Java int array to arraylist

Use Arrays#asList(T a) to create a fixed-size list backed by the specified . Basically we are converting an String Array to ArrayList of String type.

Sometimes it is needed to convert a Java array to List or Collection. This Java tutorial adds arrays to ArrayLists with the Collections. It shows common errors in appending arrays.

First, let's take a look at the Java Doc for the constructor method of ArrayList. How to Convert between an Array and a List using plain Java, Guava or Apache. The question is how to convert the following array to an ArrayList? This java Arraylist tutorial shares a nice tip on how to convert array to arraylist. String array or ArrayList of Integer into an Integer Array.

Primitives : ArrayList can not contains primitive data types (like int , float , double) it can only contains Object while Array can contain both primitive data types as . I am missing something simple and fundamental. Remember that ArrayLists only support objects, not fundamental datatypes. Increases the capacity of this ArrayList instance, if necessary, to ensure that it can hold at least the number of . This means that, unfortunately, you can not have an ArrayList of int or an .