short notes on Java GUI Containers

Top-level Container: javax.swing.JFrame
JFrame - window, typically subclassed
w =	new JFrame();	Constructor
w =	new JFrame(t);	Constructor. Sets titlebar to t.
	w.setTitle(t);	Sets titlebar text to t
	w.setDefaultCloseOperation(opt);	JFrame.EXIT_ON_CLOSE terminates program when close box clicked.
	w.setVisible(true/false);	Make visible (and start GUI thread) or hide.
	w.pack();	Calculates layout on all inner containers and sets size of JFrame.
	w.setContentPane(cont);	Sets the content pane - common to pass a JPanel here.
cont =	w.getContentPane();	Returns the window's content pane.
	w.setJMenuBar(mb);	Adds a JMenuBar.
	w.setResizable(false);	Prevent user from resizing window.
	w.setLocation(x, y);	Positions window's top left corner at screen coordinates (x, y).
	w.setSize(w, h);	Sets window size, but use layouts and pack() instead.
	w.show();	Deprecated. Use w.setVisible(true).
	w.hide();	Deprecated. Use w.setVisible(false).
Top-level Containers: Dialogs: JOptionPane, JFileChooser, JColorChooser, JDialog
JOptionPane - Commonly used to create dialogs.
Low-level Container supporting layouts - JPanel
JPanel - Set layout and add components to JPanel.
p =	new JPanel();	Creates new JPanel
	p.setLayout(layout);	Sets the panel's layout.
	p.add(widget);	Add widget to next position - FlowLayout, GridLayout, BoxLayout.
	p.add(widget, constraint);	Add widget at position constraint = BorderLayout, GridbagLayout).
Low-level Containers - special purpose - JSrollPane, JTabbedPane
JScrollPane - Holds textarea, list, (or large images in label) and adds scroll bars as necessary.
scr =	new JScrollPane(textarea);	Surrounds textarea with scrollbars as needed.
JTabbedPane - Display tabs to allow user to select one of many panels.
tp =	new JTabbledPane();	Constructor. Creates new tabbed pane.
tp =	new JTabbledPane(place);	Constructor. placement is JTabbedPane.TOP (default), BOTTOM, LEFT, or RIGHT.
tp =	new JTabbledPane(place, ovrfl);	Constructor. ovrfl tells what to do if too many tabs: JTabbedPane.WRAP_TAB_LAYOUT or .SCROLL_TAB_LAYOUT.
	tp.addTab(title, comp);	Adds tab labelled with string title which displays comp (usually JPanel).
	tp.addTab(title, icon, comp);	Used string and icon for tab label.