Java Variables:-
Variables are used for storing the data values.
Various types of variables are:
- String
- int
- float
- char
- Boolean
Declaration of Variables:-
Type variable = value;
Example
String name = “Nitin”;
System.out.println (name);To Top
A parameter used in Java Program:-
- class keyword used to declare a class in java.2
- The public keyword is used to access inside the class outside the class inside the method anywhere.
- static is used when we declare any method as static. There is no need to create an object to call the static method.
- void means that it does not contain any value.
- main represents the starting point of the program.
- String args [] is used for line command.
- System.out.println is used to print the statement.
- Private Java private keyword is an access modifier. It is used to indicate that a method or variable may be accessed only in the class in which it is declared
Example’
class Student { public static void main (String args []) { System.out.println (“I Love you”); } }
Compile by-java Student.java
Run by- Student Java
Output;
I Love You.
Java Methods:-
- A method is a block of code which only runs when it is called.
- You can pass data, known as parameters, into a method.
- Methods are also known as a function.
- If we define the code once and use it many times.
- The method followed by parenthesis ().
- Java provides some pre-defined method such as System.out.println (). But we can also create own method.
Example;
public class Student { static void Mymethod() { System.out.println(“I am fine”); } public static void main(String args[]) { Mymethod(); } }
Output:- I am fine.
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