Category "arraylist"

How to create a matrix with key and value in java

I have this table with these values I have this code in java import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map;

Looping arraylist object from class value into array java

So I'm trying to insert the value from ArrayList specifically for object Days into one array of integer here is the value I iterate into the table I I've try i

creating a class object array inside another object?

I've got these three classes class Totalizavel def retorna (qnt, valor) total = qnt * valor return total end end class Venda < Tota

How do I separate items in an arraylist by character in Java?

I'm working on a game of Go Fish for a school assignment and I need to separate a group of 4 cards in order to keep score. Any help would be greatly appreciated

Task1:Search for people with their social security number. Task 2: Fetch the list of residents based on their gender

I've created an ArrayList of Residents. Each Residents consists of full name, ssn number and gender. I had to sort the elements by ssn number first and then by

Filtering array list

I have a class which I want to use, to filter my array according to driver. Driver is hardcoded just to try and eliminate possibilities of why the code is not w

How can I avoid ArrayIndexOutOfBoundsException or IndexOutOfBoundsException? [duplicate]

If your question is I am getting a java.lang.ArrayIndexOutOfBoundsException in my code and I do not understand why it is happening, what does

How can I access and iterate through an ArrayList of Linked list element?

I am trying to write a code of adjacency list implementation of the graph ADT. private ArrayList<LinkedList<Integer>> adjLists ; but I don't know

Why Android Studio profiler heap dump showing about 7x overhead for an arraylist?

I was wondering and testing object's memory allocation on Android/Java and found something strange happening on heap, well maybe it's just normal. Here is what

Best way to sort BOTH prefix and suffix with custom sorting

So I have a list of codes, something like: (I.-) (I.+) (I.0) (B.+) (B.0) (B.-) ... (No value) (N/A) I was able to sort them but we have a "custom requirement" t

trouble printing a range of numbers in an array list with own inputs and indices - 3.8 MOOC JAVA

I have an exercise problem from MOOC.fi that I am stuck on! We are learning about arrays and lists in Java, and here is the text for the problem: "The exercise

How to read a file from internal storage or external storage and store the file in a arrayList in android

My requirement is the end-user must be able to upload files into the application from internal or external storage and finally display the name of the file in t

searching in arraylist always not found

no matter what I use indexof() or contains or .equals() changing everything to uppercase or to lowercase It always return false and not found can someone please

Binary Gap Program in Java

My problem statement: A binary gap within a positive integer N is any maximal sequence of consecutive zeros that is surrounded by ones at both ends in the b

Resultset To List null [duplicate]

public List<Order> getAllOrdersByCustomerId(int customerId) throws SQLException { List<Order> AllOrdersByCustomerId = new Arra

Odd number Sequence Replaced by Count

I am working on java Program here is program Question: Consider Java Program. It reads integers from the standard input (until it gets a negative number) and

convert List of List to list float

I have a list of list of coordinate with data type of float for example something like this [[106.4372634887695, -6.3303128514375], [106.4372634887695, -6.32997

how to Save Inputted Values ​from Edittext into Array?

I am making a program to get Values ​​from edittext and store it in an array then I want to display that array on screen and here is my command Edi

Unity C# error: (12,47): error CS1503: Argument 2: cannot convert from 'System.Collections.Generic.List<UnityEngine.GameObject>' to 'float'

I'm new to programming in general. With another Script i store in the list "spawnPointC" all gameobjects called spawnPointC that appear from spawning other pref

java.util.Arrays.asList when used with removeIf throws UnsupportedOperationException

I am preparing for an OCPJP 8 exam for the next 2 months and currently I this one got my attention as I dont understand why public class BiPredicateTest { p