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How to call a method from another class file in java?

If you want to acess it from another class file then you have to instantiate an Object and then access it using the public method: Main m = new Main(); int a = m. getVariableName();

How do you call a method from another class in Java?

  1. import java.lang.reflect.*;
  2. class M{
  3. public static void main(String args[])throws Exception{
  4. Class c=A. class;
  5. Object obj=c.newInstance();
  6. Method m=c.getDeclaredMethod(“cube”,new Class[]{int. class});
  7. m.setAccessible(true);
  8. m.invoke(obj,4);

How do you call an activity method from another class?

public class MainActivity extends AppCompatActivity { // Instance of AnotherClass for future use private AnotherClass anotherClass; @Override protected void onCreate(Bundle savedInstanceState) { // Create new instance of AnotherClass and // pass instance of MainActivity by “this” anotherClass = new AnotherClass(this); …

Can we override private method in Java?

1) In Java, inner Class is allowed to access private data members of outer class. … 2) In Java, methods declared as private can never be overridden, they are in-fact bounded during compile time.

What is private method in Java?

In Java private methods are the methods having private access modifier and are restricted to be access in the defining class only and are not visible in their child class due to which are not eligible for overridden. However, we can define a method with the same name in the child class and could access in parent class.

How do I call a method in Kotlin?

Before you can use (call) a function, you need to define it. To define a function in Kotlin, fun keyword is used. Then comes the name of the function (identifier). Here, the name of the function is callMe .

What is getActivity?

getActivity() in a Fragment returns the Activity the Fragment is currently associated with. (see http://developer.android.com/reference/android/app/Fragment.html#getActivity()). getActivity() is user-defined.

How do you end an activity from another activity?

  1. Make your activity A in manifest file: launchMode = “singleInstance”
  2. When the user clicks new, do FirstActivity. fa. finish(); and call the new Intent.
  3. When the user clicks modify, call the new Intent or simply finish activity B.

Can we override main method?

No, we cannot override main method of java because a static method cannot be overridden. … So, whenever we try to execute the derived class static method, it will automatically execute the base class static method. Therefore, it is not possible to override the main method in java.

Can we override final method?

Can We Override a Final Method? No, the Methods that are declared as final cannot be Overridden or hidden.

Can constructor be private?

Yes. Class can have private constructor. Even abstract class can have private constructor. By making constructor private, we prevent the class from being instantiated as well as subclassing of that class.

What is the difference between private method and final method?

private is about accessibility like public or protected or no modifier. final is about modification during inheritance. private methods are not just accessible from the outside of the class. final methods can not be overridden by the child class.

Can we declare method as private?

Yes, we can declare the main method as private in Java. It compiles successfully without any errors but at the runtime, it says that the main method is not public.

Can we override static method?

Static methods cannot be overridden because they are not dispatched on the object instance at runtime. The compiler decides which method gets called. Static methods can be overloaded (meaning that you can have the same method name for several methods as long as they have different parameter types).

What is method in Kotlin?

Method is a function associated to an object. … A member of a Kotlin class is either a method or a property. This is why properties defined in the class are called a member property in contrast to top-level properties that are not associated to any class.

What does :: mean in Kotlin?

:: is used for Reflection in kotlin. Class Reference val myClass = MyClass::class. Function Reference this::isEmpty.