what is the difference in using InputStream instead of FileInputStream while creating the FileInputStream object

Question

This may be a silly one, but I want to know the background operation difference.

1. InputStream is = new FileInputStream(filepath);
2. FileIn

Answer 1

FileInputStream extends InputStream: it is a specialized version of an InputStream designed for reading files.

There are several implementations of an InputStream according to the use of it.

It is usually good practice to use the highest type needed in your code. Therefore if your code needs to read data from an InputStream but not specifically from a FileInputStream, you should use InputStream. Yet if you do need to keep the information of your object being a FileInputStream and not just an InputStream, then you should keep the FileInputStream type.