в 17:43, 31 мая 2010

2010-05-31T17:43:48Z

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2010-05-31T14:17:11Z

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== AbstractTableModel: fireTableRowsUpdated(int firstRow, int lastRow) ==



<source lang="java">
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
public class MainClass extends JFrame {
public MainClass() {
super("Dynamic Data Test");
setSize(300, 200);
setDefaultCloseOperation(EXIT_ON_CLOSE);
JTable jt = new JTable(new MarketDataModel(5));
JScrollPane jsp = new JScrollPane(jt);
getContentPane().add(jsp, BorderLayout.CENTER);
}
public static void main(String args[]) {
MainClass mt = new MainClass();
mt.setVisible(true);
}
}
class MarketDataModel extends AbstractTableModel implements Runnable {
Thread runner;
public MarketDataModel(int initialDelay) {
Thread runner = new Thread(this);
runner.start();
}
double[] data = new double[]{1,2,3,4,5};

String[] headers = { "Symbol", "Price", "Change", "Last updated" };
public int getRowCount() {
return 1;
}
public int getColumnCount() {
return headers.length;
}
public String getColumnName(int c) {
return headers[c];
}
public Object getValueAt(int r, int c) {
return data[c];
}

public void updateStocks() {
for (int i = 0; i < data.length; i++) {
data[i] = Math.random();
}
}
public void run() {
while (true) {
updateStocks();
fireTableRowsUpdated(0, data.length - 1);
try {
Thread.sleep(1000);
} catch (InterruptedException ie) {
}
}
}
}

</source>



== extends AbstractTableModel ==



<source lang="java">
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableModel;
public class MainClass {
public static void main(final String args[]) {
final Object rows[][] = { { "one", "1" }, { "two", "2" },
{ "three", "3" } };
final String headers[] = { "English", "Digit" };

TableModel fixedColumnModel = new AbstractTableModel() {
public int getColumnCount() {
return 2;
}
public String getColumnName(int column) {
return headers[column];
}
public int getRowCount() {
return 3;
}
public Object getValueAt(int row, int column) {
return rows[row][column];
}
};

JFrame frame = new JFrame("Scrollless Table");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JTable table = new JTable(fixedColumnModel);

table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);

frame.add(new JScrollPane(table), BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
}
}

</source>



== extends AbstractTableModel (Custom class type) ==



<source lang="java">
import java.awt.BorderLayout;
import java.io.File;
import java.util.Date;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
public class MainClass extends JFrame {
public MainClass() {
super("Custom TableModel Test");
setSize(300, 200);
setDefaultCloseOperation(EXIT_ON_CLOSE);
FileModel fm = new FileModel();
JTable jt = new JTable(fm);
jt.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
jt.setColumnSelectionAllowed(true);
JScrollPane jsp = new JScrollPane(jt);
getContentPane().add(jsp, BorderLayout.CENTER);
}
public static void main(String args[]) {
MainClass ft = new MainClass();
ft.setVisible(true);
}
}
class FileModel extends AbstractTableModel {
String titles[] = new String[] { "Directory?", "File Name", "Read?", "Write?", "Size",
"Last Modified" };
Class types[] = new Class[] { Boolean.class, String.class, Boolean.class, Boolean.class,
Number.class, Date.class };
Object data[][];
public FileModel() {
this(".");
}
public FileModel(String dir) {
File pwd = new File(dir);
setFileStats(pwd);
}
public int getRowCount() {
return data.length;
}
public int getColumnCount() {
return titles.length;
}
public String getColumnName(int c) {
return titles[c];
}
public Class getColumnClass(int c) {
return types[c];
}
public Object getValueAt(int r, int c) {
return data[r][c];
}
public void setFileStats(File dir) {
String files[] = dir.list();
data = new Object[files.length][titles.length];
for (int i = 0; i < files.length; i++) {
File tmp = new File(files[i]);
data[i][0] = new Boolean(tmp.isDirectory());
data[i][1] = tmp.getName();
data[i][2] = new Boolean(tmp.canRead());
data[i][3] = new Boolean(tmp.canWrite());
data[i][4] = new Long(tmp.length());
data[i][5] = new Date(tmp.lastModified());
}
fireTableDataChanged();
}
}

</source>



== extends AbstractTableModel (read database table to a JTable) ==



<source lang="java">
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.Statement;
import java.util.Vector;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.table.AbstractTableModel;
public class MainClass extends JFrame {
JTextField hostField;
JTextField queryField;
QueryTableModel qtm = new QueryTableModel();
public MainClass() {
setDefaultCloseOperation(EXIT_ON_CLOSE);
setSize(350, 200);
JTable table = new JTable(qtm);
JScrollPane scrollpane = new JScrollPane(table);
JPanel commandPanel = new JPanel();
commandPanel.setLayout(new GridLayout(3, 2));
commandPanel.add(new JLabel("Enter the Host URL: "));
commandPanel.add(hostField = new JTextField());
commandPanel.add(new JLabel("Enter your query: "));
commandPanel.add(queryField = new JTextField());
commandPanel.add(new JLabel("Click here to send: "));
JButton jb = new JButton("Search");
jb.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
qtm.setHostURL(hostField.getText().trim());
qtm.setQuery(queryField.getText().trim());
}
});
commandPanel.add(jb);
getContentPane().add(commandPanel, BorderLayout.NORTH);
getContentPane().add(scrollpane, BorderLayout.CENTER);
}
public static void main(String args[]) {
MainClass tt = new MainClass();
tt.setVisible(true);
}
}
class QueryTableModel extends AbstractTableModel {
Vector cache;
int colCount;
String[] headers;
Connection db;
Statement statement;
String currentURL;
public QueryTableModel() {
cache = new Vector();
}
public String getColumnName(int i) {
return headers[i];
}
public int getColumnCount() {
return colCount;
}
public int getRowCount() {
return cache.size();
}
public Object getValueAt(int row, int col) {
return ((String[]) cache.elementAt(row))[col];
}
public void setHostURL(String url) {
if (url.equals(currentURL)) {
return;
}
closeDB();
initDB(url);
currentURL = url;
}
public void setQuery(String q) {
cache = new Vector();
try {
ResultSet rs = statement.executeQuery(q);
ResultSetMetaData meta = rs.getMetaData();
colCount = meta.getColumnCount();
headers = new String[colCount];
for (int h = 1; h <= colCount; h++) {
headers[h - 1] = meta.getColumnName(h);
}
while (rs.next()) {
String[] record = new String[colCount];
for (int i = 0; i < colCount; i++) {
record[i] = rs.getString(i + 1);
}
cache.addElement(record);
}
fireTableChanged(null);
} catch (Exception e) {
cache = new Vector();
e.printStackTrace();
}
}
public void initDB(String url) {
try {
Class.forName("your driver class");
db = DriverManager.getConnection(url);
statement = db.createStatement();
} catch (Exception e) {
System.out.println("Could not initialize the database.");
e.printStackTrace();
}
}
public void closeDB() {
try {
if (statement != null) {
statement.close();
}
if (db != null) {
db.close();
}
} catch (Exception e) {
System.out.println("Could not close the current connection.");
e.printStackTrace();
}
}
}

</source>

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в 17:43, 31 мая 2010

Admin: 1 версия