java compiler error

I am trying to compile a simple program which is as follows:

public class A {

public static void main(String args[])
    {
        B b=new B();
    }

}

Above program is in file A.java

second program is in file B.java which is as follows:

public class B { public B() { System.out.println("hello"); } }

compiling A.java there are two errors of can not find symbol: B(pointing below this B) b=new B();

and

B b=new B(pointing below this B)();

I am using windows 7:

when i include both programs A and B inside same file A.java it compiles fine and run as well.But putting class B in different file named B.java compiler complains about not finding class B as explained above. Please help me to find what is wrong with this simple program.

August 22, 2012 at 9:31 PM

SAME HERE IF YOU GET THIS PROBLEM SOLVED THEN PLEASE REPLY......... MY ONE JAVA FILE IS:

abstract class A {

abstract void callmetoo() { System.out.println("anoop"); } }

ANOTHER FILE IS:

class B extends A { void callme() { System.out.println("an"); } }

AND THIRD ONE IS:

class AbstractDemo { public static void main(String args[]) { B b1=new B();

b1.callmetoo(); } }

WHEN I AM COMPILING javac AbstractDemo.java,I receives en error: AbstractDemo.java:5:cannot find symbol symbol: class B location: AbstractDemo B b1=new B(); ^ B b1=new B(); ^ 2 errors...

PLEASE REPLY SOON