Hello Everyone
I have an Internal frame in my application which has a JTable populated with values from a database and a JButton which performs some operation when a row is selected from the JTable.When the user does not select a row from the JTable and clicks the JButton, I would like to show a message asking the user to select a row from the table first.I have tried a few things but none seemed to work.Could someone point me in the right direction please.Any help would be greatly appreciated.
/*
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* and open the template in the editor.
*/
/**
*
*/
import java.awt.event.ActionEvent;
import java.io.IOException;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.*;
import javax.swing.table.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.File;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.Statement;
import java.util.Vector;
public class Intake extends JInternalFrame {
static int openFrameCount = 1;
static final int xOffset = 100, yOffset = 30;
File f=new File("");
String path = f.getAbsolutePath()+"/src/reports/";
AnyPlatformAppPDF app = new AnyPlatformAppPDF();
StockIntakeRevEng srv=new StockIntakeRevEng();
JTable table;
Intake intake;
public Intake() {
super("Goods In" ,
true, //resizable
true, //closable
true, //maximizable
true);//iconifiable
setLocation(xOffset*openFrameCount++, yOffset*openFrameCount++);
JPanel panel = new JPanel();
Vector data = new Vector();
Vector col = new Vector();
final Object obj="Goods In";
try {
// Connect to Database
String driver = "com.mysql.jdbc.Driver";
String url = "jdbc:mysql://localhost:3306/test";
String userid = "root";
String password = "killer";
Class.forName(driver);
Connection connection = DriverManager.getConnection(url, userid, password);
// Read data from a table
String sql = "Select * from transfers where name like '%WS4%'";
Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery(sql);
ResultSetMetaData md = rs.getMetaData();
int columns = md.getColumnCount();
// Get column names
for (int i = 1; i <= columns; i++) {
col.addElement(md.getColumnName(i));
}
// Get row data
while (rs.next()) {
Vector row = new Vector(columns);
for (int i = 1; i <= columns; i++) {
row.addElement(rs.getObject(i));
}
data.addElement(row);
}
rs.close();
stmt.close();
connection.close();
} catch (Exception e) {
System.out.println(e);
}
DefaultTableModel model = new DefaultTableModel(data, col);
table = new JTable(model) {
public boolean isCellEditable(int rowIndex, int colIndex) {
return false; //Disallow the editing of any cell
}
};
JPanel p=new JPanel(new GridBagLayout());
final JButton b = new JButton("Receive"); // Create ui
JScrollPane scroll = new JScrollPane(table);
JTableHeader header = table.getTableHeader();
header.setBackground(Color.darkGray);
b.setPreferredSize(new Dimension(80, 30));
GridBagConstraints gbc=new GridBagConstraints();
gbc.weightx = 1.0;
gbc.weighty = 1.0;
gbc.fill = GridBagConstraints.BOTH;
p.add(b);
p.add(scroll,gbc);
getContentPane().add(p);
setVisible(true);
setSize(500, 250);
pack();
// implement table mouse listener
table.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
int[] selRows;
final Object value;
TableModel tm = table.getModel();
selRows = table.getSelectedRows();
value=tm.getValueAt(selRows[0], 1);
if( SwingUtilities.isRightMouseButton(e))
{
JOptionPane.showMessageDialog(null, "Right Click is not allowed");
}
if (e.getClickCount() == 2) {
app.openFile(path+value+".pdf");
}
b.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
if(table.getSelectedRow()<0) // help required to implement this logic!!
{
JOptionPane.showInternalMessageDialog(rootPane, "Please select a row from the table first!");
}
else{
try {
srv.doParse(obj,value.toString());
} catch (IOException ex) {
Logger.getLogger(Intake.class.getName()).log(Level.SEVERE, null, ex);
} catch (SQLException ex) {
Logger.getLogger(Intake.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
});
}
});
}}Thanks
Kalyan
