I’m trying to implement classes from the same interface but with a different number of parameters in method like the code below. Is there a way in Java to define methods in the interface without constraining the number of parameters? Answer You could use the ellipsis syntax (…) and then check the …
Tag: oop
Java OOP; creating array of objects
I’d like to create an array of objects where 3 objects are from one class, and a 4th is from second class. In the first class I did the following: in the second class I did the following: In the main class, I created several pupil objects and one tutor object, like this: Using objects for printing in ma…
how to replace the vowels from a String with other vowels for encryption?
I’m doing an encryption app with 4 different methods of encryption, one of them is a vowel replace, the problem is that is not working and I’m not sure why, this is the vowelReplace class: } this is my interface: public interface StringEncrypter { } and the controller where I handle the input and …
java.lang.ClassCastException exception using ObjectInputStream, when sending a class as an object
https://github.com/IshayKom/RCProject Classes As Shown in the eclipse package manager (I don’t really deal with github so I don’t know how to upload classes correctly) I got an error running my project. I use VMWare to work on my project but I don’t think that this specific error requires th…
How to create objects for parameterized constructors in Java, when we have two classes with the same attributes?
I have class Student, that has first name, last name and age, and a method to print the name and the age of the student. And I have a second class Professor, that has first name, last name, and university. And I have a method to print the info about the professor. And in the main class I create two
The method compareTo(Comparable) is undefined for the type Comparable
So i am building a library as project that covers not all but most of the data structures and i found myself with this problem: At rows 40 and 41 (rows 3 and 4 of method containsKeyAux) it says “The method compareTo(Comparable) is undefined for the type Comparable” and this blows my mind cause the…
How Can I print like below using thread synchronization method?
I have used thread Synchronization method to print ASCII code and its value like below example. Ex:- A 65 B 66 C 67 . . . . Z 90 But the output is this. Following are the two threads. Thread 1 Thread 2 Main What can I do for it without changing main method? Answer This can be solved using
Accessible and Modifiable data?
what is the difference between accessible and modifiable data in the variable grade in terms of accessibility from outside the class? This is my code where i’m calling grade method from outside the class: Answer accessible data means you can only access .we can you only view or access the data it can no…
How to pass dependency B to A if B depends upon C but C is created within A?
I have an object A used to replace text sequences in a given Word document. To construct A, the following dependency has to be passed to its constructor: ReplaceBehaviour: an implementation of an abstract Visitor (Design Pattern) used to replace different types of content (e.g., text, images, tables) in the W…
Adding a newly created object into an array in swift
I decided to start a project in java to get a rough outline of how the program was to function before I started to program it in swift(a language I am completely unfamiliar with) whilst trying to convert the code I’ve ran into an issue and cannot even understand how I’ve gone wrong. This is contex…