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Byron is a master software engineer working in the IT and Telecom domains. He is an applications developer in a wide variety of applications/services. He is currently acting as the team leader and technical architect for a proprietary service creation and integration platform for both the IT and Telecom industries in addition to a in-house big data real-time analytics solution. He is always fascinated by SOA, middleware services and mobile development. Byron is co-founder and Executive Editor at Java Code Geeks.

Creating inner class example

This is an example of how to create an inner class. In short, to create an inner class we have performed the following steps:

  • We have created a class CreatingInner that contains two inner classes, Contents and Destination.
  • Contents class has a method value() and Destination class has a constructor using a String field and a method readLabel().
  • CreatingInner class has a method ship(String dest), that creates new instances of its inner classes.
  • We create a new instance of CreatingInner class, and call its ship(String dest) method to create new instances of the inner classes too.

Let’s take a look at the code snippet that follows: 

package com.javacodegeeks.snippets.core;

public class CreatingInner {

    public static void main(String[] args) {

  CreatingInner p = new CreatingInner();

  p.ship("Athens");
    }

    class Contents {


  private int i = 11;


  public int value() {


return i;

  }
    }

    class Destination {


  private String label;


  Destination(String whereTo) {


label = whereTo;

  }


  String readLabel() {


return label;

  }
    }

    // Using inner classes looks just like
    // using any other class, within Parcel1:
    public void ship(String dest) {

  Contents c = new Contents();

  Destination d = new Destination(dest);

  System.out.println(d.readLabel());
    }
}

  
This was an example of how to create an inner class in Java.

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