How can I make two instances of a class, update the same array from that class? Like here, I want r1 and r2 to update same pendingOrders, so that finally the array is [‘yo’, ‘lo’]. That is not happening, the r1 and r2 are making different arrays. Answer Add the static keyword to the pe…
Tag: class
How do you have a class change the value of an attribute of another class?
Let’s say I have a class named Door with an attribute that states whether it’s open or closed. Then, there is another class named Person, that is assigned to that door. How would you tell the person to open/close the door by changing the value of the attribute in the Door class with a method in th…
Method to output object details taken from main class
i have a created a main Pet class which contains the pet name and age and 2 sub classes for a Cat and dog which contain the breed, i am trying to create a method to display the information as a string but i am not sure how to pass the arguments to the method. When trying to use the
Creating an object based on the interface
I have class Button in package “pl.components” and I created interface IButoon in package “pl.icomponents”. I would like to create a button based on this interface. This button only has methods that are in the interface. So, I guess when I do Then my ibutton will only be able to use se…
How to convert a class A to class B?
I am working on a method where I’ve written the following line here: As you can see from the TrackingCategoryTransformationClient class below, this yields an error as the abstract method getErpListDataById returns Optional<AccountingObject> and not Optional<TrackingCategory> which is what th…
Using attributes of one class in another class
I am trying to move the assertThat method from Authentication class to the BDDStyledMethod class but the current code will generate the following error “‘Creds(java.lang.String)’ in ‘steps.Authentication’ cannot be applied to ‘()’” How do i correct my code so that the…
Doubly Linked List adding null
I’m new to Java. I want to make student information system, but whenever I used the addStudent method, I get a list with null values. This is the student class for getting names telephone numbers and student ID. This is the Node class. Methods can be wrong maybe they are too complicated sorry for that. …
java.util.concurrent.TimeoutException Error
I am trying to create a function that will receive a stream of strings and it will return a sorted list of strings that meet all of the following criteria: They must contain the pattern The strings length must be equal to or greater than the min length number The strings length must be an even or odd number A…
Trouble calling methods from a class/ [closed]
Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers. This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers. Closed 11 …
How to call ActionPerformed method from different class
I’m trying to call an actionperformed method from a file under the same package as the one I wish to call it from. I have two classes, EditSeriesPaint and MyDataVisualization. I want to call EditSeriesPaint from MyDataVisualization. This is what I’ve tried: EditSeriesPaint Class: MyDataVisualizati…