How do I set an image as the content of a cell in iText?

By Wayan in iText PDF 0 Comment

This example demonstrate how to add an image into a cell in iText. One way to set image into cell’s content is by creating an instance of com.itextpdf.text.pdf.PdfPCell and pass an image object (com.itextpdf.text.Image) in the constructor parameter. The constructor also accept a boolean value whether the image will be fitted into the cell or not.

package org.kodejava.itextpdf;

import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Image;
import com.itextpdf.text.Phrase;
import com.itextpdf.text.pdf.PdfPCell;
import com.itextpdf.text.pdf.PdfPTable;
import com.itextpdf.text.pdf.PdfWriter;

import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.util.Objects;

public class TableImageDemo {
    public static void main(String[] args) {
        Document doc = new Document();
        try {
            PdfWriter.getInstance(doc, new FileOutputStream("TableImage.pdf"));
            doc.open();

            // Creates a table
            PdfPTable table = new PdfPTable(3);
            PdfPCell cell1 = new PdfPCell(new Phrase("Cell 1"));

            // Creates an image and set it as cell's content
            URL resource = TableImageDemo.class.getResource("/java.png");
            Image image = Image.getInstance(Objects.requireNonNull(resource));
            PdfPCell cell2 = new PdfPCell(image, false);
            cell2.setPadding(10);

            PdfPCell cell3 = new PdfPCell(new Phrase("Cell 3"));

            // Add cells to table
            table.addCell(cell1);
            table.addCell(cell2);
            table.addCell(cell3);

            doc.add(table);
        } catch (DocumentException | IOException e) {
            e.printStackTrace();
        } finally {
            doc.close();
        }
    }
}

Maven Dependencies

<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itextpdf</artifactId>
    <version>5.5.13.3</version>
</dependency>

Maven Central

How do I get and display an image in Applet?

By Wayan in Applet, Core API 0 Comment

To display an image in an applet we first need to obtain the image object itself. A call to applet’s getImage(URL url, String name) method help us to create an image object from the specified URL of the image.

For displaying the image on the applet’s screen we draw it in the paint() method using Graphics.drawImage() method.

package org.kodejava.applet;

import java.applet.Applet;
import java.awt.*;

public class AppletGetImage extends Applet {
    private Image logo;

    @Override
    public void init() {
        // Get an Image object that can be painted on the Applet
        // screen. We need to supply the URL of the document as
        // the base location of the image and the location of the
        // image relative the base URL. 
        logo = getImage(getDocumentBase(), "/images/logo.png");
    }

    @Override
    public void paint(Graphics g) {
        g.drawRect(0, 0, getWidth() - 1, getHeight() - 1);
        g.drawImage(logo, 10, 10, this);
    }
}

How do I change JFrame image icon?

By Wayan in Swing 0 Comment

This code snippet demonstrates how to change a JFrame image icon using the setIconImage() method.

package org.kodejava.swing;

import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.WindowConstants;
import java.awt.Dimension;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.URL;

public class FrameIconExample extends JFrame {
    public static void main(String[] args) {
        FrameIconExample frame = new FrameIconExample();
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        // Set the window size and its title
        frame.setSize(new Dimension(500, 500));
        frame.setTitle("Frame Icon Example");

        // Read the image that will be used as the application icon.
        // Using "/" in front of the image file name will locate the
        // image at the root folder of our application. If you don't
        // use a "/" then the image file should be on the same folder
        // with your class file.
        try {
            URL resource = frame.getClass().getResource("/logo.png");
            BufferedImage image = ImageIO.read(resource);
            frame.setIconImage(image);
        } catch (IOException e) {
            e.printStackTrace();
        }

        // Display the form
        frame.setVisible(true);
    }
}
Change JFrame Image Icon

Change JFrame Image Icon