What is the use of Random class in java?

Random class is used to create random numbers, but what is the difference b/w ordinary displaying numbers and using Random?

A Random class generates a stream of pseudo-random numbers.

To create a new random number generator, use one of the following methods:

new Random()
new Random(long seed)
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Stop falling in cement, its messing with your garden of carrots.

"Ordinary displaying numbers" isn't displaying random numbers. Your question isn't too clear.

generate a stream of pseudorandom numbers

Java was one of the first , hence it is almost integrated into every system like p.c's cell phones etc...

well dude...1st of all...random is a function and not a class...and it is used to generate random nos(as the name suggests). but it generates the no in terms of decimal from 0.0 to 1.0. So u need to multiply, divide, add, subtract(Wherever reqd.) to bring it to ur desired range. Consult this book for better understanding:- JAVA - A Complete Reference. by Patrick Naughton and Herbert Schildt. It is published by Tata McGraw Hill.