By late 2015, many browser vendors have either removed or announced timelines for the removal of standards based plugin support, eliminating the ability to embed Silverlight, Java, Flash and other standards-based plugin technologies.
Oracle plans to deprecate the Java browser plugin in Java Standard Edition Development Kit 9 (JDK 9). Deprecation is a warning for developers to stop using this technology. JRE 9 will continue to ship the Java Plugin and support launching applets on browsers that still offer standard plugin support. This browser plugin will be removed from the Oracle JDK and JRE in a future Java SE release.
Users of plugin based applications should contact their vendor to ask them what alternative plans will be made available.
Application developers and system administrators need to consider alternative options such as migrating from Java Applets (which rely on a browser plugin) to the plugin-free Java Web Start technology. Early Access releases of JDK 9 are available for download and testing at http://jdk9.java.net. More background and information about different migration options can be found in this short whitepaper from Oracle.
» Moving to a Plugin-free Web (Java Platform Group blog)