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LẬP TRÌNH JAVA CSDL
BÀI 3
COMPONENTS
Nguyễn Hữu Thể
1
Nội dung
JLabel
JButton
JTextField
JCheckBox
JRadioButton
JPanel
JComboBox, JList
JTable
JMenu
JToolBar
JOptionPane
JFileChooser
2
GUI Components
JButton, JLabel, JTextField, JCheckBox, JRadioButton, and
JComboBox.
Each GUI component class provides several constructors that
you can use to create GUI component objects.
3
GUI Components
// Create a button with text OK
JButton btOK = new JButton("OK");
// Create a label with text "Enter your name: "
JLabel lbName = new JLabel("Enter your name: ");
// Create a text field with text "Type Name Here"
JTextField txtName = new JTextField("Type Name Here");
// Create a check box with text bold
JCheckBox chkBold = new JCheckBox("Bold");
// Create a radio button with text red
JRadioButton rbRed = new JRadioButton("Red");
// Create a combo box with choices red, green, blue
JComboBox cboColor = new JComboBox(new String[]{"Red",
4
"Green", "Blue"});
Working with Components
javax.swing.Jcomponent
Several methods:
setEnabled(boolean): receive user input (an argument of
true) or is inactive and cannot receive input (false).
Components are enabled by default.
isEnabled() returns a boolean value.
setVisible(boolean): for all components. Use true to display
a component and false to hide it.
isVisible()
setSize(int, int): width and height specified as arguments
setSize(Dimension) uses a Dimension
getSize(): returns a Dimension object with height and width
5
nguon tai.lieu . vn
BÀI 3
COMPONENTS
Nguyễn Hữu Thể
1
Nội dung
JLabel
JButton
JTextField
JCheckBox
JRadioButton
JPanel
JComboBox, JList
JTable
JMenu
JToolBar
JOptionPane
JFileChooser
2
GUI Components
JButton, JLabel, JTextField, JCheckBox, JRadioButton, and
JComboBox.
Each GUI component class provides several constructors that
you can use to create GUI component objects.
3
GUI Components
// Create a button with text OK
JButton btOK = new JButton("OK");
// Create a label with text "Enter your name: "
JLabel lbName = new JLabel("Enter your name: ");
// Create a text field with text "Type Name Here"
JTextField txtName = new JTextField("Type Name Here");
// Create a check box with text bold
JCheckBox chkBold = new JCheckBox("Bold");
// Create a radio button with text red
JRadioButton rbRed = new JRadioButton("Red");
// Create a combo box with choices red, green, blue
JComboBox cboColor = new JComboBox(new String[]{"Red",
4
"Green", "Blue"});
Working with Components
javax.swing.Jcomponent
Several methods:
setEnabled(boolean): receive user input (an argument of
true) or is inactive and cannot receive input (false).
Components are enabled by default.
isEnabled() returns a boolean value.
setVisible(boolean): for all components. Use true to display
a component and false to hide it.
isVisible()
setSize(int, int): width and height specified as arguments
setSize(Dimension) uses a Dimension
getSize(): returns a Dimension object with height and width
5