Why mobile phones do not support Applets?

Question

You know that Java is a platform-independent,that means it can run on any device and system.Even the supercomputers use Java.So why the applets(small graphical applications) are not supported by the mobile phone.I want to know the real reason behind this.
So please answer.

Answer 1

I'm not explaining the below because @Sami Khan's got it - this is just for people wanting terms to Google.

"Android" runs the Dalvik Virtual Machine (DVM) until Lollipop, when it switches to the Android Runtime (ART)
"Not Android" combines the Java Runtime Engine and Java Virtual Machine (JRE + JVM)

Answer 2

Java Applets are built to run within web browsers. Java Applets will not work within a browser in Android as they do not make a plug-in like the ones you’d find for a desktop computer.