Java applets have been deprecated since Java 9 and have limited support in modern web browsers due to security concerns. Most web browsers no longer support applets, and it's recommended to use alternative technologies such as JavaFX, Swing, or web frameworks like React or Angular for web development.
However, if you still need to run a Java applet for a specific purpose, You can view this result:
For this you only need to download chrome extension named as "CheerpJ Applet Runner"
Link:https://chrome.google.com/webstore/detail/cheerpj-applet-runner/bbmolahhldcbngedljfadjlognfaaein
result for play and stop music player: