putting an image to an application

[Andew]

Hi I'm new to Java, and I am reading some books and sample codes on how to
put up an image to an application. However most of this codes illustrate
using applet and they use the graphics.paint method. How do I do that in
an application?

[Paul Clapham]

The same way, if you are using the java.awt classes.

PC2

Andew <ong_tt@yahoo.com> wrote in message news:3aac9bb4$1@news.devx.com...
>
> Hi I'm new to Java, and I am reading some books and sample codes on how to
> put up an image to an application. However most of this codes illustrate
> using applet and they use the graphics.paint method. How do I do that in
> an application?

[andrew]

Hi Paul, I have tried that without any success. I would appreciate very much
if you can show me an example. Either a post or an email. Thanks in advance.

"Paul Clapham" <pclapham@core-mark.com> wrote:
>The same way, if you are using the java.awt classes.
>
>PC2
>

[Paul Clapham]

To tell you the truth, I've been working on an application for over a year
now, it has close to 300 classes, and I've never used the graphics.paint
method. So I don't understand what your actual problem is. Applications
and applets use the identical methods to display images. So that isn't your
problem. Perhaps you could ask a more specific question?

PC2

andrew <ong_tt@yahoo.com> wrote in message news:3aad804c$1@news.devx.com...
>
> Hi Paul, I have tried that without any success. I would appreciate very
much
> if you can show me an example. Either a post or an email. Thanks in
advance.
>
> "Paul Clapham" <pclapham@core-mark.com> wrote:
> >The same way, if you are using the java.awt classes.
> >
> >PC2
> >
>

[Puneet Wadhwa]

Dear Paul,
Even I have the same problem, about drawing an image on an application (not
an applet..) Actually, the paint method has a graphics object, so we can
use it to draw in case of applets..Whereas in case of application we can't
access methods such as getDocumentBase and getImage from inside the static
main method..
I am pasting an example of code where I tried desperately to make this thing
work, but maximum i could get it to compile..but it throws a NullPointerException
while running.


import java.awt.*;
import java.applet.*;
import java.io.*;
import java.net.*;
import java.awt.event.*;

public class Notepad extends Applet implements ActionListener, WindowListener
{
static Frame f;
static FileDialog fd,fd1;
static TextArea ta;
static Font fn=new Font("Courier",0,14);
static MenuItem m1,m2,m3,m4,m5,m6,m7,m8,cut,paste,copy,delete,about;
static Menu m,help;
static MenuBar mbar;
static String cuttext="",txtmsg="";
static int getcaretpos=0,setcaretpos=0;
static Image img;
static boolean imgflag=false;
static Graphics offG;

/* Notepad(String s)
{
super(s);
}*/

public void windowOpened(WindowEvent we){}
public void windowActivated(WindowEvent we){}
public void windowDeactivated(WindowEvent we){}
public void windowClosed(WindowEvent we){}
public void windowIconified(WindowEvent we){}
public void windowDeiconified(WindowEvent we){}


public static void main(String args[])
{
Notepad f=new Notepad();
f.setBounds(50,50,300,300);
f.addWindowListener(f);
fd=new FileDialog(f,"Open..",FileDialog.LOAD);
fd1=new FileDialog(f,"Save As..",FileDialog.SAVE);
mbar=new MenuBar();
f.setMenuBar(mbar);

m1=new MenuItem("New");
m2=new MenuItem("Save..");
m3=new MenuItem("Open");
m4=new MenuItem("Print");
m5=new MenuItem("Exit");
m5.addActionListener(f);
m4.addActionListener(f);
m3.addActionListener(f);
m2.addActionListener(f);
m1.addActionListener(f);
Menu m=new Menu("File");
help=new Menu("Help");
about=new MenuItem("About");
m.add(m1);
m.add(m2);
m.add(m3);
m.add(m4);
m.addSeparator();
m.add(m5);

m6=new MenuItem("Red");
m7=new MenuItem("Blue");
m8=new MenuItem("Green");
m6.addActionListener(f);
m7.addActionListener(f);
m8.addActionListener(f);

