Saving keys in java

Question

Hi,
i have the following problem: i want to save the generated keypair(RSA/DSA/X509) so that i can use it again later. I have to use Base64 for RSA/DSA.
unfortunatly there was little info on the web about those problems (generating keys is good explained), so i am stuck in the middle of nowhere..
can anyone help me solve the problem?

Answer 1

I found this solution on http://forum.java.sun.com/. It is embarrassingly simple:
import java.awt.*;
import java.awt.image.*;
import java.io.*;
import javax.imageio.*;
import javax.swing.*;
public class SaveSwing
public static void main(String[] args)
JFrame jframe = new JFrame("Hello there!");
jframe.setBounds(100, 100, 300, 200);
Container cp = jframe.getContentPane();
cp.add(new JLabel("Can you save me?"));
jframe.show();
BufferedImage image = new BufferedImage(cp.getWidth(), cp.getHeight(),
BufferedImage.TYPE3BYTEBGR);
cp.paint(image.getGraphics());
try { ImageIO.write(image, "jpg", new File("jframe.jpg")); }
catch(Throwable thr) { thr.printStackTrace(); }
System.exit(0);
}