java Common Components

A, Jpanel

　　1, the panel: a container class components

　　2, use: for use with Layout, JFrame-> JPanel-> Layout

Two, JTextField

　　1, text boxes

　　2, JPasswordField: password box

　　3, constructors

　　（1）JTextField()

　　（2）JTextField(int columns)

　　（3）JTextField(String text)

　　4, commonly used method

　　(1) SetText (string): the value of the text field Text
　　(2) GetText (): Returns the text value of the text input field

　　(3) setEditable (Boolean): whether the text field is read-only

Three, JLabel

　　1, label

Four, JButton

　　1, button