Scanner vs BufferedReader

Some Difference between `Scanner` and `BufferedReader`

Both `BufferedReader` and `Scanner` can read a file or terminal input.

Scanner can read text strings *and* other data types like int, float, long, double, float etc. BUT cannot read individual characters
BufferedReader can read text strings *and* individual characters ONLY THESE TWO

Scanner is new-ish (Java 5 released in 2004)
BufferedReader has been around awhile (JDK 1.1 released in 1997).

(A JDK includes all compiler tools & such in a release and is 'bigger'.)

Scanner can 'buffer' up to 1KB of data.
BufferedReader can buffer 8 times as much, 8KB of data.

What does this mean?
Well, if you are reading really looooooong strings from a file, you must use BufferedReader.
How long?
Well 8K is 8000 bytes. Unicode requires 2 bytes per character so... 4000 character strings.

Scanner uses regular expression to read and parse text input. It can accept custom delimiter.
Because of this possibility, Scanner can be a little bit slower.
BufferedReader can only read and buffer string's using readLine() method.

Scanner is NOT synchronized.
BufferedReader is.

What does this mean?
A BufferedReader can be shared between multiple threads while a Scanner cannot.
Because of this possibility, BufferedReader is a little bit slower in a single thread environment.

Some Difference between Scanner and BufferedReader

Both BufferedReader and Scanner can read a file or terminal input.

Some Difference between `Scanner` and `BufferedReader`

Both `BufferedReader` and `Scanner` can read a file or terminal input.