What's the difference between subsequence(first, last) and substring (first, last) .

Question

I didn't find any difference when I compiled it

Answer 1

CharSequence is an interface and String is a class.

String, StringBuilder, StringBuffer, CharBuffer and Segment implements this interface.

https://docs.oracle.com/en/java/javase/14/docs/api/java.base/java/lang/CharSequence.html

You can also read here about the difference: https://www.baeldung.com/java-char-sequence-string

Answer 2

subSequence returns CharSequence and substring returns a String.

https://stackoverflow.com/questions/26560440/difference-between-subsequence-and-substring-methods-in-java-string-class

Answer 3

Read the 1st answer on that link.
It is explained pretty well.

Answer 4

Can u make it clear I didn't get it :( Avinesh