Java Variable Types - Types of Variables in Java
Java Variable Types - Types of Variables in Java
- There are three types of variables in Java
- Local Variable
- Instance variable
- Static Variable
Local Variable
- A variable which is declared inside the body of the method is called Local Variable.
- This variable can be used only inside the function where it is declared.
- This type of variable should not be declared with a static keyword.
Instance Variable
- A variable which is declared inside the class and outside a body of method is called as instance variable.
- This type of variable cannot be declared as static.
- It is called an instance variable because its value is instance-specific and is not shared among instances.
Static Variable
- A variable that is declared with a static keyword is called as static variable.
- Static variables cannot be declared as local variables.
- You can create a single copy of the static variable and share it among all the instances of the class.
- Memory allocation for static variables happens only once when the class is loaded in the memory.
Examples for Variables in Java
public class kaashiv {
static int m=100;//static variable
void method()
{
int n=90;//local variable
}
public static void main(String[] args) {
int data=50;//Instance variable
}}