Low-level Container supporting layouts in java - 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).