Method Local Inner Classes In Java

Method-Local Inner Classes In Java

Definition:

A method-local inner class is a class that is defined within a method of the outer class. They are local to the method in which they are defined.

Key Points:

Method-local inner classes can access the outer class's members and the local variables of the method, provided the local variables are declared as final or are effectively final.
They are used when you need to define a class for a short duration within a method.

Use Cases:

Method-local inner classes are often used to perform operations that are limited to a specific method and are not required outside that method.
Useful for encapsulating complex logic within a method while keeping the code more readable and organized.

Code Example

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public class OuterClass {    public void myMethod() {        final int localVar = 100;​        // Method-local inner class        class MethodLocalInnerClass {            public void display() {                System.out.println("Method Local Inner Class: " + localVar);            }        }​        // Creating an instance of the method-local inner class        MethodLocalInnerClass localInnerObject = new MethodLocalInnerClass();        localInnerObject.display();    }​    public static void main(String[] args) {        OuterClass outerObject = new OuterClass();        outerObject.myMethod();    }}

Output

Method Local Inner Class: 100

Method-Local Inner Classes In Java

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