I have a java SE project or you can say applet, but i want to run this applet in web browser how is it possible?
I need to copy jar file something like this i came to know but what is the possible solution?
This tutorial pretty much covers everything from writing your applet to embedding it on your web page. If you already have your applet done, as it seems, scroll down to "Invoking an applet". Here's the code from the tutorial for a quick solution:
<html>
<title>The Hello, World Applet</title>
<hr>
<applet code="HelloWorldApplet.class" width="320" height="120">
If your browser was Java-enabled, a "Hello, World"
message would appear here.
</applet>
<hr>
</html>
Most modern browsers no longer support Java.
In September 2015, Google decided to remove the support for Java in their Chrome web browser. The Java plugin is based on an old API called Netscape Plugin API that has always had security issues. Google felt that it was time for them to let go of this old technology and make the Web move on to newer and safer technologies like HTML5. When you visit a website or web service that is using Java, you now see a message that says: "The Chrome browser does not support NPAPI plug-ins and therefore will not run all Java content. Switch to a different browser (Internet Explorer or Safari on Mac) to run the Java plug-in."
The Java plug-in for web browsers relies on the cross platform plugin architecture NPAPI, which has been supported by all major web browsers for over a decade. Google's Chrome version 45 (released in September 2015) dropped support for NPAPI, impacting plugins for Silverlight, Java, Facebook Video and other similar NPAPI based plugins. Java applications are now offered though web browsers as either a web start application (which do not interact with the browser once they are launched) or as a Java applet (which might interact with the browser). This change does not affect Web Start applications, it only impacts applets.
If you have problems accessing Java applications using Chrome, Oracle recommends using Internet Explorer or Safari instead.
Developers and System administrators looking for alternative ways to support users of Chrome should see this blog regarding Launching Web Start applications.
Related
I come from a C# background. We have something called a WebBrowser control that can load HTML Pages and interact with Javascript using C#.
I would like to interact with an HTML / Javascript page using Java. Are there any well known WebBrowser controls/objects or libraries for Java?
https://docs.oracle.com/javafx/2/webview/jfxpub-webview.htm
I think this is the widget you're looking for. From the official JavaFX website.
There are many options including commercial and open-source solutions.
JavaFX
JavaFX is available in Java 8-10. It provides the WebView control that you can embed into your JavaFX application to display HTML and web pages. It's based on WebKit and renders HTML off-screen using Java Graphics API. It's lightweight. In Java 11 JavaFX is no longer available. It was extracted into a separate project — OpenJFX.
Runs on Windows, macOS, Linux.
JxBrowser
It's a commercial library. It provides the BrowserView controls for Swing, JavaFX, SWT. It's based on Chromium, so the modern web pages look exactly as in Google Chrome. It supports two rendering modes: off-screen (lightweight) and hardware accelerated (GPU-accelerated, heavyweight).
Runs on Windows, macOS, Linux, Linux 64-bit ARM.
JCEF
It's an open-source library that represents Java port for CEF (C/C++). As far as I know it supports only Swing. It's based on Chromium, so the modern web pages look exactly as in Google Chrome.
Runs on Windows, macOS, Linux.
What's the difference?
In 2018 Sebastian Barth compared different Java libraries including JavaFX, JCEF, JxBrowser etc. and shared the results in the Browser Integration in Java Applications article.
One more option - https://github.com/shannah/webviewjar - very thin library, leverages the OS-built in browser, so the entire library is less than 1mb - and that's with macOS, Windows, and Linux native shims all in one jar.
i have applet tag that have the following
<applet id="ZFComponent"
codebase="java.code.webcomponents.ZFApplet" archive="ZFApplet.jar" width="0" height="0">
This browser does not support Embed.
</applet>
and i want to use embed tag instated to make it work in Mozilla family of browsers
You have to specify the class that you want do embed from the jar file.
Like this:
<applet id="ZFComponent" ARCHIVE="ZFApplet.jar" CODE="ZFApplet.class" width="0" height="0">
This browser does not support Embed.
