Java - Accessing Enclosing Class Members

  1. HOME
  2. Java
  3. Inner Class
  4. Accessing Enclosing Class Members

Introduction

An inner class has access to all instance members, instance fields, and instance methods of its enclosing class.

Demo

class Outer {
  private int value = 1;

  // Inner class starts here
  public class Inner {
    public void printValue() {
      System.out.println("Inner: Value = " + value);
    }//from w  ww.j  a v a  2s  . co m
  } // Inner class ends here

  // Instance method for the Outer class
  public void printValue() {
    System.out.println("Outer: Value = " + value);
  }

  // Another instance method for the Outer class
  public void setValue(int newValue) {
    this.value = newValue;
  }
}

public class Main {
  public static void main(String[] args) {
    Outer out = new Outer();
    Outer.Inner in = out.new Inner();

    // Print the value
    out.printValue();
    in.printValue();

    // Set a new value
    out.setValue(2);

    // Print the value
    out.printValue();
    in.printValue();
  }
}

Result

Related Topics