Trying to create a 2D array that takes the users input for rows and columns. The numbers inside the array are then randomized from 0 to 100. I am getting the following error:
Enter rows for the array: 3
Enter columns for the array: 2
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Index 3 out of bounds for length 3 at test2.main(test2.java:17)
Here is my code:
import java.lang.Math;
import java.util.Scanner;
public class test2 {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
System.out.print("Enter rows for the array: ");
int rows = scan.nextInt();
System.out.print("Enter columns for the array: ");
int columns = scan.nextInt();
int [][] myArray = new int [rows][columns];
for (rows = 0; rows < myArray.length;rows ) {
for (columns = 0; columns < myArray.length; columns )
myArray[rows][columns] = (int) (Math.random()*100);
System.out.print(myArray[rows][columns] "\t");
}
}
}
CodePudding user response:
You should use separate variables to run the loops.
public class Random {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
System.out.print("Enter rows for the array: ");
int rows = scan.nextInt();
System.out.print("Enter columns for the array: ");
int columns = scan.nextInt();
int[][] myArray = new int[rows][columns];
for (int row = 0; row < rows; row ) {
for (int col = 0; col < columns; col ) {
myArray[row][col] = (int) (Math.random() * 100);
System.out.print(myArray[row][col] "\t");
}
}
}
}