Java ArrayList Index

int[] alist = new int [3]; alist.add("apple"); alist.add("banana"); alist.add("orange"); 

Say that I want to use the second item in the ArrayList. What is the coding in order to get the following output?

output:

banana

7 Answers

You have ArrayList all wrong,

• You can't have an integer array and assign a string value.
• You cannot do a add() method in an array

Rather do this:

List<String> alist = new ArrayList<String>(); alist.add("apple"); alist.add("banana"); alist.add("orange"); String value = alist.get(1); //returns the 2nd item from list, in this case "banana" 

Indexing is counted from 0 to N-1 where N is size() of list.

Read more about Array and ArrayList

List<String> aList = new ArrayList<String>(); aList.add("apple"); aList.add("banana"); aList.add("orange"); String result = alist.get(1); //this will retrieve banana 

Note: Index starts from 0 i.e. Zero

• Resource

Using an Array:

String[] fruits = new String[3]; // make a 3 element array fruits[0]="apple"; fruits[1]="banana"; fruits[2]="orange"; System.out.println(fruits[1]); // output the second element 

Using a List

ArrayList<String> fruits = new ArrayList<String>(); fruits.add("apple"); fruits.add("banana"); fruits.add("orange"); System.out.println(fruits.get(1)); 

Exactly as arrays in all C-like languages. The indexes start from 0. So, apple is 0, banana is 1, orange is 2 etc.

In order to store Strings in an dynamic array (add-method) you can't define it as an array of integers ( int[3] ). You should declare it like this:

ArrayList<String> alist = new ArrayList<String>(); alist.add("apple"); alist.add("banana"); alist.add("orange"); System.out.println( alist.get(1) ); 

The big difference between primitive arrays & object-based collections (e.g., ArrayList) is that the latter can grow (or shrink) dynamically. Primitive arrays are fixed in size: Once you create them, their size doesn't change (though the contents can).

Here is how I would write it.

String[] fruit = "apple banana orange".split(" "); System.out.println(fruit[1]);