Talk About Network

Google


Register and Login
Nick
Password
Register create new account Sign up is FREE and you can post replies, new topics, bookmark posts and more!
Recover lost password


Programming > Java Help > Re: problem: se...
Latest [ Topics | Posts ] Archive Post A New Topic Post a Reply
<< Topic < Post Post 9 of 15 Topic 16050 of 16192
Post > Topic >>

Re: problem: security using IDE's appletviewer

by bH <bherbst65@[EMAIL PROTECTED] > May 7, 2008 at 12:52 PM

On May 7, 12:26=A0pm, Knute Johnson <nos...@[EMAIL PROTECTED]
>
wrote:
> bH wrote:
> > On May 7, 1:41 am, Knute Johnson <nos...@[EMAIL PROTECTED]
>
> > wrote:
> >> bH wrote:
> >>> Hi Knute,
> >>> You wrote "If you jar up your Applet, access the
> >>> image file with; getImage(getClass().getResource
> >>> ("fname.jpg"));
> >>> The applet is correctly jar'd along with the image
> >>> and shows as expected when the jar is opened.
> >>> I have tested to see that it does work.
> >>> I do not know what, if anything, goes into the ()
> >>> of getImage(getClass().getResource())
> >>> to exctract only the image from the jar by itself,
> >>> so that the image can go into
> >>> another program in the same folder.
> >>> im****t java.awt.*;
> >>> im****t java.applet.Applet;
> >>> im****t java.awt.Image;
> >>> public class ImageAppletBriefX extends Applet
> >>> =A0 {
> >>> =A0 private Image ioStream;
> >>> =A0 private String errorMessage =3D null;
> >>> =A0 public void init() {
> >>> =A0 =A0 try
> >>> =A0 =A0 =A0 {
> >>> =A0 =A0 =A0 // the jar containing the image is
> >>> =A0 =A0 =A0 //"TestLoadImage.jar"
> >>> =A0 =A0 =A0 // the image file in the jar is "JBsm.JPG"
> >>> =A0 =A0 =A0 ioStream =3D getImage(getClass().getResource());
> >>> =A0 =A0 =A0 // << the line in question is above
> >>> =A0 =A0 =A0 repaint();
> >>> =A0 =A0 =A0 }
> >>> =A0 =A0 catch (Exception netProblem )
> >>> =A0 =A0 =A0 {
> >>> =A0 =A0 =A0 errorMessage =3D "Could not reach image";
> >>> =A0 =A0 =A0 }
> >>> =A0 =A0 }
> >>> =A0 public void paint( Graphics display)
> >>> =A0 =A0 {
> >>> =A0 =A0 if ( errorMessage =3D=3D null )
> >>> =A0 =A0 =A0 display.drawImage( ioStream, 0, 0, this );
> >>> =A0 =A0 else
> >>> =A0 =A0 =A0 display.drawString( errorMessage, 10, 10 );
> >>> =A0 =A0 }
> >>> =A0 }
> >>> Thanks for your help up to this point
> >>> bH
> >> I'm not exactly clear what your problem is here. =A0But I will give
you=
 a
> >> complete example. =A0Assume you have an image file named
"kittens.jpg" =
and
> >> you want to display it in your Applet. =A0Furthermore you want to
deplo=
y
> >> your Applet from a .jar file with the code and image store in the
.jar.=

