport for a view component.

Returns the preferred size of the viewport for a view component.
For example, the preferred size of a JList component
is the size required to accommodate all of the cells in its list.
However, the value of preferredScrollableViewportSize
is the size required for JList.getVisibleRowCount rows.
A component without any properties that would affect the viewport
size should just return getPreferredSize here.
Returns: the preferredSize of a JViewport whose view is this Scrollable
See Also: JComponent.getPreferredSize(),

public int getScrollableBlockIncrement (Rectangle visibleRect, int orientation, int direction)

Components that display logical rows or columns should compute the scroll increment that will completely expose one block of rows or columns, depending on the value of orientation.

public boolean getScrollableTracksViewportHeight ()

Return true if a viewport should always force the height of this Scrollable to match the height of the viewport.

public boolean getScrollableTracksViewportWidth ()

Return true if a viewport should always force the width of this Scrollable to match the width of the viewport.

Return true if a viewport should always force the width of this Scrollable to match the width of the viewport. For example a normal text view that supported line wrapping would return true here, since it would be undesirable for wrapped lines to disappear beyond the right edge of the viewport. Note that returning true for a Scrollable whose ancestor is a JScrollPane effectively disables horizontal scrolling.

Scrolling containers, like JViewport, will use this method each time they are validated.
Returns: True if a viewport should force the Scrollables width to match its own.

public int getScrollableUnitIncrement (Rectangle visibleRect, int orientation, int direction)

Components that display logical rows or columns should compute the scroll increment that will completely expose one new row or column, depending on the value of orientation.