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Could someone let me know why my code will not print an int array, instead it prints a string such as [[I@1d256a73
public class ArrayMultiplication {
	public static void main (String args []){
	int [][]a={{1,6,2},{4,18,3},{5,8,4}};
	int [][]b= {{9,12,13},{6,9,7},{32,4,3}};
	int [][]product = multiply (a,b);
	System.out.println (""+product);
	public static int [][] multiply (int [][]a, int[][]b){
		int aRows=a.length;
		int aColumns=a[0].length;
		int bRows=b.length;
		int bColumns=b[0].length;
		if (aRows != aColumns || bRows != bColumns) {
			return null; 
		int[][]resultantProduct = new int [aRows][aColumns];
		for (int i=0; i<aRows; i++) {
			for (int h=0; h<aColumns; h++) {
				resultantProduct [i][h] += a[i][h] * b[i][h];
		return resultantProduct;
Posted 9-Nov-12 19:20pm
Edited 10-Nov-12 7:11am
Richard MacCutchan at 10-Nov-12 12:14pm
If my suggestions solved the question then please mark it as the solution. But leave the original question intact so other people can read it and benefit from the information.

1 solution

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Solution 1

	System.out.println (""+product);
product is the name of a two-dimensional array, but the println() function has no way of knowing how to print its contents, so it treats the address as an integer value and prints that. You need to write a loop to print each individual element of the array in whatever form and format you require.

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