GUI classes

javax.swing
Class JFrame

Constructor Summary
`JFrame()` Constructs a new frame that is initially invisible.
`JFrame(String title)` Creates a new, initially invisible `Frame` with the specified title.

Method Summary
`Container`	`getContentPane()` Returns the contentPane (panel) object for this frame. (Use this when you need to operate on the `JFrame` as if it were a `JPanel`.)
`void`	`setDefaultCloseOperation(int operation)` Sets the operation that will happen by default when the user initiates a "close" on this frame.
`void`	`setLayout(LayoutManager manager)` Sets the `LayoutManager`.
`void`	`setTitle(String title)` Sets the title for this frame to the specified string.
`Component`	`add(Component comp)` Appends the specified component to the end of this container.
`void`	`setLocation(int x, int y)` Moves this component to a new location.
`void`	`setSize(int width, int height)` Resizes this component so that it has width `width` and height `height`.
`void`	`setVisible(boolean b)` Shows or hides this component depending on the value of parameter `b`.
`void`	`setBackground(Color bg)` Sets the background color of this component.

java.awt.event
Interface ActionListener

Method Summary
`void`	`actionPerformed(ActionEvent e)` Invoked when an action occurs.

java.awt
Class FlowLayout

Constructor Summary
`FlowLayout()` Constructs a new `FlowLayout` with a centered alignment and a default 5-unit horizontal and vertical gap.

java.awt
Class GridLayout

Constructor Summary
`GridLayout()` Creates a grid layout with a default of one column per component, in a single row.
`GridLayout(int rows, int cols)` Creates a grid layout with the specified number of rows and columns.

javax.swing
Class ImageIcon

Constructor Summary
`ImageIcon(String filename)` Creates an ImageIcon from the specified file.

javax.swing
Class JPanel

Constructor Summary
`JPanel()` Creates a new `JPanel` with a double buffer and a flow layout.

Method Summary
`void`	`setLayout(LayoutManager mgr)` Sets the layout manager for this container.
`Component`	`add(Component comp)` Appends the specified component to the end of this container.
`void`	`setBackground(Color bg)` Sets the background color of this component.

javax.swing
Class JLabel

Constructor Summary
`JLabel()` Creates a `JLabel` instance with no image and with an empty string for the title.
`JLabel(String text)` Creates a `JLabel` instance with the specified text.

Method Summary
`String`	`getText()` Returns the text string that the label displays.
`void`	`setText(String text)` Defines the single line of text this component will display.

javax.swing
Class JButton

Constructor Summary
`JButton()` Creates a button with no set text or icon.
`JButton(Icon icon)` Creates a button with an icon.
`JButton(String text)` Creates a button with text.
`JButton(String text, Icon icon)` Creates a button with initial text and an icon.

Method Summary
`void`	`addActionListener(ActionListener l)` Adds an `ActionListener` to the button.
`void`	`setIcon(Icon defaultIcon)` Sets the button's default icon.
`void`	`setText(String text)` Sets the button's text.

javax.swing
Class JTextField

Constructor Summary
`JTextField()` Constructs a new `TextField`.
`JTextField(int columns)` Constructs a new empty `TextField` with the specified number of columns.
`JTextField(String text)` Constructs a new `TextField` initialized with the specified text.
`JTextField(String text, int columns)` Constructs a new `TextField` initialized with the specified text and columns.

Method Summary
`String`	`getText()` Returns the text contained in this `TextComponent`.