Simpliest way to convert array of Integer to array of String in Java 8 [duplicate]

Question

I would like to convert an Integer[] but toArray() is giving me Object[]. How can I convert it to String[]?

Stream.of(ids).map(String::valueOf).toArray();

Not really a duplicate of the other question. This involves array of Integer[], which is a special case. — Dale Johnson
– Dale Johnson, Commented Jul 19, 2016 at 1:39

Reimeus · Accepted Answer · 2016-07-04 21:44:35Z

9

String[] array = Stream.of(ids).map(String::valueOf).toArray(String[]::new);

answered Jul 4, 2016 at 21:44

Reimeus

160k16 gold badges225 silver badges282 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

richersoon Over a year ago

I am surprise, Is this a method reference? New keyword can be treat as method?

Vince Over a year ago

@richersoon It's a reference to the constructor

Reimeus Over a year ago

method references can be used for constructors as well as methods

Holger Over a year ago

When you have an existing array, it’s recommended to use Arrays.stream instead. This will consistently work for int[], long[] and double[] as well (you only have to use mapToObj instead of map then), whereas Stream.of only works for boxed values and it’s intended use case is the varargs invocation like Stream.of(a, b, c)…

Michael · Accepted Answer · 2016-07-04 21:55:24Z

-1

String[] a= Arrays.toString(array).split("[\\[\\]]")[1].split(", ");

I think this should work

edited Jul 4, 2016 at 21:55

answered Jul 4, 2016 at 21:44

Michael

7865 silver badges20 bronze badges

Collectives™ on Stack Overflow

Simpliest way to convert array of Integer to array of String in Java 8 [duplicate]

2 Answers 2

4 Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

4 Comments

Comments

Linked

Related