What is error in it???

Question

mport java.util.Scanner;
public class Main {
public static void main(String[] args) {
System.out.print("Enter the length of array:");
Scanner scan = new Scanner(System.in);
int len = scan.nextInt();
int[] arr={};
for(int i=0;i<=(len-1);i++) {
System.out.print("Enter the numbers one by one:");
int a = scan.nextInt();
arr[i]=a;
}
System.out.print(arr);
}
}

Answer 1

1. You're missing the i at the beginning of import.
2. You aren't initializing the array correctly. Try;
int[] arr = new int[len];
3. System.out.print(arr);
Will output the memory location of the the array. Use;
for (int n : arr) {
System.out.println(n);
}
To output each element of the array instead.
Or if you want to output so it looks like the array.
System.out.println(Arrays.toString(arr));
Note: you'll need the import;
import java.util.Arrays;

Answer 2

in addition to what ChaoticDawg mentioned, if you need a resizable Array, use ArrayList instead of primitive array data type.