Learning polymorphism using Java & Processing Library

When I learned the traditional “shape polymorphism” as object oriented concept, my brain was pushed to see an abstract result of  Java code that pretended, “Oh this text is drawing triangle (or square, etc)”. Actually there was no square, no triangle and there was only text that print something. Fortunately, today processing library exists. It can help us much to learn polymorphism by drawing a real shape ! In this talk, I’ll explain how to use processing library to learn polymorphism with, of course, Java code. (more…)

Make autologin for Lubuntu 16.10 (Lightdm)

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Connecting Ubuntu Mate in Raspberry Pi using TightVNC

Some people think that accessing Raspberry Pi using linux shell is not interesting. We only get the text only, the blinking cursor, etc. This talk will describe how to accessing Raspberry Pi (with installed Ubuntu Mate) using TightVNC to get the graphical user interface access. (more…)

Using Neo4j from Java with Netbeans and Maven

In this talk, we’ll talk about how to use Neo4j from java, step by step. We’ll use Netbeans 8.1 as IDE and Maven as dependency tool. We’ll start from creating new project, import dependency, and writing Java program. So, follow these steps : (more…)

Neo4j: creating nodes and relationship with CSV file

I’m sure that you don’t want to get you hands dirty by writing cypher query to create hundreds of nodes and relationship. In this talk, I’ll show how to make node and relationship from CSV file. First, we’ll make several user nodes and then we’ll continue with creating their relationship. (more…)

Neo4j : enter Neo4j browser without authentication

If you have a computer, you are on a development mode and you don’t want any complicated thing like login to access to your graph database, this post is for you. In this post I will show you how to disable login in Neo4j browser. (more…)

Neo4j : change the graph ‘style’

Sometimes you want to change your node color, node size, the information to display in each node, to display graph in Neo4J browser. This post will describe how to do it in simple way.  (more…)

Neo4j jump start : Part 2-Creating Node

After successfull instalation, the next step is to create a node (and we will continue with creating relationship in the next post). In Neo4J, a node consist of none or many attribute(s) and label. Here is an example of creating a “Book” node :

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Neo4j jump start : Part 1-Installation

Want to learn Neo4j in a hurry? Install it first! This “59 seconds video” will show you how to install Neo4j graph database (also, you can find how to start and access the Neo4j graph database for your first time). After the installation, you can do anything with Neo4j graph database. Here is the video :  (more…)

Memilih tutorial TI di internet

Di internet, ada begitu banyak tutorial teknologi informasi/komputer yang ditulis oleh banyak orang atau lembaga. Sebut saja tutorial yang disediakan oleh tutorialspoint, w3school, dan sebagainya. Namun, dengan begitu banyaknya tutorial, menimbulkan kebingungan dan justru malah meninggalkan semuanya (yang terakhir ini hanya opini). Pada tulisan ini, saya akan coba mengulas bagaimana cara memilih tutorial yang ada, setidaknya berdasarkan pengalaman pribadi. (more…)