>
> >> im****t java.applet.*;
> >> im****t java.awt.*;
>
> >> public class test1 extends Applet {
> >> =A0 =A0 =A0Image image;
>
> >> =A0 =A0 =A0public void init() {
> >> =A0 =A0 =A0 =A0 =A0image =3D
getImage(getClass().getResource("kittens.j=
pg"));
> >> =A0 =A0 =A0}
>
> >> =A0 =A0 =A0public void paint(Graphics g) {
> >> =A0 =A0 =A0 =A0 =A0g.setColor(Color.RED);
>
> >> =A0 =A0 =A0 =A0 =A0if (!g.drawImage(image,0,0,this))
> >> =A0 =A0 =A0 =A0 =A0 =A0 =A0g.drawString("Loading Image",10,20);
> >> =A0 =A0 =A0}
>
> >> }
>
> >> Compile the code above. =A0Jar up the file with the following
command;
>
> >> jar cvfM test1.jar test1*.class kittens.jpg
>
> >> This stores all class files from the test1 class and the image file
int=
o
> >> the jar.
>
> >> <html>
> >> =A0 =A0 =A0<head>
> >> =A0 =A0 =A0</head>
> >> =A0 =A0 =A0<body>
> >> =A0 =A0 =A0 =A0 =A0<applet archive=3D"test1.jar" code=3D"test1.class"
> >> =A0 =A0 =A0 =A0 =A0 width=3D"640" height=3D"480">
> >> =A0 =A0 =A0 =A0 =A0</applet>
> >> =A0 =A0 =A0</body>
> >> </html>
>
> >> Create the html file above, I called mine test1.html.
>
> >> Now run the appletviewer or load the html file with your browser;
>
> >> appletviewer test1.html
>
> >> The appletviewer/browser will load the .jar file and run the
> >> test1.class, reading the kittens.jpg image file from the .jar and
> >> displaying it. =A0Until the image is completely loaded the message
> >> "Loading Image" will be drawn onto the Applet as well.
>
> >> You do not need a repaint() call if you are using the
> >> ImageProducer/ImageObserver scheme.
>
> >> If that is not what you needed, then please post again.
>
> >> --
>
> >> Knute Johnson
> >> email s/nospam/linux/
>
> >> --
> >> Posted via NewsDemon.com - Premium Uncensored Newsgroup Service
> >> =A0 =A0 =A0 ------->>>>>>http://www.NewsDemon.com<<<<<<------
> >> Unlimited Access, Anonymous Accounts, Uncensored Broadband Access-
Hide=
 quoted text -
>
> >> - Show quoted text -
>
> > Hi Knute,
> > I was able to accomplish your html model above earlier
> > and it did show the image as the original applet did,
> > Thank you for your html gift above.
>
> > Now for the rest of it. I was hoping that I might extract the
> > image "kittens.jpg" ONLY from the "test1.jar" and use the
> > the image in another applet. All be it by coding differently in a
> > second
> > applet, and make "kittens.jpg" appeared as coming from the jar.
>
> > I guess that what I was trying to do was make some sense out of
> > what Mark Space was saying above....
> > "Make this image into a resource, and use
> > getResourceAsStream(). =A0That's the correct way to package extra
files
> > with an applet."
> > Can this be changed to reflect getting the image from the jar?
> > image =3D getImage(getClass().getResource("kittens.jpg"));
>
> getResourceAsStream() just gets you the image data in a stream as
> opposed to the URL. =A0That won't help you with your question.
>
> > Any possibility of coding to get just the image ("kittens.jpg") into
> > another applet using that with the idea that Mark Space is saying.
> > If that is not what he was suggesting then there is nothing more.
>
> > Thanks for your prompt reply.
>
> > bH
>
> Yes. =A0You can specify many .jar files in the ARCHIVE parameter of the
> APPLET tag. =A0Just separate them with commas.
>
> <html>
> =A0 =A0 =A0<head>
> =A0 =A0 =A0</head>
> =A0 =A0 =A0<body>
> =A0 =A0 =A0 =A0 =A0<applet archive=3D"test1.jar,test2.jar"
code=3D"test2.c=
lass"
> =A0 =A0 =A0 =A0 =A0 width=3D"640" height=3D"480">
> =A0 =A0 =A0 =A0 =A0</applet>
> =A0 =A0 =A0</body>
> </html>
>
> The HTML above loads both the test1.jar and test2.jar and runs the class
> test2. =A0The code for test2.java is almost the same as test1.java.
>
> im****t java.applet.*;
> im****t java.awt.*;
>
> public class test2 extends Applet {
> =A0 =A0 =A0Image image;
>
> =A0 =A0 =A0public void init() {
> =A0 =A0 =A0 =A0 =A0image =3D
getImage(getClass().getResource("kittens.jpg"=
));
> =A0 =A0 =A0}
>
> =A0 =A0 =A0public void paint(Graphics g) {
> =A0 =A0 =A0 =A0 =A0g.setColor(Color.BLUE);
>
> =A0 =A0 =A0 =A0 =A0if (!g.drawImage(image,0,0,this))
> =A0 =A0 =A0 =A0 =A0 =A0 =A0g.drawString("Loading Image",10,20);
> =A0 =A0 =A0}
>
> }
>
> --
>
> Knute Johnson
> email s/nospam/linux/
>
> --
> Posted via NewsDemon.com - Premium Uncensored Newsgroup Service
> =A0 =A0 =A0 ------->>>>>>http://www.NewsDemon.com<<<<<<------
> Unlimited Access, Anonymous Accounts, Uncensored Broadband Access- Hide
qu=
oted text -
>
> - Show quoted text -

