Chapter 14 Using Layout Managers

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Chapter 14Using Layout Managers
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Adding a New Customer
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Adding a New Customer
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• You need to start by importing the classes it
  uses
• The java.awt class has the Font and Color classes
• The javax.swing class contains the GUI components
• The ActionEvent and ActionListener interfaces are
  in the java.awt.event class
• JTextField instances are used to input the
  customers name, address, and phone number
• JButton instances are used after the customer
  data is entered, to clear the text fields, and to
  end processing

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Creating the Logo Panel
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• The JLabel class is used to contain the marinas
  logo
• The foreground color is set to red using the
  Color.red constant
• The font is set to Times Roman 36 point italic
  using the TimesRoman font name, and the
  Font.ITALIC constant

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Creating the Center Panel

• The customer name, address, and phone text boxes
  are added to the centerPanel
• This panel is added to the Frame instance
• The SwingConstants class is used to set the
  alignment
• LEFT
• RIGHT
• CENTER

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Creating the Lower Panel
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• Three button instances are added to the lower
  panel to support the Add, Clear, and Close
  operations
• You need to call the addActionListener method for
  each button to process the events

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Handling Events

• An anonymous inner class is defined to handle
  events
• The actionPerformed method determines which
  button was clicked, and then invokes the
  appropriate method to handle the event

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Using a Dialog Box
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• If the user clicks the Add button, but hasnt
  entered valid data, an error message should be
  displayed
• The statement to display a simple dialog box with
  a message that requires the user to click the OK
  button to continue isJOptionPane.showMessageDial
  og(this,message)

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Using a Dialog Box
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Using a Dialog Box
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Add Customer GUI (i)
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Add Customer GUI (ii)
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Add Customer GUI (iii)
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Finding a Customer
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Using the JList Class

• The JList class is used to display a list of
  customer names
• When the user selects a name and then clicks on
  the Find button, that customers name and address
  are displayed
• The JList constructor takes a Vector object which
  contains the data that is displayed

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Adding Text Fields

• JTextField objects are created to display the
  address and phone number
• A JTextField object is used to allow the user to
  update these values

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Find Customer GUI (i)
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Find Customer GUI (ii)
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Find Customer GUI (iii)
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Adding a Boat

• Develop a GUI that allows you to add a new boat
  to the marina system
• You can add a PowerBoat or SailBoat

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Adding a Boat
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Adding a Boat
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Adding a Boat
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Adding a Boat
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Using Radio Buttons

• The radio buttons are used to indicate the type
  of boat you are adding
• The RadioButton constructor takes two arguments
• The caption to be displayed
• The buttons initial state true if selected,
  false otherwise
• You can trigger a radio button click event by
  calling doClick

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Add A Sailboat
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Add A PowerBoat
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The clearForm Method
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• To blank out the text fields use the setText
  method pass an empty string as the argument
• manufacturerText.setText()

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AddBoat.java (i)
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AddBoat.java (ii)
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AddBoat.java (iii)
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AddBoat.java (iv)
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AddBoat.java (v)
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AddBoat.java (vi)