Object-Oriented Programming

Question

Question.

1. Briefly discuss how to create a simple program in java that contains main method.

2. What are the three types of variables in java?

3. How do you declare variables in a program?

4. What is Expression? Operators?

Answer 1

class LyncyM

{

public static void main(String args[])

{

int iIntvar = 12;

long longIntNum = 54321;

float flAmt = 333.33f;

double flDblAmt = 3.1415925;

String str="HELLO";

// this is a one line commnet

/*****************

this is a multi-line comment

*************************************/

/*******************

operators: add +, subtract -, multiply *, divide /,

mod %, increment by 1 ++, decrement by 1 --

comparison operators: equal ==, not equal !=,

greater >, less <,

greater or equal >=,

less or equal <=

**************************/

// expression contains numbers, variables, operators

System.out.println(iIntvar);

System.out.println(longIntNum);

System.out.println(flAmt);

System.out.println(flDblAmt);

System.out.println(str);

}

}