Java online compiler

Question

Can anyone suggest an online compiler java

Answer 1

- Sololearn of course, useful by web page, but with app suitable for mobiles too with good prg. editor and community support. (Java 10)

- gdb, with debbuger, and editable files for data input.
https://www.onlinegdb.com/

- tutrialsPoint, sometimes reaction of web app is not as you expect. (Java 8)
https://www.tutorialspoint.com/compile_java_online.php

- ideOne (Java 8, 12)
http://ideone.com/
...

Answer 2

https://code.sololearn.com/WNV61ut1vpfX/?ref=app

Answer 3

Name the function used to view the list of packages installed in the system. 

Answer 4

import java.util.Arrays;
...
System.out.println(
Arrays.toString(Package.getPackages()).replace(",",",\n"));