Answer:
Explanation:
The following code is written in Java and is a method that takes in an ArrayList as a parameter, it then loops through the ArrayList and adds each element to the instance variable called arr as well as a space between each element (this can be removed by deleting the " "). Finally, it prints the final result of the variable arr to the screen.
public static void concatAll(ArrayList<String> myArr) {
String arr = "";
for (int x = 0; x < myArr.size(); x++) {
arr += myArr.get(x) + " ";
}
System.out.println(arr);
}
