What is the extension of java compiled classes ?

Which method will a web browser call on a new applet

  The number is an abstract class containing subclasses Double, Float,  Short, Integer and Long. 

Which is the method which is executed first before the execution of any other things takes place in a program?

What will be the output of the following Java program? (Note: inputoutput.java is stored on the disk.)

what should be the output of this code block ?

 public class abekus {

  public static void main(String args[]) {

   String str = "abekus";

   System.out.println(str.indexOf('z'));

  }

 }

Which of the following statements about Java is correct?

class M 

{

public static void main(String args[]) 

{ 

double a = 15.64;

int b = 15;

a = a % 10;

b = b % 10;

System.out.println(a + " " + b);

} 

}

What is the output of this program?

class A

    {

        public static void main(String args[]) 

        {        

             int a= 5;

             int b = ~a;

             int c;

             c = a > b ? a : b;

             System.out.print(c);

        } 

    }

What will be the output of the following Java code?

class exception_handling { public static void main(String args[]) { try { throw new NullPointerException("Hello"); } catch(ArithmeticException e) { System.out.print("B"); } } }