I implemented the java applet application. I searching for the process of how to create the executable file for this application.I am not find any good solution. Please can anybody help me.
thanks
The executable of a Java applet is either a .jar file, or the .class directory.
You execute a Java applet within a web page. You place the .jar file or the .class directory in your web directory structure.
Here's an example HTML applet:
<applet code=NameOfApplet.class name=NameOfApplet archive=NameOfApplet.jar
width=300 height=300>
<param name="bgcolor" value="ffffff">
<param name="fontcolor" value="000000">
Your browser is not Java enabled.
</applet>
Further information can be found at How to Make Applets.
It's been a while since I've had to code an applet, but the archive parameter can include directories.
Instead of creating an Applet or JApplet, create a JFrame.
Jar the classes.
Add a manifest file that specifies the main-class
Double click the Jar to launch.
If you would like to make it a nicer experience for the end user, create a web page that uses deployJava.js to check that a suitable JRE is installed, then launch the JFrame using Java Web Start.
Otherwise, if you want to run the applet outside the browser, you can create the JAR file normally and then user appletviewer to launch it.
Executable applet is nothing but the .class file of the applet, which is obtained by compiling the source code of the applet. Compiling an applet is exactly the same as compiling an application. Therefore, we can use the Java compiler to compile the applet.
Assume that we have created a file called HelloJava.java for our applet. Here are the steps required for compiling the HelloJava applet.
Move to the directory containing the source code and type the following command: javac HelloJava.java
The compiled output file called HelloJava.class is placed in the same directory as the source.
If any error message is received, then we must check for errors, correct them and compile the applet again.
Related
At my school I am using Notepad++ to write an applet, and I need to package it in a jar so I can sign it. I am attempting to do this with a batch file like this:
CD C:\Users\name\Java\bin
javac className.java
jar cvfm className.jar Manifest.txt classFolder
java -jar className.jar
PAUSE
And then I get a main method not found exception. There is not much I can do in terms of debugging, or opening up my jar, because as I said before, it is at school and so much of the functionality is blocked. I can provide more details if needed, thanks.
Applets don't have a main method, so you cannot run it in the conventional way with the java command.
To run the applet, create an HTML file with the applet in it, and run appletviewer or view the page in a web browser.
You shouldn't run an applet that way. It's not an application to run via the java command, and usually doesn't have a main method (unless you're writing some dual-purpose program). Run it with HTML code. The applet tutorial will show you this, and surely you've read this already.
I build project in eclipse - swing applet and now I'm trying to run it in a browser.
I have 3 packages, let's say they are called: "pkgApplet", "pkgFirst", "pkgSecond" with .class files. In pkgApplet I have class "main" with method main(). No matter what I do, I can't run this applet in browser. Currently my html code looks like this
<applet code="bin/pkgApplet/main" height="1000" width="1000"/>
Browser gives this error every time no matter how I modify applet tag:
NoClassDefFoundError with message bin/pkgApplet/main(wrong name: applet/main)
I tried using codebase attribute, packing applet into .jar file and using archive attribute, but nothing seems to work. Do you have any idea what am I doing wrong?
Your applet format should be:
<applet codebase="bin" code="pkgApplet.main" height="1000" width="1000"></applet>
bin is the default target directory (for Eclipse) so will require the codebase attribute as shown above. For this to work, your HTML file needs to be located in your project directory.
Note classes in Java start with uppercase, while package names are lowercase. Also its helpful to name classes describing what they do. You could have instead:
<applet codebase="bin" code="pkgapplet.MyMainApplet" height="1000" width="1000"></applet>
Do you realize that nothing in main will be called by your applet client? Any startup functionality should be placed in the init method.
I created an applet using the iaik libraries it works perfectly in my applet viewer but in my web browser I get this: trusted loader attempted to load sandboxed resource any idea ?
Amm ok so I got it to work but I would like to also know why ... I am using netbeans ... after I set the option for self signed I compiled and in my dist folder it created a jar file with my classes...after that I copied my jar file, libs ...etc. to the folder with my applet ... and ran it ... so what does the sandbox ment and how come I do not get it anymore... I also copied that PKCS11Wrapper to my jdk/bin folder....
The problems is appear because your applet tried to access to native library and your applet has to be signed, BUT you've written that you sign it, so, if you place the code in the jre/lib/ext directory, signing the code is not required, try to create console application from applet and try to start it. I think you will see that all is work , and your IDE signature is not working. How to start applet from main method
I have created an applet and made its jar file in Netbeans. i am using a jar file in an applet.
I am calling the applet.jar in a jsp page. The applet works fine but the functionality it has to be achieved is through the another jar file which i was using in that applet. means how to include an external jar file in applet.jar so that it could also be available to that jsp page also when i will run the jsp page.
If you just need to make a jar file available to your applet code, you can just host it from your server and reference it in the <applet> tag. That might be easier than combining the jars, and easier to maintain.
There's a nice overview here, from which I take this example:
<applet code="main.class" codebase="/java" width="100" height="100" archive="applet.zip">
</applet>
...makes the classes in /java/applet.zip available to your application.
Update - the information about the APPLET tag in the Sun/Oracle documentation is comprehensive and easy to follow, i.e. http://docs.oracle.com/javase/1.4.2/docs/guide/misc/applet.html
I have an applet that works alright on this page. It just references the .class file. (unfortunately, I have lost the source, and the jar files.)
I want to reference it here, however it does not start. Probably because it cannot find the class file. the applet tag looks like this
<applet code="/applets/language/LanguageEngineApplet.class" width="1174" Height="402">
<embed code="/applets/language/LanguageEngineApplet.class" width="1174" height="402" type="application/x-java-applet" pluginspage="http://www.java.com/en/download/manual.jsp"/>
</applet>
I know the .class file is there, because I can link to it. So I'm stumped as to why this won't work.
I just put the applet in a page on it's own. The problem was not my Java version, it was the class name and the path and the package interacting somehow. I had to put it in a directory on its own, with the html file that referenced it in that directory.
You may want to look at the Java Deployment Toolkit
If you do decide to embed a Java applet inside WordPress and not outside, I just released a new plugin that easily allows you to do that. It uses shortcodes.
http://huyz.us/2011/the-easiest-way-to-embed-java-in-wordpress/
Hmmm, maybe I have to support uploading *.class files in your case. Let me know, if you need that.