</applet>
This is assuming the class you want to embed is ZFApplet.
EDIT: The above code will work on some browsers but it is going extinct because using applet tags introduces a lot of security risks. Chrome no longer supports the applet tag and you should only be running Java in Chrome through Java Web Start (and even with that it prompts the user about running Java.)
See the notice on Oracle's site:
Chrome no longer supports NPAPI (technology required for Java applets)
The Java plug-in for web browsers relies on the cross platform plugin architecture NPAPI, which has been supported by all major web browsers for over a decade. Google's Chrome version 45 (scheduled for release in September 2015) drops support for NPAPI, impacting plugins for Silverlight, Java, Facebook Video and other similar NPAPI based plugins.
Java applications are offered through web browsers as either a web
start application (which do not interact with the browser once they
are launched) or as a Java applet (which might interact with the
browser). This change does not affect Web Start applications, it only
impacts applets.
If you have problems accessing Java applications using Chrome, Oracle
recommends using Internet Explorer (Windows) or Safari (Mac OS X)
instead.
Happy Coding!
I have made and compiled a Java applet and run it using java appletviewer. It is running fine as expected. But I am not able to run it usingany web browser like chrome or internet explorer even after enabling java. I have viewed lots of pages and forums with people facing the same problem with no use. My html code is:
`<html>
<head>
<title> Calculator </title>
<!--<meta name="discription" content="MultiPurpose Calculator">
<meta name="keywords" content="standard calculator;scientific calculator;loan calculator;calculator;applet">-->
</head>
<Applet code="cal3.class" width=500 height=600>
</Applet>
</html>`
cal3 is the name of the compiled java class. Thank you in advance!!
tl;dr
Wrap your Java applet in a JNLP file to be served as a Java Web Start app.
Oracle no longer supports Java Applet technology
Oracle officially deprecated the Applet API in JEP 289 for Java 9. The appletviewer tool is also deprecated. These are not marked for deletion in the next version after Java 9, but may go away in later versions.
Browsers no longer support Java Applet
Embedding Java Applets within web browsers has proven to be an insoluble security problem. The industry has given up on trying to make this work. Ditto for Flash and Silverlight.
Google Chrome browser no longer supports the NPAPI plugin architecture, and therefore no longer supports Java Applet technology.
Microsoft Edge web browser does not support plugins such as that needed for Java Applet.
Mozilla Firefox browser dropped support for the NPAPI plugin architecture, and therefore Java Applet, in version 52 and later. See this Question on SuperUser.StackExchange.com. For older versions, Mozilla gives instructions on how to disable Java Applet.
Apple has been taking steps to phase out Java Applet support for years. This includes giving directions to disable the necessary plugin, as well as defaulting to disabling, and later omitting, the necessary plugin. Now Safari 11 has no direct support, though you might get it to work by mimicking a Microsoft Internet Explorer browser as described here.
And speaking of Microsoft Internet Explorer browsers, you might be able to get Java Applet to work. Try these instructions. I do not recommend doing so.
Java Web Start
I do not recommend using Java Applets.
Instead, learn about Java Web Start technology. You get the convenience of obtaining and launching Java apps via the web browser, but the actual app runs as a separate local app on the user’s machine rather than inside the browser.
For security, they run by default in the same kind of limited “sandbox” as Java Applets. This sandbox restricts access to the various features of the host OS and hardware. You can take measures to relax the security restrictions, as appropriate to the needs of your app.
Wrap your applet
You can even wrap an existing Java Applet in a jar file with a JNLP file to deploy as a Java Web Start app.
Oracle and the Java community continue to actively support and advance Java Web Start, including an update to the JNLP spec in 2017-09.
Your code is okay the problem is on he browser. Most browsers now days are ending support for java. Browsers don't allow and don't support java code to run, like running applets on the browser. The good old days of java code on browser has come to an end. Newer version and updates of HTML are killing java same they did with flashplayer.
Maybe Internet Explorer might be a good option in this case.
