Topic 5 : More Complex User InterfacesDDOOCP

Swing Components (Classes)

› javax.swing

1. JOptionPane

2. JFrame

3. JButton

4. JTextField

5. Jlabel

6. JPasswordField

7. JTextArea

8. JRadioButton

9. JCheckBox

10.JComboBox

11.JPanel

12.JScrollBar

13.JScrollPane

14.JSlider

JOptionPane.showMessageDialog

JOptionPane.showMessageDialog

› Possible values for messageType are -1, 0, 1, 2, 3

Message Type arguments of showMessageDialog

1. JOptionPane.PLAIN_MESSAGE (no icon will be used) => -1

2. JOptionPane.ERROR_MESSAGE => 0

3. JOptionPane.INFORMATION_MESSAGE => 1

4. JOptionPane.WARNING_MESSAGE => 2

5. JOptionPane.QUESTION_MESSAGE => 3

JOptionPane.showMessageDialog

JOptionPane.showInputDialog

JOptionPane.showInputDialog

› WAP to take 2 inputs from user and display the sum.

JOptionPane.showConfirmDialog

JFrame› Constructors

– JFrame( )

– JFrame(String str)

› Methods

– Container getContentPane( )

– void setDefaultCloseOperation(int value)

– void remove(Component cm)

– void setLayout(LayoutManager manager)

› Other inherited Methods– setSize( )

– setVisible( )

– setTitle( )

– setBackground( )

– add( )

JFrame

JButton

› Constructors– JButton( )

– JButton(String str)

› Methods

– void setText(String str)

– void setEnabled(boolean b)

– String getText( )

– void addActionListener(ActionListener al)

JButton

Click event in JButton

JTextField

› Constructors JTextField( )

JTextField(String str)

› Methods void addActionListener(ActionListener al)

void removeActionListener(ActionListener al)

void setFont( )

• Inherited Methods

void setText(String t)

String getText( )

void setBackground(Color bg)

void setForeground(Color fg)

void setEditable(boolean b)

void copy( )

void cut( )

void paste( )

JLabel

› Constructors JLabel( )

JLabel(str)

› Methods String getText( )

void setText(String str)

• Inherited Methods

void setVisible(boolean visible)

void setEnabled(boolean enabled)

void setBounds(int x, int y, int width, int height)

Develop the following application.

JTextArea

› Constructors JTextArea( )

JTextArea(String str)

› Methods void append(String text)

void insert(String text, int position)

void setFont(Font f)

• Inherited Methods

String getText( )

void setText(String text)

void setVisible(boolean visible)

void setEnabled(boolean enabled)

TextAreaDemo

JPasswordField

› Constructors JPasswordField( )

JPasswordField(String str)

› Methods void copy( )

void cut( )

String getText( )

char[ ] getPassword( )

String getText( ) method is Deprecated.

• Inerited Methods

void setVisible(boolean visible)

void setEnabled(boolean enabled)

Login Logic

Login Form

Login Form

Login Form

JPanel

› Constructors JPanel( )

JPanel (LayoutManager layout)

› Inherited Methods

void setVisible(boolean visible)

void setEnabled(boolean enabled)

void setBackground(Color bg)

JCheckBox

› Constructors JCheckBox( )

JCheckBox(String text)

JCheckBox(String text, boolean selected)

› Inherited Methods

void addActionListener(ActionListener l)

void setText(String text)

void setVisible(boolean visible)

boolean isSelected()

void setSelected(boolean b)

JRadioButton

› Constructors JRadioButton( )

JRadioButton(String text)

JRadioButton(String text, boolean selected)

› Inherited Methods

void addActionListener(ActionListener l)

void setText(String text)

void setVisible(boolean visible)

boolean isSelected()

void setSelected(boolean b)

JRadioButtonDemo

JComboBox

› Constructors JComboBox( )

JComboBox(Object [ ] items)

› Methods void addActionListener(ActionListener l)

void addItem(Object item)

void removeAllItems()

void removeItem(Object item)

void removeItemAt(int index)

void setSelectedItem(Object anObject)

void setSelectedIndex(int anIndex)

Object getSelectedItem()

int getSelectedIndex()

JComboBoxDemo

JComboBoxDemo

JComboBoxDemo

JSlider› Constructors

JSlider( )

JSlider(int orientation)

JSlider.HORIZONTAL => 0

JSlider.VERTICAL => 1

JSlider(int min, int max)

JSlider(int min, int max, int value)

JSlider(int orientation, int min, int max, intvalue)

› Methods

void addChangeListener (ChangeListener l)

int getValue( )

void setValue(int n)

void setPaintLabels(boolean b)

void setMajorTickSpacing(int n)

Slider Demo

JSlider Important Code

Color Chooser

MeroSlider.java

ColorChooser.java

ColorChooser.java

JScrollPane

› ConstructorJScrollPane( )

JScrollPane(Component view)

JScrollPane(Component view, int vertical, int horizontal)

› Methodsvoid setLayout(LayoutManager layout)

Demo First

JScrollPane Example

Multiplication Table of 5

Layout Managers

1. GridLayout

2. NullLayout or Absolute Layout

3. FlowLayout

4. GridBagLayout

5. BorderLayout

6. BoxLayout

GridLayout

› Constructors GridLayout()

GridLayout(int rows, int columns)

GridLayout(int rows, int columns, int hgap, int vgap)

› Methods– void setColumns(int cols)

– void setRows(int rows)

– void setHgap(int hgap)

– void setVgap(int vgap)

GridLayout

FlowLayout

› Constructors FlowLayout()

FlowLayout(int align)

FlowLayout.LEFT => 0

FlowLayout.CENTER => 1

FlowLayout.RIGHT => 2

FlowLayout(int align, int hgap, int vgap)

› Methods– void setAlignment(int align)

– void setHgap(int hgap)

– void setVgap(int vgap)

Fonts

› public Font(String name, int style, int size)

S.N. Modifier and Type Field

1 static final int BOLD

2 static final int ITALIC

3 String name

4 Int size

Events

Event Type Listener Method

ActionEvent ActionListener void actionPerformed(ActionEvent e)

ChangeEvent ChangeListener void stateChanged(ChangeEvent e)

MouseEvent MouseListener void mouseClicked(MouseEvent e)

void mouseEntered(MouseEvent e)

void mouseExited(MouseEvent e)

void mousePressed(MouseEvent e)

void mouseReleased(MouseEvent e)

Events

Event Type Listener Method

KeyEvent KeyListener void keyPressed(KeyEvent e)

void keyReleased(KeyEvent e)

void keyTyped(KeyEvent e)

FocusEvent FocusListener void focusGained(FocusEvent e)

void focusLost(FocusEvent e)

References

› http://www.java2s.com/Tutorial/Java/0240__Swing/UsingJOptionPanetoDisplayaMessage.htm

› http://docs.oracle.com/javase/tutorial/uiswing/components/dialog.html

› http://docs.oracle.com/javase/7/docs/api/javax/swing/JFrame.html

› http://docs.oracle.com/javase/tutorial/uiswing/layout/visual.html

› http://docs.oracle.com/javase/7/docs/api/java/awt/Font.html