Calling Non-Static Method In Static Method In Java

The only way to call a non-static method from a static method is to have an instance of the class containing the non-static method. By definition, a non-static method is one that is called ON an instance of some class, whereas a static method belongs to the class itself.

You could create an instance of the class you want to call the method on, e.g.

new Foo().nonStaticMethod();