All Questions
21
questions
0
votes
2
answers
110
views
Java: Print elements of User defined Classes using ArrayList [duplicate]
When I try to run the code I don't get 101,102,103 as output rather I get memory addresses of each value, I want to print the values 101,102,103 using "user defined class" pt_5_Employee as ...
user19991468
1
vote
1
answer
3k
views
Implementing a printAnimals method
I am trying to implement a printAnimals() method that prints the ArrayList for dogs or prints the ArrayList for monkeys, or prints all animals whose training status is "in service" and whose ...
- 71
0
votes
1
answer
2k
views
C# accessing element of object from List<> using for loop instead of foreach
trying to brush up my foundation on C#. How do I print the value of objects from a List? I have a List and wants to print out the Name and Age to console.
I can use foreach loop to print them out ...
- 47
1
vote
2
answers
277
views
Retrieve value from int array inside objects ArrayList
i am experementing on ArrayList which contains different data types and an int array and I want to access a value from the array for example number 55. Can I directly access this array without using ...
- 33
0
votes
4
answers
4k
views
How to search for an Object in ArrayList?
I want search for an object in an arraylist using one of it attribute: String name.
I have printed out Item Found here, and this works just fine.
public static void searchItems() {
// variable ...
- 99
0
votes
1
answer
57
views
Adding multiple objects to ArrayList using loop, all objects get updated when one is changed
I have been using a for loop to create and add new Graph objects to an ArrayList for use elsewhere in my code, but when I print the list all of the Graph objects inside are identical.
An edit to one ...
- 3
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
0
votes
1
answer
48
views
Values assigned to a Java List inside a for loop are replaced by same object(object at index 0) after the for loop ends [duplicate]
I am creating an Object inside a for loop and adding it to a list as illustrated in the code below. The values are distinct and different when logged inside the for loop how ever once the loop ends, ...
- 37
-5
votes
1
answer
57
views
Cannot identify Error reasoning - Related to ArrayList and FOR loops, how could I fix my code? [duplicate]
I am creating a very simple simple Bank Manager Class which handles a number of Bank Account objects - each object is created with a unique accountNumber, accName, etc., This is how a bank account is ...
- 59
-5
votes
3
answers
473
views
How do I create ArrayList of Objects (string car model, int count, string percentage) in a loop?
So I need to create Object for example called Car containing
- String car model
- int count
- String percentage
After getting this data how do I put all Car Objects into for-loop of Objects to get ...
-1
votes
1
answer
43
views
2-dimensional array not working
I have a 2 dimensional array gets a specific animal from a text file, but for some reason it's not working at all. I have checked for any errors but I get no errors just no output. It just keeps ...
- 1
1
vote
1
answer
109
views
Why does my array contain the same elements?
Java beginner here. I'm trying to add Result objects from an ArrayList to an Array (to be sorted later). I know ArrayLists probably would work better but I'm required to use at least one array in this ...
- 113
0
votes
2
answers
224
views
How would I find the max value of objects in ArrayList in for-loop? -Java [closed]
So it seems that both my methods in my Persons class are giving me the wrong information. I have two methods called get totalSalary() and maxSalary() that go through ArrayList personList and calculate ...
- 15
0
votes
4
answers
133
views
Scanning through ArrayList for Objects with same field
I have a simple class Creator:
public class Creator {
private String name;
public Creator(String name) {
this.name = name;
}
public String getName() {
return name;
...
user3371750
-1
votes
3
answers
2k
views
Java: NullPointerException on a Null Check? [duplicate]
I have read through some of the NullPointerException threads on here, and have formatted my code to use one of the simple checks I found, but I'm still getting a NullPointerException.
Full Code: note ...
- 1,376