Bài giảng Lập trình cơ sở dữ liệu Java - Bài 3 tiếp tục cung cấp cho người học các kiến thức về Components. Nội dung chính được trình bày trong chương này gồm có: List JTable, JMenu, JOptionPane, JFileChooser. Mời các bạn cùng tham khảo nội dung chi tiết.
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Nội dung Text: Bài giảng Lập trình Cơ sở dữ liệu – Java: Bài 3.2 - Nguyễn Hữu Thể
- LẬP TRÌNH JAVA CSDL
BÀI 3
COMPONENTS
Nguyễn Hữu Thể
1
- Nội dung
JList
JTable
JMenu
JOptionPane
JFileChooser
2
- JList
Creating a Model
There are three ways to create a list model:
•DefaultListModel — everything is pretty much taken care of for you.
The examples in this page use DefaultListModel.
•AbstractListModel — you manage the data and invoke the "fire"
methods. For this approach, you must subclass AbstractListModel and
implement the getSize and getElementAt methods inherited from the
ListModel interface.
•ListModel — you manage everything.
- JList
Initializing a List
list = new JList(data); //data has type Object[]
list.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SE
LECTION);
list.setLayoutOrientation(JList.HORIZONTAL_WRAP);
list.setVisibleRowCount(-1);
...
JScrollPane listScroller = new JScrollPane(list);
listScroller.setPreferredSize(new Dimension(250, 80));
- JList
DefaultListModel
Methods:
• addElement (Object e)
• get (int index)
• getSize ()
• getElementAt (int index)
• remove (int index)
• Elements()
• removeAllElements ()
5
- JList
Methods:
– setModel (ListModel model), getModel ()
– getMaxSelectionIndex (), getMinSelectionIndex ()
– getSelectedIndex (), getSelectedIndices ()
– getSelectedValue (), getSelectedValues ()
Events:
– valueChanged
6
- JTable
7
- JOptionPane
8
- JTable
DefaultTableModel
– addColumn (Object obj)
– addRow (Object obj)
– getColumnCount ()
– getRowCount ()
– getValueAt (int row, int col)
– setValueAt (Object obj, int row, int col)
9
- JTable
Methods:
– setModel (TableModel tm)
– getModel ()
– getValueAt (int row, int col)
– getRowCount ()
– getColumnCount ()
Events:
– mouseClicked
10
- JTable
package project;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
public class JTableComponent {
public static void main(String[] argv) throws Exception {
Object[][] cellData = {{ "1-1", "1-2" }, { "2-1", "2-2" }};
String[] columnNames = { "col1", "col2" };
JTable table = new JTable(cellData, columnNames);
JFrame f = new JFrame();
f.setSize(300,300);
f.add(new JScrollPane(table));
f.setVisible(true);
} 11
- JTable
DefaultTableModel()
Constructs a default DefaultTableModel which is a table of zero columns and zero rows.
DefaultTableModel(int rowCount, int columnCount)
Constructs a DefaultTableModel with rowCount and columnCount of null object values.
DefaultTableModel(Object[][] data, Object[] columnNames)
Constructs a DefaultTableModel and initializes the table by passing data and columnNames to
the setDataVector method.
DefaultTableModel(Object[] columnNames, int rowCount)
Constructs a DefaultTableModel with as many columns as there are elements in columnNames
and rowCount of null object values.
DefaultTableModel(Vector columnNames, int rowCount)
Constructs a DefaultTableModel with as many columns as there are elements in columnNames
and rowCount of null object values.
DefaultTableModel(Vector data, Vector columnNames)
Constructs a DefaultTableModel and initializes the table by passing data and columnNames to
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the setDataVector method.
- JTable
void addColumn(Object columnName)
Adds a column to the model.
void addColumn(Object columnName, Object[] columnData)
Adds a column to the model.
void addColumn(Object columnName, Vector columnData)
Adds a column to the model.
void addRow(Object[] rowData)
Adds a row to the end of the model.
void addRow(Vector rowData)
Adds a row to the end of the model.
protected
static convertToVector(Object[] anArray)
Vector Returns a vector that contains the same objects as the array.
13
- JTable
void addColumn(Object columnName)
Adds a column to the model.
void addColumn(Object columnName, Object[] columnData)
Adds a column to the model.
void addColumn(Object columnName, Vector columnData)
Adds a column to the model.
void addRow(Object[] rowData)
Adds a row to the end of the model.
void addRow(Vector rowData)
Adds a row to the end of the model.
protected
static convertToVector(Object[] anArray)
Vector Returns a vector that contains the same objects as the array.
14
- JOptionPane
15
- JOptionPane
16
- JOptionPane
17
- JFileChooser
18
- JFileChooser
19
- JFileChooser
20
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