Print out an array

Question

How can i print out the whole array? if i do
int [] arr = {2, 3, 4};
System.out.println(arr);

it outputs strange characters. i suppose i can do it with for loop, but than i get the numbers one by one, not the whole array.

Answer 1

https://code.sololearn.com/cFZw4c01m60d/?ref=app

Arrays.toString(arr) for one-dimensional array and Arrays.deepToString(arr) for multi-dimensional.

Answer 2

Your are right about the loop. In Java, arrays have a length property which you can use in a for loop to walk trough the array, one by one.

If you don't care about the (loss of) the data type and just want the array at a whole printed to the screen, you can import Arrays (import java.util.Arrays) and use the toString method, see https://code.sololearn.com/c3yWe9DKbJr1

(I haven't set the code example to "Public" and I'm not certain whether it can be linked anyway. If this doesn't work, please just drop me a line.)

Answer 3

for(int a=0;a<arr.length;a++){
System.out.println(arr[a]);
}

this is it.

Answer 4

thanks for help to everybody, i got it, links worked fine!