Java Variables | Variable in Java programming

variables:

syntax:
modifers/keywords(optional) datatype variableNameExamplePractice=constantValue;

Ex:

//integral datatype variables(0)
byte one=127;
short two=128;
int three=900;
long four=797987982l;
//float(0.0)
float five=12.78877f;
double six=12.77868768763;
//charecters (emptyspac )
char seven=’c’;
//boolean (false)
boolean eight=true;
//String non datatype java.lang package class
String nine=”HI”;//null
//variables
int variableName;

Based on position in java programming we have 3 type of variables
1. Local variables
2. Instance variables
3. Static variables

1. Local variables:
  i)Local Varibles we can declare and intilization method or block
  ii) Local Varibles don’t have default Values
  iii) local varibles works within the method or block
  iV)you need intialize value in local varibles
  ——————————————————————————————–
2. Instance Varibles:
  i) the varibles which are declare inside the class or out methods or block that type of varibeles
  we called as instance Varibles
  ii)Instance type varibles have default values
  iii)If youwant use/access instance type of varibles compulorsory you need to create object of 
  your class
//Object creation syntax:
ClassName refName=new ClassName();
refName.varibleName;
class InstanceVariblesExample{
    //integral datatype variables(0)
byte one;
short two;
int three;
long four;
//float(0.0)
float five;
double six;
//charecters (emptyspac )
char seven;
//boolean (false)
boolean eight;
//String non datatype java.lang package class
String nine;//null

public static void main(String args[]){
//integral

InstanceVariblesExample dude=new InstanceVariblesExample();
System.out.println(“Integral Datatype Default Value :: 0”);
System.out.println(“byte Default Value :: “+dude.one);
System.out.println(“Short Default Value :: “+dude.two);
System.out.println(“int Default Value :: “+dude.three);
System.out.println(“long Default Value :: “+dude.four);
System.out.println(“———————————— “);
System.out.println(“Float Datatype Default Value :: 0.0”);
System.out.println(“float Default Value :: “+dude.five);
System.out.println(“double Default Value :: “+dude.six);
System.out.println(“———————————— “);
System.out.println(” Char Default Value :: “+dude.seven);// 
System.out.println(” Boolean Default Value :: “+dude.eight);
System.out.println(” String Default Value :: “+dude.nine);

}

}class InstanceVariblesExample{
    //integral datatype variables(0)
byte one;
short two;
int three;
long four;
//float(0.0)
float five;
double six;
//charecters (emptyspac )
char seven;
//boolean (false)
boolean eight;
//String non datatype java.lang package class
String nine;//null

public static void main(String args[]){
//integral

}

}
class Example{
    int one;//instanc varibels
public static void main(String args[]){
int a;//declaration
System.out.println(a);
Example e=new Example();
sop(e.one);

}
}