Process

Standard output variable 'out' is defined in System class. out is usually used in print statement i:e System.out.print()

currentTimeMillis()

System class holds a collection of static methods and variables. The standard input, output and error output of java run time are stored in the in, out and err variables of System class.

lang

Integer

isinfinite() method returns true is the value being tested is infinitely large or small in magnitude.

Number is an abstract class containing subclasses Double, Float, Byte, Short, Integer and Long.

int hashCode()