Getting from database, putting into jtextfield

[WLX]

I have one entity class, a database package and the GUI.

Now I have problem getting the info from the database to put into the jtextfield. The red selected words are the problem I faced.

Entity:

package forms.ui.images.Entity;

import java.sql.ResultSet;	
import java.util.ArrayList;
import forms.ui.images.database.DBController;

public class Souv {
public int itemLeft;

public Souv() {	
super();

Souv(int itemLeft) {
super();
this.itemLeft = itemLeft;
}

public int getItemLeft() {
return itemLeft;
}
public void setItemLeft(int itemLeft) {
this.itemLeft = itemLeft;
}


public boolean retrieveSouvenirs(){		
ResultSet rs = null;
DBController db = new DBController();
db.setUp("Database");
String dbQuery = "SELECT * FROM Souvenirs WHERE ItemLeft =\'" + itemLeft + "\'"; 

rs = db.readRequest(dbQuery);

try{
if (rs.next()){
itemLeft = rs.getInt("ItemLeft");
success = true;     
}
}
catch (Exception e) {
e.printStackTrace();
}
	
db.terminate();
return success;
}

GUI:

package forms.ui.images;
import javax.swing.JPanel;
import javax.swing.JTextField;
import forms.ui.images.Entity.Souv;

public class Souvenirs extends JPanel {

private JTextField jTextFieldLeft = null;
private Souv Souvenir = null;

public Souvenirs(MainFrame f) {
super();
myFrame = f; 
initialize();
}

private void initialize() {
this.add(jLabelLeft, null);
}

private JTextField getJTextFieldLeft() {
if (jTextFieldLeft == null) {
jTextFieldLeft = new JTextField();
jTextFieldLeft.setBounds(new Rectangle(390, 210, 106, 31));
jTextFieldLeft.setEditable(false);
Souvenir.retrieveSouvenirs();
jTextFieldLeft.setText([COLOR="Red"]Souvenir.getItemLeft().toString()[/COLOR]);
}
return jTextFieldLeft;
}
}

Help me!!!

:confused:

[PhHein]

private Souv Souvenir = null;

You never instanciated Souvenir. And read the coding conventions, variable names start with lower case letters.

[WLX]

Hello!

I have changed to

private Souv Souvenir = new Souv();

What do you mean by variable names start with lower case?

Please guide me! Thanks!

[PhHein]

Read this: Code Conventions for the Java(TM) Programming Language: Contents