Displaying Image in Java

Question

I want to display an image but don't know what to do. Whether I have to install some library files or simply it can be done I don't know. Actually I want to do image processing, but first I have to take the image input and display image then I can get the effect of image processing as the output and decide whether it(algorithm) is correct or not. I have installed the eclipse only. I have searched in Google also but whatever they suggest is not working well. Either I have to install something or not.

I have tried the following code:

public class ImageTest {
    public static void main(String[] args){
        EventQueue.invokeLater(new Runnable() {
            public void run(){
                ImageFrame frame = new ImageFrame();
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setVisible(true);
            }
        }
        );
    }
}

class ImageFrame extends JFrame{
    public ImageFrame(){
        setTitle("ImageTest");
        setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

        ImageComponent component = new ImageComponent();
        add(component);
        getContentPane().validate();
        getContentPane().repaint();
    }

    public static final int DEFAULT_WIDTH = 300;
    public static final int DEFAULT_HEIGHT = 200;
}

class ImageComponent extends JComponent{
    private static final long serialVersionUID = 1L;
    private Image image;
    public ImageComponent(){
        try{
            File image2 = new File("bishnu.jpg");
            image = ImageIO.read(image2);
        } catch (IOException e){
            e.printStackTrace();
        }
    }
    public void paintComponent (Graphics g){
        if(image == null) return;
        int imageWidth = image.getWidth(this);
        int imageHeight = image.getHeight(this);

        g.drawImage(image, 50, 50, this);

        for (int i = 0; i*imageWidth <= getWidth(); i++)
            for(int j = 0; j*imageHeight <= getHeight();j++)
                if(i+j>0) g.copyArea(0, 0, imageWidth, imageHeight, i*imageWidth, j*imageHeight);
    }
}

It simply shows a graphical window but can't show the image "bishnu.jpg"

Should I install anything in eclipse? But I think nothing needs to install.

Answer 1

import java.awt.FlowLayout;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

public class DisplayImage {

    public static void main(String avg[]) throws IOException
    {
        DisplayImage abc=new DisplayImage();
    }

    public DisplayImage() throws IOException
    {
        BufferedImage img=ImageIO.read(new File("f://images.jpg"));
        ImageIcon icon=new ImageIcon(img);
        JFrame frame=new JFrame();
        frame.setLayout(new FlowLayout());
        frame.setSize(200,300);
        JLabel lbl=new JLabel();
        lbl.setIcon(icon);
        frame.add(lbl);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

Answer 2

Running your code shows an image for me, after adjusting the path. Can you verify that your image path is correct, try absolute path for instance?