Java applets have been deprecated and removed from modern browsers due to security issues and the rise of alternative technologies like JavaScript, HTML5, and CSS.

Oracle adds that “These annotations will cause deprecation warnings to be emitted by the Java compiler for all code that uses this API. If warnings are treated as errors, they will result in the build ...

However, Java applets can still be run using standalone Java applications or applet viewers, such as the Applet Viewer tool that comes with the JDK. Additionally, some legacy applications may still ...