Google has recently announced their intentions to remove client-side Java support from Chrome in the near future. I, a Java developer by nature, have built nearly all of my web-based applications on top of some form of Java.
As such, I am looking for a workaround for Chrome's discontinuation of Java support, without having to rewrite all of my client-side web apps from the ground-up in another language.
Furthermore, I'm searching for a workaround which does not require Chrome's built-in NPAPI workarounds, as I need basic users to be able to continue to use the applets as they are.
The best option I'm aware of is Java Web Start (tutorial), which doesn't run in browser but does allow users to easily run a Java application you serve from a website. Oracle provides some documentation on how to migrate to JWS, but the gist is to simply replace the <applet> tags with a link to a .jnlp file with the same information the <applet> tag had. You may have to tweak Chrome's application defaults as well.
There is also the Google Web Toolkit, which isn't for applets, but does let you write Java that compiles into JavaScript.
If your applets are more integrated into the browser, unfortunately you may not be able to keep using Java. Chromium does offer some alternatives on their NPAPI deprecation page, but they're not pretty. Options include HTML5/WebGL, WebRTC, NaCL, or Chrome Extensions. The Chrome Experiments site is worth browsing if migrating off of Java becomes your best option.
Oracle's official recommendation, however, is to avoid Chrome. That's pretty heavy-handed, and won't work for most website owners, but it's worth mentioning.
A long time ago I made an applet, when I tried to a open it few days ago in website and it says that there is a security problem and it can not open it.
I Googled it and saw that I need to register it.
I tried to register it but nothing helped.
Can you explain what could make this problem?
The applet is fine and working when I run it from eclipse.
With recent updates to Java, security is much more strict. Your applet needs to be running the same java version and have a certificate. It's a very strict system...I can't open many java applets myself.
To make it run as an exception, copy the URL that the applet is on. Then open up your Java Control Panel, go to the Security Tab, and at the bottom hit Edit Site List at the bottom. From there, hit Add and paste in your link.
That'll allow it to run as an exception.
tl;dr
Java Applets are gone. You can modify your applet to run as a local app instead.
Today you can build local GUI apps in Java using your choice of three frameworks:
Swing (now in maintenance mode)
JavaFX (actively developed, led by Oracle and Gluon)
SWT (developed by the Eclipse Foundation)
For remote apps written in pure Java but delivered to users as a web app, see Vaadin Flow.
Yes, Java Applets are dead
Oracle has deprecated Java Applet technology, having proven too difficult to integrate securely into web browsers.
All the major web browser makers (Mozilla, Apple, Google, Microsoft, etc.) have phased out support for Java Applets.
Long live Java GUI apps
See white paper by Oracle, Java Client Roadmap Update, 2020-05.
Oracle’s vision for local Java GUI apps is for the developer to deliver a "double-clickable" app bundled with its own JVM slimmed down to include only needed parts. Modern tooling includes jlink and jpackage. Oracle no longer sees Java being generally bundled with operating systems, nor generally being installed by users.
While Java Applets are dead, Swing is still maintained as a required part of every Java implementation. People continue to write Swing apps for use on a local computer. You just cannot run a Swing app within a browser any longer. If you have source code for a Swing-based Applet, you can easily modify it to run as a local Swing app.
Swing’s replacement, JavaFX, is under very active development in the open-source project OpenJFX, a subproject hosted on the OpenJDK project. Releases arrive every six months, around the same time as Java releases.
The Eclipse Foundation continues to offer Standard Widget Toolkit (SWT) as a third platform (besides Swing & JavaFX) for writing Java GUI apps on a local computer.
For an open-source implementation of Java Web Start, see OpenWebStart. Oracle has dropped support for the technology, but others continue to find it a handy way to deliver and launch local Java desktop apps.
If you want to write web apps in pure Java using a Swing/JavaFX style of coding, see Vaadin Flow. Your app executes server-side in a JVM while the user-interface is automatically rendered remotely in the web browser by way of standard web technologies (HTML, CSS, JavaScript/ECMAScript/TypeScript, Web Components).