- Background information:

I have recently started learning the basics of Java programming language. To run my program at the command prompt, I downloaded the java development kit also known as JDK, and I set my windows 10 system path to:

C:\Program Files\Java\jdk-9.0.1\bin;C:\Program Files\Java\jre-9.0.1\bin

- Problem:

After writing a simple Hello World program with the following format:

    class test{

        public static void main(String[] args){

            System.out.println("Hello World!");
        }
    }

and running it on command prompt using

javac test.java

, and then writing

java test

the output says:

Error: Main method is not static in class test, please define the main method as:
public static void main(String[] args)

I have tried compiling my simple program on an online Java compiler and everything works fine.

- Edit:

As suggested using a Java decompiler. I used http://www.javadecompilers.com/result and the output was:

    import java.io.PrintStream;

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

- Question:

Where is the problem coming from? How can I fix it?