All Questions
833 questions
-2
votes
3
answers
119
views
Add an array of objects as a parameter to a constructor
I am working on a Java quiz application. In this I want the four answer options to be as an array instead of coding it is as Option 1,2,..4. How do I add an array of objects to the constructor?
I am ...
-1
votes
2
answers
49
views
Error while building a program which should output assigned domino tiles for each player in Java
So, I am a total beginner in Java. I need a program that takes a number of players as an input. Then assuming there are 91 domino tiles each with two squares with dots ranging from 0 to 12 in each ...
- 31
1
vote
5
answers
198
views
how to return a list of employee's names with the highest pay rate in java
Assume i have a valid Employee class. I create a PayRoll class with main method.
`
public class PayRoll {
public static void main(String[] args) {
//create 6 Employee objects Employee(...
- 21
-1
votes
1
answer
50
views
How come I'm running into an error after all the enemies are defeated, shouldn't it have ended?
I'm making a program using java, and the particular issue I ran into was in the battle method, where the program runs into an error after all the enemies are defeated. I tried to alter it a couple ...
1
vote
1
answer
42
views
GUI Java Swing . Trying to get a string from one class into a jlable of another class
I'm trying to get an output from a bubble sort algorithm (which I'm currently doing with System.out.print) to be displayed in a JLabel in another class when I'm pressing a JButton.
I'm fairly new to ...
- 11
-1
votes
1
answer
37
views
Create Separate Class to Print Smaller and Bigger of Random Array in Java
I am completely lost. I created a Data class that generates Arrays.
The Data class computes a set a of random numbers. I also made another class printing the sum of those numbers.
My issue is I want ...
-1
votes
2
answers
94
views
Outputting w different classes & Constructors
UPDATE: it was an issue that the file I was gathering text from had lol.
Whenever I try running the output, there are multiple exceptions in everything past the welcome message that prevent any output ...
- 1
0
votes
1
answer
101
views
Code Output Comparison and Correction Request
the task description
class Solution {
/**
* @param n the given positive number
* @return the square matrix of order n according to the given pattern
*/
public static int[][] ...
1
vote
2
answers
60
views
Need help assigning array to new type Employee
My code currently runs. The problem is, I miss understood the assignment and I need to arrays of type Employee (so I need an additional class called Employee).
Currently, I have 3 arrays:
Saves Name ...
0
votes
0
answers
66
views
How to make a method that accepts an array from a user, separated by ";" and adds it to the existing private array in the same class
Academic assignment requirements:
Create a custom method called: appendToPersonArr with these parameters: (Person[] srcArr, int mode), that accepts an array of Person[] objects and appends it to the ...
- 1
1
vote
1
answer
63
views
Arrays and objects
If arrays are objects in Java then why they are not initialized using syntax X x = new X();?
Like if there is a class named Person, and I have to create an object of that class then I will use syntax:...
- 19
0
votes
2
answers
68
views
date verify with Java
I've created a class to receive an object with a date and verify by a method if the date is writen correctly. The problem is that my code doesn't work to verify the characters correctly.
Here I have ...
0
votes
1
answer
48
views
How to remove a team name (String) from an Array read from a data file?
I am trying to make an input dialog that prompts the user to select a second team that plays the first team. The team the user selected before cannot show again and there needs to be an error check if ...
- 1
0
votes
1
answer
378
views
Getting error : Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 [duplicate]
I am trying to take name input from another class (i.e. from "StudentMarks.class"). I am taking all the user inputs from main class (i.e. from "StudentMarks.class"), but the ...
0
votes
2
answers
60
views
What may be the problem for finding frequency of elements in array through class leading to NULL Pointer Exception?
This code finds the frequency of elements in the array. But it is showing cannot read field because array is null.
Code
import java.util.*;
public class Main {
public static void main(String[] ...
- 106