override static method functionality

Question

We have class library as

class A {
    public void callWorkflow()  {
      B b = new B();
    }
}

class B {
    public void callStatic() {
      C.someMethod();
    }
}

class C {
    public static someMethod() {}
}

We are actually trying to change functionality of static method someMethod. Is there a way to solve this problem without changing call hierarchy?

You might find your answer in [Why doesn't Java allow overriding of static methods?](http://stackoverflow.com/q/2223386/1072229) — Grisha Levit, Jan 24 '17 at 07:08

score 3 · Answer 1 · answered Jan 24 '17 at 06:59

3

You can't just Override a static method. In my opinion, remove static from the method someMethod(), then create an object of class C inside class B. Then call the method.

Class A{
    public void callWorkflow()  {
      B b = new B();}
}
Class B{
    public void callStatic(){
      C c = new C();
      c.someMethod();}
}
Class C{
    public someMethod(){}
}

answered Jan 24 '17 at 06:59

ThisaruG

3,222
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The Class C is in an external library, so its not possible to change implementation there. – venkat g Jan 24 '17 at 08:32

Jiri Tousek · Answer 2 · 2017-01-24T07:06:27.173

1

There is no way to override a static method.

That's why one of these approaches is preferred to calling static methods:

Inject another object (service) that will provide the functionality in a non-static method and call it through the injected object
Make the static method a thin wrapper that just delegates the work to some non-static object that can be configured (like in slf4j's logger)

edited Jan 24 '17 at 07:06

answered Jan 24 '17 at 06:56

Jiri Tousek

12,211
5
29
43

override static method functionality

2 Answers2