java Basic GUI Components

Components share many common methods, for example:
		cmp.requestFocus();	Puts focus (eg, blinking cursor) in field, select button, etc.
		cmp.setFont(f);	Sets font.
JLabel - For fixed text.
	lbl =	new JLabel(t)	Creates JLabel with text t on it.
	lbl =	new JLabel(t, align)	Align text JLabel.LEFT, JLabel.CENTER, or JLabel.RIGHT.
	lbl =	new JLabel(icon)	Displays icon (eg, ImageIcon).
	lbl =	new JLabel(icon, align)	Align icon to JLabel.LEFT, JLabel.CENTER, or JLabel.RIGHT.
JTextField - Box containing one line of text.
	tf =	new JTextField(n);	Creates textfield n characters wide.
	s =	tf.getText();	Returns string in textfield.
		tf.setText(s);	Sets text to s.
		tf.addActionListener(lst);	Action listener lst will be called if enter typed.
		tf.setEditable(bool);	Don't allow user to edit text field used for output.
		tf.setHorizontalAlignment(align);	JTextField.LEFT (default), JTextField.CENTER, or JTextField.RIGHT
JButton - Standard clickable button.
	btn =	new JButton(t);	Creates button with text t.
	btn =	new JButton(img);	Creates button with icon img.
	btn =	new JButton(t, img);	Creates button with both text and icon.
		btn.addActionListener(actlstnr);	Action listener actlstnr called when button clicked.
		btn.setEnabled(bool);	Used to enable/disable button.
JTextArea - Box containing multiple lines of text separated by '\n'.
	ta =	new JTextArea(rows, cols);	Creates textarea with specifed number of rows and columns.
	s =	ta.getText();	Returns string in text area.
		ta.setText(s);	Sets text to s.
		ta.append(s);	Adds s to end of existing text.
		ta.insert(s, pos);	Inserts s at position pos.
		ta.setEditable(bool);	Don't allow user to edit textarea if used for output.
		ta.setLineWrap(bool);	Allow/disallow long lines to wrap.
		ta.setWrapStyleWord(bool);	Call setLineWrap(true) first. true wraps at word boundaries, false (default) at characters.
		ta.setBorder(brdr);	Add space between text and edge. Eg, to add 4 pixels use brdr BorderFactory.createEmptyBorder(4,4,4,4)
JCheckBox - Check box followed by text. Use either listener or check with isSelected().
	cb =	new JCheckBox(text);	Creates check box initially unchecked.
	cb =	new JCheckBox(text, bool);	Creates check box with checked state tf.
	b =	cb.isSelected();	Returns bool if box is checked/unchecked.
		cb.setSelected(bool);	Sets checked state to tf.
		cb.addActionListener(actlstnr);	Adds ActionListener, which is called whenever user clicks.
		cb.setEnabled(bool);	Used to enable/disable check box.