+ 2

why it's printing weired output if i do not specified the column while printing array elements ?

why it's printing symbols? https://code.sololearn.com/c4XqyornzZ41/?ref=app

18th Apr 2021, 2:38 PM
Ratnapal Shende
Ratnapal Shende - avatar
3 ответов
+ 4
The weird output is because an Array's toString() returns memory reference information instead of the values from the array. arr[row] is an array. It is not an int. You almost definitely want: System.out.print(" "+arr[row][col]); Instead of: System.out.print(" "+arr[row]); Here is the adjusted code: public class Main { public static void main(String[] args) { int arr[][]={ {1,2,3,4}, {5,6,7}, {9,10,11,12} }; for(int row=0;row<arr.length;row++) { for(int col=0;col<arr[row].length;col++) { System.out.print(" "+arr[row][col]); } System.out.println(); } } }
18th Apr 2021, 2:54 PM
Josh Greig
Josh Greig - avatar
+ 3
Ratnapal wrote, "toString() is the Method of instance arr ? what is memory reference information?" Response: You're getting something this printed: [I@54bedef2. "[" is for array. Only one bracket because it is a 1-dimensional array that you're printing. arr is a 2 dimensional array but arr[row] is 1-dimensional. "I" is for int. The array you're printing is of int. @54bedef2 is related to memory address. A memory address is something you don't need to deal with directly in Java but you'd deal with them directly in c, c++, assembly and other older languages. The digits range from 0-9 and a-f because it is hexidecimal. It isn't base 10 like you almost always use in math class. You saw that I gave you a fixed version of the code in the previous answer, right?
18th Apr 2021, 4:40 PM
Josh Greig
Josh Greig - avatar
0
toString() is the Method of instance arr ? what is memory reference information? 🤔
18th Apr 2021, 2:58 PM
Ratnapal Shende
Ratnapal Shende - avatar