CIS3931 Intro to JAVA

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CIS3931 - Intro to JAVA

• Lecture Notes Set 12
• 12-July-05
• GUI Programming Boxes, ToolBars, TextFields and
  glue

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JToolBar

• GUI Container (you can store other GUI components
  inside of it)
• Similar to a JMenuBar but doesnt have to be at
  the top of the screen (and can contain things
  other than menus)
• Good for creating menus, text lines, etc.

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Creating a JToolBar

• //Create a toolbar (simple)
• JToolBar sampleToolBar new JToolBar( )
• //Create a toolbar (with name)
• JToolBar sampleToolBar new JToolBar(Sample
  Bar)
• //Setting a layout for the toolbar
• sampleToolBar.setLayout(new BoxLayout(sampleToolBa
  r, BoxLayout.Y_AXIS))

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JTextField

• Editable horizontal line
• Can have an action listener associated with it
• Same as the URL line in Internet Explorer
• http//java.sun.com/j2se/1.5.0/docs/api/javax/swin
  g/JTextField.html
• Extention of JTextComponent

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Creating a JTextField - Constructors

• JTextField() Constructs a new TextField.
• JTextField(Document doc, String text, int
  columns) Constructs a new JTextField that uses
  the given text storage model and the given number
  of columns.
• 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.

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Creating a JTextField

• //Create a JTextField
• JTextfield sampleTextField new
  JTextField(sample text)

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Box

• GUI Container
• Similar to a JToolBar, but more customizable
• Best used when you want to group certain
  components together

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Creating a Box

• //Create a Box
• Box sampleBox new Box()
• //Create a Box and set the layout for it
• Box sampleBox new Box(BoxLayout.Y_AXIS)

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JLabel

• GUI text component
• Used to label a JTextField or other component
• //Create a JLabel
• JLabel sampleLabel new JLabel(Text)

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Glue

• Not a true glue (doesnt stick something
  somewhere)
• A filler for GUI components
• Used to create space between components
• By default, most layouts push components up
  against each other
• See todays example code for usage

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Examples

• See advancedgui.java