Question

Need help with Arrays in Java. I am getting an error and do not know how to fix it! Will post code below!

Answer 1

public class ArrayPrinter
{
public static void main(String[] args)
{
int [] oneD = {5, 6, 7, 8 };

int[][] twoD = {{2, 4, 6, 8},
{8, 7, 9, 1},
{3, 5, 1, 2}};

int[][] twoD2 = {{1, 2},
{3, 4, 5},
{6},
{7, 8, 9}};

printArray(oneD);

printArray(twoD);
System.out.println("]");
System.out.println(" ");

printArray(twoD2);
}


public static void printArray(int[] arr)
{
System.out.print("[");
int size = arr.length;
for (int i = 0; i < size; i++) {

System.out.print(arr[i]);

if (i < size -1){
System.out.print(", ");
}
}
System.out.println("]");
}

public static void printArray(int[][] arr)
{

System.out.println("[ ");

for (int row = 0; row <= arr.length; row++){

System.out.print("");

for (int i = 0; row <= arr[row].length; i++)
{
printArray(arr[i]);

}
}
}
}

Answer 2

Here is what I get when I run the program:
[5, 6, 7, 8]
[
[2, 4, 6, 8]
[8, 7, 9, 1]
[3, 5, 1, 2]
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 3
at ArrayPrinter.printArray(ArrayPrinter.java:53)
at ArrayPrinter.main(ArrayPrinter.java:19)

I do not know how to fix it and I have been trying figure it out. I do online school and I e-mailed my teacher but she is not getting back to me and this is due today or I will get behind! I am literally pulling my hair out! PLEASE HELP!!!!!!! @SapphireMoon

Answer 3

printArray(int[][] arr) is using a variable "row" in nested for loops. That will cause wierd results (errors). A two dimensional array by nature has rows and columns, x, y coordinates to refer to a single item.

Answer 4

Thank you very much! THat helped me out a lot and the error is fixed after changing my code.

Answer 5

h

Answer 6

@BlazeRyder