Create multi tiff image

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
 
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriter;
 
import com.sun.media.imageioimpl.plugins.tiff.TIFFImageWriterSpi;
 
public class Tiff {
 
    public static void createMultiImage(BufferedImage[] images, File dest) throws IOException {
        ImageIO.scanForPlugins();
 
        ImageWriter iw = new TIFFImageWriterSpi().createWriterInstance();
 
        if (iw != null && iw.canWriteSequence()) {
            iw.setOutput(ImageIO.createImageOutputStream(dest));
 
            iw.prepareWriteSequence(null);
 
            for (BufferedImage img : images) {
                iw.writeToSequence(new IIOImage(img, null, null), null);
            }
 
            iw.endWriteSequence();
        }
    }
 
}

required package : https://jai-imageio.dev.java.net/

Sending Basic authentication using URL

URL url = new URL(“location address”);
URLConnection conn = url.openConnection();
String authorizationString = "Basic" + Base64.encode("username:password");
conn.setRequestProperty ("Authorization", authorizationString);
InputStream in = conn.getInputStream();

OR

Authenticator.setDefault (new Authenticator() {
    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication ("username", "password".toCharArray());
    }
});