You can run Java source code without compiling ! Bye Bye javac !!!

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Java 11 came up with a cool feature to execute source code in single file without compiling it pre-hand

Lets assume Vicky.java file contains following beautiful world changing source code

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

For ages, we do the following

> javac Vicky.java (creates Vicky.class file)
> java Vicky
"Hello World !"

But from Java 11, its further simplified like below

> java Vicky.java
"Hello World !"

So how it works ?

• From Java 11, java command can compile as well as execute the Java source file
• Remember, no .class file will be created while running java Vicky.java

Ok what if there is more than one class defined in same Vicky.java file ?

class Kee {
  public static void main(String[] args) {
      System.out.println("From Kee class");
  }
}
public class Vicky {
 
   public static void main(String[] args) {
      System.out.println("From Vicky class"); 
   }
}
> java Vicky.java
"From Kee class"

• java command executes the main method from the 1st class
• public keyword in class Vicky proved insignificant in this case

Though these are small features, I feel its right step towards simplifying Java…

Thanks for reading..