new ImageFrame(inImg, "Input Image ");// inImg is reference to Image object
The code below can be used to load images in JFrame as a separate window.It also checks for null and displays message "Invalid or No Image".
The Full Working Source Code :
Testing :
public static void main(String[] args) throws Exception {
BufferedImage buf=null;
try {
buf = ImageIO.read(new File("estbest.jpg"));
} catch (Exception e) {
System.out.println(e.getMessage());
}
new ImageFrame(buf, "Input Image ");
}
ImageFrame Class :
//shows image in separate instance of JFrame -
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
public class ImageFrame extends JFrame {
BufferedImage image;
public ImageFrame(final BufferedImage image) {
this(image, "No Title");
}
public ImageFrame(final BufferedImage image, final String title) {
this.image = image;
SwingUtilities.invokeLater(new Runnable() {
public void run() {
if (image != null) {
setSize(image.getWidth(null), image.getHeight(null));
} else {
setSize(250, 90);
}
setTitle(title);
setVisible(true);
repaint();
}
});
}
public void paint(Graphics g) {
if (image == null) {
g.setColor(Color.BLACK);
g.fillRect(0, 0, 250, 90);
System.out.println("image null");
g.setFont(new Font("Arial", Font.BOLD, 24));
g.setColor(Color.RED);
g.drawString("Invalid or No Image", 10, 50);
} else {
g.drawImage(image, 0, 0, null);
}
}
}
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