Basic

Java

Hello.java

public class Test {
    public static void main(String[] args) {
        System.out.println("Hello, World!");
    }
}

Compile and run:

javac Hello.java
java -jar Hello.jar                                                                                        

Run directly:

java Hello.java

Kotlin

hello.kt

fun main() {
    println("Hello, World!")
}

Compile and run:

kotlinc hello.kt -include-runtime -d hello.jar
java -jar hello.jar