Accessing instance variable

I have read from a website that instance variables can be accessed directly within the class but my code below works only with object. can someone please help.Thanks in advance!

public class InstanceVariable
    {
        int instVariable;
        // Instance variable are accessed through objects
        public static void main(String []args)
        {
            /* Local variables has no default value but Instance variables 
            can have default value */
    
            int a = 10;
            // Here local variables a cannot have access modifiers
            InstanceVariable obj = new InstanceVariable();
            System.out.println(obj.instVariable);
            System.out.println(a);
        }
    }