How do I assign List<Project> to Project[ ] in Java? [duplicate]

Question

I am trying to initialize an array object with a get method which returns an arraylist object. I have tried using .toArray() to convert but it didn't work.

What does "it didn't work" mean? Did you get a compile time error, a runtime error, a wrong result or something else? Be specific. — kjerins
– kjerins, Commented Apr 7, 2019 at 22:51
see: stackoverflow.com/questions/5374311/…. basically the same thing except String and not Project Object — Christian
– Christian, Commented Apr 7, 2019 at 22:57

chiragzq · Accepted Answer · 2019-04-07 22:53:51Z

1

Would Project[] projects = list.toArray(new Project[[0]]) work? The reason it doesn't work normally is because by default toArray returns an Object[], and the JVM is unable to cast that to a Project[]. Passing in the project array allows it to determine the type of the desired array.

answered Apr 7, 2019 at 22:53

chiragzq

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2 Comments

Benjamin Urquhart Over a year ago

you can even do list.toArray(Project[]::new);

Peter Ken Over a year ago

Yes I noticed this question is a repetition but I understood it better when it was answered in my context, given that I'm also a newbie. I stopped getting the compile-time error when I passed an empty array (Project[0]) as an argument for the .toArray() method. i.e. According to my code, Project[ ] projects = list.toArray(new Project[0]); Thank you all.

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