JDBC database java using vector of vectors - jdbc

Question

Does someone can help my by creating an database query with vectors?
I want to query the Lieferranten Table of the nordwind database and showing it on a JTable.
My problem is how to show data sets in the jTable1?
This is my previous code:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
import java.sql.*;
import java.util.*;
public class Anzeige extends JFrame {
private JTable jTable1 = new JTable(5, 5);
private DefaultTableModel jTable1Model = (DefaultTableModel) jTable1.getModel();
private JScrollPane jTable1ScrollPane = new JScrollPane(jTable1);
public Anzeige (String title) {
super (title);
setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
int frameWidth = 676;
int frameHeight = 467;
setSize(frameWidth, frameHeight);
Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
int x = (d.width - getSize().width) / 2;
int y = (d.height - getSize().height) / 2;
setLocation(x, y);
Container cp = getContentPane();
cp.setLayout(null);
// Anfang Komponenten
jTable1ScrollPane.setBounds(72, 56, 521, 289);
jTable1.getColumnModel().getColumn(0).setHeaderValue("Title 1");
jTable1.getColumnModel().getColumn(1).setHeaderValue("Title 2");
jTable1.getColumnModel().getColumn(2).setHeaderValue("Title 3");
jTable1.getColumnModel().getColumn(3).setHeaderValue("Title 4");
jTable1.getColumnModel().getColumn(4).setHeaderValue("Title 5");
cp.add(jTable1ScrollPane);
// Ende Komponenten
setResizable(false);
setVisible(true);
}
public static void main(String[] args) {
new Anzeige("Anzeige");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection dbConn = DriverManager.getConnection("jdbc:mysql://localhost:3306/nordwind", "root", "");
Statement statement = dbConn.createStatement();
ResultSet results = statement.executeQuery("SELECT * FROM Lieferranten");
Vector vector = new Vector();
while (results.next()) {
String s1 = results.getString(2);
String s2 = results.getString(5);
System.out.println(s1 + "\n" + s2);
System.out.println(results.getString(2) + " " + results.getString(5));
Vector data = new Vector();
data.add(results.getString(1));
data.add(results.getString(2));
vector.add(data);
}
//results.close();
statement.close();
dbConn.close();
}
catch (InstantiationException e) {
System.err.println("Error in Instantiation!");
}
catch (ClassNotFoundException e) {
System.err.println("Class not found!");
}
catch (IllegalAccessException e) {
System.err.println("Access denied!");
}
catch (SQLException e) {
System.err.println("SQL Error!");
}
}
}

Answer 1

I assume that you will get five column values as you had added five column titles. After that use addRow(java.util.Vector) method of DefaultTableModel to insert row in jTable1.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
import java.sql.*;
import java.util.*;
public class Anzeige extends JFrame {
private JTable jTable1 = new JTable(5, 5);
private DefaultTableModel jTable1Model = (DefaultTableModel) jTable1.getModel();
private JScrollPane jTable1ScrollPane = new JScrollPane(jTable1);
public Anzeige (String title) {
super (title);
setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
int frameWidth = 676;
int frameHeight = 467;
setSize(frameWidth, frameHeight);
Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
int x = (d.width - getSize().width) / 2;
int y = (d.height - getSize().height) / 2;
setLocation(x, y);
Container cp = getContentPane();
cp.setLayout(null);
// Anfang Komponenten
jTable1ScrollPane.setBounds(72, 56, 521, 289);
jTable1.getColumnModel().getColumn(0).setHeaderValue("Title 1");
jTable1.getColumnModel().getColumn(1).setHeaderValue("Title 2");
jTable1.getColumnModel().getColumn(2).setHeaderValue("Title 3");
jTable1.getColumnModel().getColumn(3).setHeaderValue("Title 4");
jTable1.getColumnModel().getColumn(4).setHeaderValue("Title 5");
cp.add(jTable1ScrollPane);
// Ende Komponenten
setResizable(false);
setVisible(true);
}
public static void main(String[] args) {
new Anzeige("Anzeige");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection dbConn = DriverManager.getConnection("jdbc:mysql://localhost:3306/nordwind", "root", "");
Statement statement = dbConn.createStatement();
ResultSet results = statement.executeQuery("SELECT * FROM Lieferranten");
while (results.next()) {
String s1 = results.getString(2);
String s2 = results.getString(5);
System.out.println(s1 + "\n" + s2);
System.out.println(results.getString(2) + " " + results.getString(5));
Vector data = new Vector();
data.add(results.getString(1));
data.add(results.getString(2));
data.add(results.getString(3));
data.add(results.getString(4));
data.add(results.getString(5));
jTable1Model.addRow(data);
}
//results.close();
statement.close();
dbConn.close();
}
catch (InstantiationException e) {
System.err.println("Error in Instantiation!");
}
catch (ClassNotFoundException e) {
System.err.println("Class not found!");
}
catch (IllegalAccessException e) {
System.err.println("Access denied!");
}
catch (SQLException e) {
System.err.println("SQL Error!");
}
}
}