save image

[vijayalakshmi sundararajan]

Hi,
I have written a program that will draw a line.
I want a save button which would help me to save the picture in GIF or JPG format.
the program that I hv written to draw the lines is as below:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Lines extends JFrame
{
private String s = (" Using javaStrings ");
public Lines()
{
super(" Drawing Lines ");
setSize(500,165);
show();
}
public void paint( Graphics g)
{
g.setColor(Color.blue);
g.fillRect(20,120,50,5);
g.setColor(Color.blue);
g.fillRect(100,120,50,5);
g.setColor(Color.blue);
g.fillRect(170,120,50,5);
g.setColor(Color.blue);
g.fillRect(240,120,50,5);
g.setColor(Color.blue);
g.fillRect(300,120,50,5);
g.setColor(Color.green);
g.fillRect(70,100,30,5);
g.setColor(Color.green);
g.fillRect(150,100,20,5);
g.setColor(Color.green);
g.fillRect(220,100,20,5);
g.setColor(Color.green);
g.fillRect(290,100,10,5);
g.setColor(Color.red);
g.fillRect(20,150,350,5);

}
public static void main(String[] args)
{
Lines app= new Lines();
app.addWindowListener( new WindowAdapter ()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
}
);
}
}
Kindly help me out in saving the image that is been displayed after running this program.
Regards,
Vijju

[Jose Botella]

Welcome to the Ranch Vijju.
I have modified you program to write to a file Lines.jpg
I do not know if it is the best way.
The example uses com.sun.image.codec.jpeg clases, for which there is no API. You can look at the source code by something like jar -tvf c:\j2sdk1.4.2_01\src.zip com/sun/image/codec/jpeg

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.image.*;
import com.sun.image.codec.jpeg.*;
import java.io.*;
public class Lines extends JFrame {
  private String s = (" Using javaStrings ");
  BufferedImage bi = new BufferedImage(500, 165, BufferedImage.TYPE_INT_RGB);
  public Lines() {
    super(" Drawing Lines ");
    paintToImage();
    setSize(500,165);
    show();
    FileOutputStream fos = null;
    try {
      fos = new FileOutputStream("Lines.jpg");
      JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(fos);
      encoder.encode(bi);
      System.out.println("Lines.jpg was created");
    } catch(Exception e) {
        System.out.println("Unable to create Lines.jpg");
    } finally {
        try { fos.close(); } catch(Exception ex) { }
    }
  }
  private void paintToImage() {
    Graphics g = bi.getGraphics();
    g.setColor(Color.white);
    g.fillRect(0, 0, 500, 165);
    g.setColor(Color.blue);
    g.fillRect(20,120,50,5);
    
    g.setColor(Color.blue);
    g.fillRect(100,120,50,5);
    
    g.setColor(Color.blue);
    g.fillRect(170,120,50,5);
    
    g.setColor(Color.blue);
    g.fillRect(240,120,50,5);
    
    g.setColor(Color.blue);
    g.fillRect(300,120,50,5);
    
    g.setColor(Color.green);
    g.fillRect(70,100,30,5);
    
    g.setColor(Color.green);
    g.fillRect(150,100,20,5);
    
    g.setColor(Color.green);
    g.fillRect(220,100,20,5);
    
    g.setColor(Color.green);
    g.fillRect(290,100,10,5);
    
    g.setColor(Color.red);
    g.fillRect(20,150,350,5);
  }
  public void paint( Graphics g) {
    g.drawImage(bi, 0, 0, this);
  }
  public static void main(String[] args) {
    Lines app= new Lines();
    app.addWindowListener( new WindowAdapter () {
        public void windowClosing(WindowEvent e) {
          System.exit(0);
        }
      }
    );
  }
}

[ December 08, 2003: Message edited by: Jose Botella ]