Types of Variables in Java

Types of Variables in Java

1. Local Variables:

• Declared inside a method, constructor or block.
• Accessible only within the scope of where they are declared.
• Must be initialized before use.

Example : 

public void display() {

     int localVariable = 10; // Local variable

    System.out.println(localVariable);

}

2. Instance Variables:

• Declared inside a class but outside any method, constructor or block.
• Each object of the class gets its own copy.
• Initialized to default values if not explicitly initialized.

Example : 

public class Example {

  int instanceVariable; // Instance variable

    public static void main(String[] args) {

       Example obj = new Example();

       System.out.println(obj.instanceVariable); // Default value is 0

    }

}

3. Static Variables:

• Declared using the static keyword.
• Shared among all instances of the class.
• Used to define constants or shared properties.

Example : 

public class Example {

static int staticVariable = 5; // Static variable

public static void main(String[] args) {

     System.out.println(Example.staticVariable);

    }

}