Can I use methods of a class without instantiating this class?

Question

I have a class with several methods and there is no constructor among these methods.

So, I am wondering if it is possible to call a method of a class without a creat

Answer 1

Since qre is a static method and doesn't have an access to instances of the enclosing class you'll have first to create an instance and then access it. For example:

public class Foo {
   private int bar;

   public static void qre() {
      Foo foo = new Foo();
      foo.bar = 5;
      System.out.println("next bar: " + (++5));
   }
}