what is runtime library

Answer 1

A set of programs that your java program use. So it needs when your program is run.

E.g. program dealing with system I/O, to print a string to console, we don't need to implement it. We just call System.out.println("a").

Answer 2

a runtime library is like a predefined program in java which are invoked or called using objects or certain keywords..

for ex: to get input value from the user at run time, you can create an object for Scanner and using the object you can give the input value at run time... Let's assume that scanner is a predefined class which have the behaviour to get value from the user at run time which is a predefined class in Java runtime library..

Answer 3

thanks