Java - Error: java: incompatible types: java.lang.Object[] cannot be converted to java.lang.String[] - convert ArrayList to String[]

I tried converting an ArrayList to an array of strings (String []) and got this error:

java: incompatible types: java.lang.Object[] cannot be converted to java.lang.String[]

My code: 

import java.util.ArrayList;
import java.util.List;

public class Main {

    public static void main(String[] args) {
        List<String> arrayList = new ArrayList<>();
        arrayList.add("x");
        arrayList.add("y");

        String[] strings = arrayList.toArray();  // this line throw an error 
    }
}