ArrayStoreException: if the runtime type of the specified array is not a supertype of the runtime type of every element in this list. The toArray() method of ArrayList is used to return an array containing all the elements in ArrayList in the correct order. How do you cast an ArrayList to an array? – Additional Questions What is toArray method in Java?ĪrrayList toArray() method in Java with Examples Therefore, if you pass 0 to this method you can get the first element of the current ArrayList and, if you pass list. How do you access values in an ArrayList? The get() method of the ArrayList class accepts an integer representing the index value and, returns the element of the current ArrayList object at the specified index. ArrayList names = new ArrayList ( Arrays. asList method and pass the array argument to ArrayList constructor. How do you declare an ArrayList and an array in Java? To create an array list in Java, you declare an ArrayList variable and call the ArrayList constructor to instantiate an ArrayList object and assign it to the variable: ArrayList friends = new ArrayList() You can optionally specific a capacity in the ArrayList constructor: ArrayList friends = new ArrayList(100) Ĭan you initialize ArrayList with array? To initialize an arraylist in single line statement, get all elements in form of array using Arrays. Likewise, we can convert back a List to Array using the Arrays. It will return an array containing all of the elements in this list in the proper order (from first to last element.)Ĭan we convert list to array in Java? The best and easiest way to convert a List into an Array in Java is to use the. How do you cast an ArrayList to an array? To convert ArrayList to array in Java, we can use the toArray(T a) method of the ArrayList class.