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Is it wrong to have static and non-static methods in the same class?
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You can have static methods inside a static class or a non-static class. Also, you can have a static constructor in a static class or a non-static class.
The answer is 'Yes'. We can have two or more static methods with the same name, but differences in input parameters.
Yes, we can declare an overloaded method as static and another one as non-static.
A non-static method is called ON an instance of a class, whereas a static method belongs to the class. Hope this helps. But I am working in Android doesn't onCreate create an instance of the class ? onCreate(){} creates an instance of the Bundle, but not your class.
Not really in regular java programming.
But if you're working extensively with dependency injection you probably have few or no static methods at all. In such a context it's fairly common to have only a few utility classes with static methods, and no other static methods.
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