CODEWITHSUNDEEP
javafilefile-iofilereaderjava-io
Droid_Interceptor
Droid_Interceptor

Reputation: 653

Creating a FileReader which way is better for optimisation?

From an optimization stand point, is it better to declare the File separately like this

File f = new File("sample.txt");
FileReader fr = new FileReader(f);

or, is it better to do it inline like this

FileReader fr = new FileReader(new File("sample.txt));]

Aren't really sure if it even matters really.

Upvotes: 1

Views: 211

Answers (4)

Juvanis
Juvanis

Reputation: 25950

If you are going to reference the just-created instance new File("sample.txt) later in your code, then File f = new File("sample.txt"); would be required. You would be able to access it via the reference variable f.

Upvotes: 2

Roman C
Roman C

Reputation: 1

The difference is obviously the file object couldn't be easily accessed in the code in inline version. And it makes the code less readable, maintainable, and debuggable.

Upvotes: 1

Kumar Vivek Mitra
Kumar Vivek Mitra

Reputation: 33534

- Whether you create a Object Reference Variable of type File to have a reference to the File object or not, it will still be present on the heap.

- Yes its quite valid that having a Object Reference Variable will help you refer back to that File object when you need it the next time....

Upvotes: 1

Jon Skeet
Jon Skeet

Reputation: 1500175

It makes no difference. Do whatever's more readable in your particular situation.

It's possible that it could affect when the File object is eligible for garbage collection, but I'd be hugely surprised to see a situation in which that's a significant difference.

Upvotes: 4

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