All Questions
47
questions
0
votes
1
answer
18
views
Trying to Compute the differences in two different ArrayLists of Objects with Instance Fields of Type Integer[JAVA]
package pckg;
import java.util.ArrayList;
import java.util.HashMap;
public class Tester
{
public static void main(String[] args)
{
ArrayList<TesterObj> my_first_objects = new ...
- 35
-1
votes
2
answers
156
views
How to remove object from an arraylist
its gonna seem complicated but I want to make a function that removes an object from the ArrayList of an object that is in another ArrayList
let me simplify it, there is a class with objects (students)...
0
votes
1
answer
1k
views
I want to get my toString method to print all the information of the objects in my array list but I am getting the output with [] brackets [duplicate]
For my code, I have tried using a toString method which I am not sure if is the best way to display information for objects in an array list. I wanted to try a normal method and then just call it but ...
-2
votes
1
answer
80
views
Sorting an ArrayList of objects using attributes of these objects (using streams) [duplicate]
I'm trying to sort an Array of song objects using a stream, the problem is I am trying to sort the list of objects using an attribute of the objects -title- which is then changing the data type of the ...
- 31
-2
votes
2
answers
50
views
Comparing two ArrayList's [duplicate]
I'm working on a school assignement where i have to check if certain objects from the ArrayList teKoop are not in the ArrayList mijnGames, the problem is i keep geeting this error code:
Index 1 out of ...
- 13
0
votes
0
answers
220
views
How to create and print objects(with several attributes) from arraylist in java?
public class Hurricane
{
private String name, month;
private int year;
private int cat;
private int pressure;
private double windspeed;
//constructor - all private ...
0
votes
1
answer
123
views
the contents of arraylist are printed using println. I want a similar functionality for my created objects without using toString() function in java
In the image above, the contents of the arraylist is printed using println. I want a similar functionality for my created objects without using toString() function in java
please tell me how can i do ...
0
votes
1
answer
96
views
How do I return an object Array of Arraylists
This is the instance method from the UML diagram:
public BankAccount[] getAllAccounts()
The purpose of this method is to return all of the summary details of the customer's Bank Account.
BankAccount ...
- 1
0
votes
1
answer
219
views
Why I am losing the content of my ArrayList when I switch from class to class?
I am currently having a problem and at the same time struggling about ArrayList. I am stuck when I use the ArrayList. I am working on a 3-layer program, which includes the Client, Directory and the ...
-1
votes
2
answers
2k
views
Java Method add ArrayList is undefined for the type <OBJECT>
I am building a java program for my homework where I must add product to particular store. I have trouble when trying to add to ArrayList from Store class.
I have class product as follows:
class ...
- 335
0
votes
1
answer
222
views
I cant access the arraylist attribute of my object in java
So I have three classes, Employee, Event, and Main. The purpose of my program is to create a event management system where the user enters the name of the event along with the names and ID's of ...
- 145
-1
votes
1
answer
340
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
34
views
How to get the value of a Propertie of a stored object in a ArrayList [duplicate]
I have a ArrayList with objects. When I try to get the properties of the objects in the ArrayList, the returned variable isnt exactly the value, which i before set to the variable. For example, when I ...
-2
votes
1
answer
91
views
Does expanding arraylist of objects make a new object?
Assume we have an array list of type Employe , does expanding it's length by 1 make a new object in the list ?
is the code in else statement correct? and is it recommended?
public void ...
- 39
1
vote
1
answer
1k
views
Adding a new object to an ArrayList that is an attribute of another class
I am getting an error when trying to add a new object to an ArrayList that is an attribute of another class. Let me explain.
UML
I do have 2 classes in my model:
Equipo
Jugador
To simplify things ...
- 447