Construct SWITCH in JAVA programming language

I’m learing JAVA programming language.
I’m creating a method GetResult with an argument Integer.
When Java try to compile, there are more errors.

Java switch case statement [closed]

Closed 17 secs ago.

my program is not showing any output and its not giving any error in the terminal. what is wrong with it? my program was to build a calculator in JAVA

to create a simple calculator using a switch case in Java