explain System.out.println
Answer Posted / anil kumar
System is a final class in java.lang package
println() is a method define in PrintStream class of
java.io package.
the Printstream class like as
Class PrintStream
{
public void print()
{..........}
public void println(String a)
{...........}
..
..
..
}
and the System class like as
class System
{
public static void PrintStream out;
..
..
out=new PrintStream();
}
this is clear that System is a class and println is a
method but what is out.
out is a reference variable of PrintStream Type that hold
the object of printstream class;
out is a static type so it can be call with its class name
so we can access out with System.out and then we can call
println method on this out object
System.out.println();
now why sunmicrosystem do this
because we haveto not create a new object of Printstream
class for each time when we call println mehod
now we can call println method with the help of precreated
object of printStream class
Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
What is space character in java?
Differentiate between == and equals().
What is a java predicate?
Is assembly language a low level language?
When we should use serialization?
What is the meaning of course?
What data type is string java?
What does jre stand for?
Explain about OOPS concepts and fundamentals.
What are the classes of java?
What is a line separator in java?
What happens if a try-catch-finally statement does not have a catch clause to handle an exception that is thrown within the body of the try statement?
What is functional interface in java example?
Lowest Common ancestor in a Binary Search Tree and Binary Tree.
What isan abstract class and when do you use it?