How can one check if an integer is equal to another in a 2D array? I am trying to compare the integer “a” from the 2D array named “int[][]board” with the other variables (b, c, d, e, f, g, h, i) to check if “a” is equal to any of them. I attempted to solve this issue by wri…
Tag: multidimensional-array
What is the quickest way to determine if two elements are in the same row or column in a 2D array?
As part of one of my programs, I’m trying to check if two elements in a 2D array are part of the same row or column. I know there might be many ways to go about this, mainly with loops and by iterating through the array, but I was just wondering: is there any quick way to determine this? Let’s
Java multidimensional arrays – How to refer to the length of different dimensions
We are learning about 2D arrays in my AP computer science A class and I have a question that I’m struggling to find the clear answer to. For some context when I’m talking about my question, ragged arrays are out of the picture and when I refer to rows I am talking about arrays going across and whe…
Sort 2D array by average value of each line
I have complex task to differently sort two dimensional array manually. So far I get done those tasks: User needs to input row size from 10 – 20, Generate 2D array where row size is user input and column size is randomly generated from 10-50, Each array is filled with randomly generated numbers from 100…
Dividing a 1D array into a 2D array
So I have homework that asked me to: Write a method that takes two parameters: an array of integers and an integer that represents a number of elements. It should return a two-dimensional array that results from dividing the passed one-dimensional array into rows that contain the required number of elements. …
Remove a specific row from a 2D Array
Given a 2D array and a string, how can I remove a row which does not contain a specific string? So far, I created a nested for loop which iterates through the array, adding all adjacent elements(except the string itself) to an ArrayList. However, I do not want to include elements from rows that exclude the sp…
Why is my random number generator becoming an unused assignment when using it to input values for 2d array?
I have been making a basic game of battleship and to get the CPU to choose ship locations on a 2d array I am making two random number generators to pick values from 1 to 8 on a separate method. For some reason, the random generators show up as unused and I don’t know why. so far this is what
Array from recursive call being overwritten
We’re making a program to solve an asterisk sudoku via a recursive approach with back tracking. The solveIt method calls the solve method which is the recursive method. grid is declared before to be a 9×9 2D array that contains the puzzle to be filled in. If there is one solution, the program must …
How to swap rows and columns of a 2d array? [duplicate]
This question already has answers here: Multi-dimensional array transposing (12 answers) Closed 1 year ago. I’m trying to write a method for ‘transpose’ a two-dimensional array of integers, in which the rows and columns of the original matrix are exchanged. However, I have no idea how I can …
error: incompatible types: String[] cannot be converted to String
I tried taking input of a 6 by 6 matrix in java using the string split function when the string is input in the following way, and to print the matrix. The output that I get is my code: pls, suggest how I can overcome this error Answer When we call split function of String return the String[]. So c[j]