Which is the most suitable editor and compiler to code in Java and how can I install my it?

Answer 1

IntelliJ IDEA community edition
https://www.jetbrains.com/idea/download/

Or Visual Studio Code with Java plugin (you need to install JDK separately too)
https://code.visualstudio.com/docs/languages/java

Read the guides for full install instructions. A lot depends on your system, OS etc.

Other popular Java IDE are: Eclipse and NetBeans
https://www.eclipse.org/downloads
https://netbeans.apache.org/
But I am not recommending either of them. I tried Eclipse, it was too complicated and unreliable.

Answer 2

compiler / jvm:
https://www.oracle.com/java/technologies/downloads/