Hi Knute,

Sorry but I cannot put this away because I cannot understand
something.
You have the image in a ("kittens.jpg") in a jar that has the name
"KnutesTest1.jar" (I made that name up here for the discussion).

I am now going to run your "test2" and I use your program above that
is supposed to access "KnutesTest1.jar" to grab the image
"kittens.jpg".

Yet in "test2" there is no clue that I can see where it is find the
image
you referred in test2:

"image =3D getImage(getClass().getResource("kittens.jpg"));"

It can't grab resources that, I don't think, that
are not stated.

Can you please clarify?

TIA,

bH
 




 15 Posts in Topic:
problem: security using IDE's appletviewer
bH <bherbst65@[EMAIL P  2008-05-05 06:49:23 
Re: problem: security using IDE's appletviewer
Mark Space <markspace@  2008-05-05 09:26:16 
Re: problem: security using IDE's appletviewer
Knute Johnson <nospam@  2008-05-05 15:02:05 
Re: problem: security using IDE's appletviewer
Roedy Green <see_websi  2008-05-06 05:19:44 
Re: problem: security using IDE's appletviewer
bH <bherbst65@[EMAIL P  2008-05-06 21:14:28 
Re: problem: security using IDE's appletviewer
Knute Johnson <nospam@  2008-05-06 22:41:20 
Re: problem: security using IDE's appletviewer
bH <bherbst65@[EMAIL P  2008-05-06 23:15:05 
Re: problem: security using IDE's appletviewer
Knute Johnson <nospam@  2008-05-07 09:26:35 
Re: problem: security using IDE's appletviewer
bH <bherbst65@[EMAIL P  2008-05-07 12:52:20 
Re: problem: security using IDE's appletviewer
Knute Johnson <nospam@  2008-05-07 13:09:04 
Re: problem: security using IDE's appletviewer
bH <bherbst65@[EMAIL P  2008-05-07 19:12:12 
Re: problem: security using IDE's appletviewer
Knute Johnson <nospam@  2008-05-07 22:16:30 
Re: problem: security using IDE's appletviewer
bH <bherbst65@[EMAIL P  2008-05-07 23:20:54 
Re: problem: security using IDE's appletviewer
Lew <lew@[EMAIL PROTEC  2008-05-08 06:47:22 
Re: problem: security using IDE's appletviewer
bH <bherbst65@[EMAIL P  2008-05-08 04:29:24 

Post A Reply:
  Go here to Signup

AddThis Feed Button


About - Advertising - Contact - Frequently Asked Questions - Privacy Policy - Terms of Use - Signup

Contact
tan12V112 Sat Jul 5 19:25:09 CDT 2008.