12.18.2 BorderLayout
The BorderLayout layout manager (the default layout manager for a JFrame) arranges components into five regions: NORTH, SOUTH, EAST, WEST and CENTER. NORTH corresponds to the top of the container. Class BorderLayout extends Object and implements interface LayoutManager2 (a subinterface of LayoutManager that adds several methods for enhanced layout processing).
A BorderLayout limits a Container to containing at most five components—one in each region. The component placed in each region can be a container to which other components are attached. The components placed in the NORTH and SOUTH regions extend horizontally to the sides of the container and are as tall as the components placed in those regions. The EAST and WEST ...
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