Printing all elements of an array in one println statement in Java [duplicate]

Question

public class Test {

    public static void main(String[] args) {

        int[] a= new int[]{1,2,3};

        System.out.println(a);


    }
}

I expected to take a compile or run-time error.I took an output.It's "[I@1ba4806".What's the reason of it in Java?

Answer 1

That's the default implementation of toString() in Object you're seeing. You can use Arrays.toString for a readable result (make sure to import java.util.Arrays):

System.out.println(Arrays.toString(a));