Composition or Inheritance for classes with almost similar implementations but different input and outputs for methods?

I have the following classes, which have quite similar method implementations. Only the classes’ method inputs and outputs seem to be of different types. When I put it like this, it sounds like a case …

How do I define a field in a subclass by strictly following a given UML?

I’m trying to implement the UML diagram below using java: I only got recently exposed to UMLs and according to my understanding, I cannot set a field inside SBank or PBank to define their rate of …

Lombok with SuperBuilder

I have a Java project that uses Lombok ( a java library that automatically plugs into the editor and build tools ) @Getter @SuperBuilder @NoArgsConstructor @AllArgsConstructor @EqualsAndHashCode(of = {…

super.a = b instead of super(b)

I’m learning the super keyword and accidentally get this, here’s an example : public class A { double a; public A (double a) { this.a = a; } } public class B …

How to increment numbers using Event Listeners and Widget Viewer in Java?

I’m writing a WidgetViewer GUI where when the “go up/up” button is pushed, a random number between 1 and 10 (inclusive) is generated and added to the left label, and another random number …

Accessing objects in other class Java inheritance

In my program I have class Vehicle and class Car which inherit from Vehicle. I’ve created two Car’s objects c and c2. Now I have to make sumFuel() method in Calculate class which sums fuel used by …

Java: Calling a super method which calls an overridden method

public class SuperClass { public void method1() { System.out.println(“superclass method1”); this.method2(); } public void method2() { System.out.println(“…

Calling super super class method

Let’s say I have three classes A, B and C. B extends A C extends B All have a public void foo() method defined. Now from C’s foo() method I want to invoke A’s foo() method (NOT its parent B’s …