Calling a non-static method in a static method

As we all know, statically static methods cannot call the non-static Non-static method, which is exactly the way that the Non-static method cannot be called directly. However, you can call the object's Non-static method by passing a reference to the object into the static method.

In fact, the application of this fact is so often that we do not pay attention to it: in the main function (static method) We often create an instance of a class, and then use its drinking variable to invoke its non-static method. Staticmethodtest.java
A ststic method cannot call a non-static method, but we can transfer a object reference, which include a non-static meth O to the static method, thus, wo can call the Non-static method in a indirect-in-a-do.
public class staticmethodtest{
void Nonstaticmethod () {
System.out.println ("This is a Non-sataic method."); }

static void Staticmethod (Staticmethodtest s) {
System.out.println ("This is a static method.");
S.nonstaticmethod ();
} public static void Main (string[] args) {staticmethodtest sobj=new staticmethodtest ();
Staticmethod (Sobj); Static methods can be called directly in the main function
}
}

Calling a non-static method in a static method