The Applet API is deprecated, no replacement. You'll need to install an older JDK, or modify your software. Share
Is Appletviewer deprecated?
Warning: Applet API and AppletViewer are deprecated. The solution is to stop using applets. They're dead and all time spent upon them is a waste. See also: stackoverflow.com/questions/45535112/…, and openjdk.java.net/jeps/289 and java.com/en/download/faq/jdk9_plugin.xml.
Are Java applets deprecated?
Java applets are deprecated since Java 9. However, in these modern days, we have efficient alternatives for Java Applets. Java applets are special Java programs that were developed to run embedded Java code in Web pages. An applet is launched from the web document HTML code.
Why can't I use Appletviewer in Java 11?
You may have not set the command search path ( $PATH) correctly. This is a common for people who are new to Java; see javac is not recognized as an internal or external command, operable program or batch file You may be trying to use appletviewer in Java 11 or later. This won't work.
Why does the Appletviewer ignore the codebase attribute?
The AppletViewer also ignores the codebase attribute that’s usually included as part of the object tag, assuming that it points to a Java plug-in in a network cab file with a value like: The optional codebase parameter tag supplies a relative URL that specifies the location of the applet class.
Why is a Java applet deprecated?
In short, this is because many main stream browsers had either removed or planned to remove standards based plugin support, therefore Oracle wants Java developers to migrate from Java applets to plugin-free Java Web-start technologies.
How do you fix appletviewer is not recognized?
Check the spelling of the name, or if a path was included, verify that the path is correct and try again. Cmd: 'appletviewer' is not recognized as an internal or external command, operable program or batch file.
Is applet deprecated in Java?
Java Applet and WebStart functionality, including the Applet API, The Java plug-in, the Java Applet Viewer, JNLP and Java Web Start including the javaws tool are all deprecated in JDK 9 and will be removed in a future release.
How do you fix an applet?
Re-launch the web browser. Go to the Java applet. When the "Security Warning" window asking "Do you want to run this application?" appears, if there is a "I accept the risk and want to run this app." option, checkmark it ON first then --> Click the "Run" button. The Java applet should load OK now.
How do I enable appletviewer?
Click Oracle Forms Server. Click Custom. From the list of Available Products, select JDK AppletViewer. Click Install.
How do I run an appletviewer?
To run an applet with the Applet Viewer, enter the following command: appletviewer
What is replacing Java applets?
You can still relive the heyday of Java applets through UltraStudio, an online museum of educational applets, but Java has been mostly replaced by Flash and JavaScript for creating interactive programs on the web.
Why are applets obsolete?
Applets are going to be obsolete when Java 9 comes out, because Oracle will stop distributing and supporting the Java browser plug-in.
Are applets still used in 2021?
No, there isn't. Java Applets are dead and there is no viable way to run them for the vast majority of users on the public Internet.
How do I enable Java applets in Chrome?
You simply enable loading Java applets and all applets on the page will run as normal. This extension requires Javascript be enabled in Chrome. To do so, go to Settings > Advanced > Privacy and security > Site Settings > Javascript, then make sure Allowed is enabled.
Does Java 1.8 support applets?
As announced in 2015, Applets were supported in Java SE 8 until March, 2019. Although support is no longer available for Applets, they remain available for Windows and continue to receive updates in Java SE 8.
How do I fix application blocked by Java security error?
How to resolve "Application blocked by Java security" errorGo to the Control Panel from the Start menu.Double-click on the Java icon to get the Java control panel dialog box.Navigate to the Security Tab.Click the 'Edit Site List' button.Click the Add button in the Exception Site List window.More items...
Overview
In the olden days, applets are the way to embed java code into web browsers. Java applets are deprecated since Java 9. However, in these modern days, we have efficient alternatives for Java Applets.
Error
Error: Could not find or load main class sun.applet.AppletViewer Caused by: java.lang.ClassNotFoundException: sun.applet.AppletViewer
Screenshot
An AppletViewer is a java program that executes java applets that are embedded in web pages.
Java Applet Alternatives
Since, Java Applets are deprecated we will look at some alternatives to run Java code in a web browser.
What is an appletviewer tag?
AppletViewer Tags. The AppletViewer makes it possible to run a Java applet without using a browser. The AppletViewer ignores any HTML that isn’t immediately relevant to launching an applet. However, it recognizes a wide variety of applet-launching syntax.
Is Applet API deprecated?
Although available and supported in JDK 9, the Applet API is marked as deprecated in preparation for removal in a future release. Instead of applets, consider alternatives such as Java Web Start or self-contained applications. Synopsis.
Does AppletViewer recognize Java code?
The AppletViewer doesn’t recognize the java_code, java_codebase, java_object, or java_type param tags. These tags are needed only when the applet defines parameters with the names code, codebase, object, or type, respectively.
rfmejia commented on Feb 9, 2016
Hi, I am a developer working with MassBank from Japan. I was concerned about this as well, I agree that we need to start the discussion this early.
sneumann commented on Feb 9, 2016
Hi everyone, UFZ has a student, Erik Müller, who is already a very productive developer on the RMassBank package. Erik will work on replacing some of the applets, but I guess other applets we will have to decommission, as a full rewrite may not be feasible.
meowcat commented on Feb 10, 2016
wrt molecules, there is ChemDoodle Web Components, which is GPL, pure Javascript and apparently quite good. (I am looking into it for another project.) Can be used for pure display or for editing.
m-arita commented on Mar 2, 2017
Now all MassBank records are associated with InChIKey and we do not need MOL files anymore, not? Masanori 2017-03-03 1:04 GMT+09:00 sneumann <notifications@github.com>:
uchem-massbank commented on Mar 2, 2017
As far as I am aware not all records have InChIKeys (or has something changed?). They will need a SMILES or InChI (IUPAC) field to render structures “on the fly” though, the InChIKey can only retrieve and would probably be too slow? Longer term it would be better to grab the structures from the record e.g.
tsufz commented on Apr 3, 2017
Firefox does not support Java applets anymore, see https://www.java.com/en/download/help/firefox_java.xml for details and workaround.
schymane commented on Apr 3, 2017
We cannot produce structures from InChIKeys, but rather from the SMILES or InChI fields, both of which are compulsory. If these are “NA” or similar, then the structural information doesn’t exist and thus we can’t plot a structure anyway. The idea of working off SMILES would be that we may also be able to render from generic SMILES …
Is JavaFX a good app?
JavaFX is a much newer client side technology for Java. It has a very nice API and lots of "rich media" features. If you want to make a stylish, modern looking Java client side app it is possibly the best choice. It's still relatively new however, and not as well adopted.
Does Chrome support Applet?
Chrome has stopped supporting it while other browsers by default doesn’t enable it, you have to enable the applet plugin manually. Coming with Java 9, Oracle reportedly deprecating the Applet plugin altogether [ 1] .
Can I use AppletViewer with Java?
So, if you are a learner and learning Java applets from the outdated Java books , you can still use the supported browsers (or AppletViewer, a program bundled with JDK). Better, don’t spend time learning about Applets based programming - its an obsolete technology.
Is Applets used in Java?
Applets are not used now a days as commonly as it was during its initial phases. Earlier, applets were a good way to embed java code into browsers and there were hardly any alternatives available. However, in todays world we have some really good and efficient alternatives available.