Please help

The assignment is the following

Write a method called doubleList that takes an ArrayList of strings as a parameter and replaces every string with two of that same string. For example, if the list stores the values ["how", "are", "you?"] before the method is called, it should store the values ["how", "how", "are", "are", "you?", "you?"] after the method finishes executing. Print content of ArrayList before and after the method call.

What I have so far:

import java.util.ArrayList;

public class DoubleList { ArrayListarrList=new ArrayList(); arrList.add("how"); arrList.add("are"); arrList.add("you"); void DoubleList(arrList) { System.out.println(arrList); }

ScreenShot:

Q 61-1-* * DoubleList.java X 1 import java.util.ArrayList; E Be Outline x 619 DoubleList arrList : ArrayList DoubleList(): void 3 public class Doublelist { ArrayListarrlist=new ArrayList(); 5 arrList.add("how"); 6 arrList.add("are"); 7 arrList.add("you"); X 90 void Doublelist(arrlist) { 10 System.out.println(arrList); 11 } 12 13