Run Java as a script. Requires Java > 9

hello.java

///usr/bin/env java $0 $@; exit
public class hello {
  public static void main(String[] args) {
    System.out.println("I'm a script! Or am I? 😉");
  }
}
/* to run it, execute a follows:
$ ./hello.java
*/

Apparently, you don't have to make it executable. This may lead to security issues. 🤔

Updated to simpler header. Inspired by jbang.