local variable in java code example

Example 1: what is local variable in java

Local variables are declared in methods,
constructors, or blocks. Local variables 
are created when the method, constructor 
or block is entered and the variable will
be destroyed once it exits the method, 
constructor, or block.

Example 2: instance variable java

A variable declared inside the class is called instance variable. Value of 
instance variable are instance specific.
public class InstanceVariableDemo
{
   // instance variable declared inside the class and outside the method
   int c;
   public void subtract()
   {
      int x = 100;
      int y = 50;
      c = x - y;
      System.out.println("Subtraction: " + c);
   }
   public void multiply()
   {
      int m = 10;
      int n = 5;
      c = m * n;
      System.out.println("Multiplication: " + c);
   }
   public static void main(String[] args)
   {
      InstanceVariableDemo obj = new InstanceVariableDemo();
      obj.subtract();
      obj.multiply();
   }
}

Example 3: java variable declared

java decleartion 

int a, b, c;         // Declares three ints, a, b, and c.
int a = 10, b = 10;  // Example of initialization
byte B = 22;         // initializes a byte type variable B.
double pi = 3.14159; // declares and assigns a value of PI.
char a = 'a';        // the char variable a iis initialized with value 'a'