swing blob image

[muntago Richard]

good day experts, this code was aimed at displaying image from database but the codes runs and display an empty page.
please help me fix the problem

import java.sql.*;
import java.awt.*;
import javax.swing.*;


import java.awt.Graphics;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JLabel;


public class Maggi {
	public static void main(String argv[]) {
		try {
			
Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
Connection con = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:food", "root", "root");


			Statement stmt = con.createStatement();
			ResultSet rs = stmt.executeQuery("select image from cat where id='200'");
					
			byte[] bytes = null;
			if (rs.next()) {
				bytes = rs.getBytes(1);
			}
			rs.close();
			stmt.close();
			con.close();
			if (bytes != null) {
				JFrame f = new JFrame();
				f.setTitle("Display Image From database");
				Image image = f.getToolkit().createImage(bytes);
				f.getContentPane().add(new Pane(image));
				f.setSize(900, 900);
				f.setVisible(true);
			}
		} catch (Exception e) {
		}
	}
}

class Pane extends JDesktopPane {
	private Image image;

	public Pane(Image image) {
		this.image = image;
	}

	public void paintComponent(Graphics g) {
		super.paintComponent(g);
		g.drawImage(image, 0, 0, this);
	}
}

thanks

[Rob Spoor]

Are you sure the image is loaded from the database properly? What's the value of bytes?

And why are you using JDesktopPane? Why not simply extend JPanel?

[Tom Reilly]

You should QuoteYourSources: http://www.roseindia.net/tutorial/java/swing/retrieveImage.html.

[muntago Richard]

i have ammended the code as you said but its still displaying an empty page. just as you said ,is like the image is not loaded properly. So what do i do.
below is the code as being ammended thanks

import java.sql.*;
import java.awt.*;
import javax.swing.*;

import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import javax.swing.JFrame;

import java.awt.Graphics;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class Maggi {
	public static void main(String args[]) {
		try {
			
Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
Connection con = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:food", "root", "root");


			Statement stmt = con.createStatement();
			ResultSet rs = stmt.executeQuery("select image from cat where id='200'");
				byte[] bytes=new byte[1024];	
			//byte[] bytes = null;
			if (rs.next()) {
				bytes = rs.getBytes(1);
			}
			rs.close();
			stmt.close();
			con.close();
			if (bytes != null) {
                                  JPanel panel;
                                 panel=new JPanel();
				JFrame f = new JFrame();
				f.setTitle("Display Image From database");
				Image image = f.getToolkit().createImage(bytes);
				f.getContentPane().add(new Pane(image));
				f.setSize(900, 900);
				f.setVisible(true);
			}
		} catch (Exception e) {
		}
	}
}

class Pane extends JPanel {
	private Image image;

	public Pane(Image image) {
		this.image = image;
	}

	public void paintComponent(Graphics g) {
		super.paintComponent(g);
		g.drawImage(image, 0, 0, this);
	}
}

[Rob Spoor]

You should start by not catching Exception and then ignoring it. This may very well be causing the problem. The least you should do with any exception you don't want to handle is print its stack trace.

[muntago Richard]

I have used

catch (Exception e) {
e.printStackTrace();
		}

but it still display empty page