Menu edit=new Menu("Edit");
Menu colors=new Menu("Colors");
cut=new MenuItem("Cut");
paste=new MenuItem("Paste");
copy=new MenuItem("Copy");
delete=new MenuItem("Delete");

cut.addActionListener(f);
paste.addActionListener(f);
copy.addActionListener(f);
delete.addActionListener(f);
about.addActionListener(f);

colors.add(m6);
colors.add(m7);
colors.add(m8);
edit.add(colors);
edit.addSeparator();
edit.add(cut);
edit.add(copy);
edit.add(paste);
edit.add(delete);
help.add(about);
mbar.add(m);
mbar.add(edit);
mbar.add(help);

ta=new TextArea(5,4);
ta.setFont(fn);
f.add(ta);
f.setVisible(true);
}

public void paint(Graphics g)
{
if (imgflag==true)
{
g.drawImage(img,0,0,f);
}
}

public void windowClosing(WindowEvent we)
{
System.exit(0);
System.out.println("Exiting..");
}

public void actionPerformed(ActionEvent e)
{
if (e.getSource()==m5)
{
System.exit(0);
}

if (e.getSource()==copy)
{
cuttext=ta.getSelectedText();
}

if (e.getSource()==cut)
{
cuttext=ta.getSelectedText();
int cutlen=cuttext.length();
}

if (e.getSource()==paste)
{
getcaretpos=ta.getCaretPosition();
ta.insertText(cuttext,getcaretpos);
}

if (e.getSource()==about)
{
String imgname="mynotepad.gif";
offG=f.getGraphics();
try
{
img=getImage(showDocumentBase(),imgname);
offG.drawImage(img);
}
catch(Exception ure)
{System.out.println("Exception caught");}

imgflag=true;
repaint();
}
if (e.getSource()==m1)
{
ta.setText("");
}

if (e.getSource()==m3)
{
txtmsg="";
fd.setVisible(true);
String filename=fd.getFile();
String dirname=fd.getDirectory();
File openfile=new File(dirname,filename);

try
{
FileInputStream fis=new FileInputStream(openfile);
int bytelength=fis.available();
for (int bytecount=0;bytecount<bytelength;bytecount++)
{
char fch=(char)fis.read();
txtmsg=txtmsg+fch;
}
ta.setText(txtmsg);
}
catch(Exception ioe)
{
System.out.println("An exception has occured");
}
}
if (e.getSource()==m6)
{
ta.setBackground(new Color(255,204,255));
ta.setForeground(new Color(0,0,102));
repaint();
}
if (e.getSource()==m7)
{
ta.setBackground(new Color(153,204,255));
ta.setForeground(Color.black);
repaint();
}
if (e.getSource()==m8)
{
ta.setBackground(new Color(204,255,204));
ta.setForeground(Color.black);
repaint();
}
if (e.getSource()==m2)
{
fd1.setVisible(true);
}
}
}



"Paul Clapham" <pclapham@core-mark.com> wrote:
>To tell you the truth, I've been working on an application for over a year
>now, it has close to 300 classes, and I've never used the graphics.paint
>method. So I don't understand what your actual problem is. Applications
>and applets use the identical methods to display images. So that isn't
your
>problem. Perhaps you could ask a more specific question?
>
>PC2
>
>andrew <ong_tt@yahoo.com> wrote in message news:3aad804c$1@news.devx.com...
>>
>> Hi Paul, I have tried that without any success. I would appreciate very
>much
>> if you can show me an example. Either a post or an email. Thanks in
>advance.
>>
>> "Paul Clapham" <pclapham@core-mark.com> wrote:
>> >The same way, if you are using the java.awt classes.
>> >
>> >PC2
>> >
>>
>
>