Bài giảng Lập trình Java CSDL - Bài 3: Components - Nguyễn Hữu Thể

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LẬP TRÌNH JAVA CSDL

BÀI 3

COMPONENTS

Nguyễn Hữu Thể

Nội dung

 JList

 JTable

 JMenu

 JOptionPane

 JFileChooser

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 ()

JList

 Methods:

– setModel (ListModel model), getModel ()

– getMaxSelectionIndex (), getMinSelectionIndex ()

– getSelectedIndex (), getSelectedIndices ()

– getSelectedValue (), getSelectedValues ()

 Events:

– valueChanged

JTable

JOptionPane

JTable

 DefaultTableModel

– addColumn (Object obj)

– addRow (Object obj)

– getColumnCount ()

– getRowCount ()

– getValueAt (int row, int col)

– setValueAt (Object obj, int row, int col)

JTable

 Methods:

– setModel (TableModel tm)

– getModel ()

– getValueAt (int row, int col)

– getRowCount ()

– getColumnCount ()

 Events:

– mouseClicked

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);

}

JTable

Default T a bleModel()

Constructs a default DefaultTableModel which is a table of zero columns and zero rows.

Default T a bleModel(int rowCount, int columnCount)

Constructs a DefaultTableModel with rowCount and columnCount of null object values.

Default T a bleModel(Object[][] data, Object[] columnNames)

Constructs a DefaultTableModel and initializes the table by passing data and columnNames to

the setDataVector method.

Default T a bleModel(Object[] columnNames, int rowCount)

Constructs a DefaultTableModel with as many columns as there are elements in columnNames

and rowCount of null object values.

Default T a bleModel(V e ctor columnNames, int rowCount)

Constructs a DefaultTableModel with as many columns as there are elements in columnNames

and rowCount of null object values.

Default T a bleModel(V e ctor data, V e ctor columnNames)

Constructs a DefaultTableModel and initializes the table by passing data and columnNames to

the setDataVector method.

JTable

voidaddColumn(Object columnName)

Adds a column to the model.

void

addColumn(Object columnName, Object[] columnData)

Adds a column to the model.

addColumn(Object columnName, V e ctor columnData)

Adds a column to the model.

voidaddRow(Object[] rowData)

Adds a row to the end of the model.

voidaddRow(V e ctor rowData)

Adds a row to the end of the model.

protected

static

V e ctor

convert T o V e ctor(Object[] anArray)

Returns a vector that contains the same objects as the array.

JTable

voidaddColumn(Object columnName)

Adds a column to the model.

void

addColumn(Object columnName, Object[] columnData)

Adds a column to the model.

addColumn(Object columnName, V e ctor columnData)

Adds a column to the model.

voidaddRow(Object[] rowData)

Adds a row to the end of the model.

voidaddRow(V e ctor rowData)

Adds a row to the end of the model.

protected

static

V e ctor

convert T o V e ctor(Object[] anArray)

Returns a vector that contains the same objects as the array.

JOptionPane

JFileChooser

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