All Questions
37 questions
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Accessing methods of methods of interfaces directly created in Arraylist
I have created an ArrayList named Accounts and then directly created a object in it using add method. Is there a way in which I can access the methods of the object?
public class Main {
static ...
user14793600
0
votes
3
answers
129
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Object Arraylist fails to store objects [duplicate]
I am new to Java and I am trying to create a library program containing two separate class files. One file contains the Book class while the other contains the Library class.
Book class:
public class ...
0
votes
1
answer
1k
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Method Calls from Child Class objects in arraylist of parent class Java
So I have a parent class with a series of child classes for some objects I need to use in a program.
class parentClass{
}
class childClass1 extends parentClass {
}
class childclass2 extends ...
0
votes
3
answers
76
views
Create a method for inputting objects in an ArrayList
I have a task to create a method which holds the same variables as the already created constructor for my objects whicj i have added 3 of them to the ArrayList.
When the method is called in the main ...
0
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0
answers
33
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Why is this toArray() method not working? [duplicate]
I am making a simple blackjack program in java, in which there is a Dealer class that extends the Player class. The problem in the code below is that when calling the Player.hit() method is called, I ...
0
votes
5
answers
69
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Accessing attributes, methods of different class objects stored inside an object type Arraylist
I have different weapon classes with various attributes and functions (some of which are similar). I am trying to iterate through objects of classes and trying to access those attributes based on ...
0
votes
1
answer
25
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I can't seem to figure out how to print the values I've assigned to my objects [duplicate]
This might be an easy answer but I'm new and my professor hasn't been much help, also feel free to correct my terminology. Essentially I have a class "Employee" and I'm trying to add several instances ...
3
votes
4
answers
12k
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Java - How to find students with their highest marks writing a method in a Student class?
I'm a beginner in java and got stuck in one task. I will be very thankful if anyone could help me. I have a class Student with these attributes - name, chemistry mark, mathematics mark and physics ...
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-1
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1
answer
6k
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CodeHS Billboard Class AP CS A
I am struggling with the CodeHS Java problem Billboard Top 10. I am trying to reference a Musician object within the top10 ArrayList, but I keep getting the error:
non-static variable top10 cannot ...
- 1
-1
votes
1
answer
366
views
How do I create a Dynamic Object with a ArrayList, which can use Methods?
I got a Task for my education, and I need to program a delivery site.
I have classes called "Pizza", PizzaReader2 (because 1 was just a test) and the main class PizzaApplication.
So the PizzaReader ...
- 27
0
votes
1
answer
43
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Transferring one object's ArrayList's contents to another [duplicate]
I'm trying to transfer the contents of an ArrayList from one Book object to the other Book object. The method would be called as
bookA.transfer(bookB);
However, with the code below, I get an error ...
- 45
0
votes
1
answer
38
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Sorting an ArrayList object populated with custom objects with two data fields each
stuck on a problem with sorting ArrayLists. I'm sure the answer is really easy and something I just keep overlooking, but I've been working on this for the past many hours straight and just need ...
- 41
1
vote
3
answers
169
views
String from object does not equal string from the same object in an ArrayList
I'm building a catalogue using an ArrayList to hold an object called boot.
I haverun into a problem with one of the methods in my catalogue class. The method is supposed to run through the catalogue ...
- 13
0
votes
1
answer
77
views
Sorting an ArrayList as objects are being put into them
Im currently working on a class that includes a method "add" that adds my specific object to my ArrayList which is a field instantiated in my constructor. The purpose is to obviously add the object to ...
- 3
0
votes
1
answer
90
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Pass a created object from one class to another and add to ArrayList?
I´ve created a function where you add a result for a participant in a event.
Now I want to pass the created object to an addResult-method in my participant class and thereafter add it to an ArrayList ...
- 109