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Author Archives: maspanji

Changing Ubuntu hostname

This talk is about how to change the hostname in ubuntu . We’ll only need command prompt and text editor.


Dynamic DNS (DDNS) setup in home router

This talk is documentation about how to setup DDNS in home router Huawei HG8245H, to access mini web server (Apache web server) in raspberry pi that work in port 80. I use noip.com as a DDNS provider. Follow these steps to setup : (more…)

Read large gigabytes file in Java

Read large file in gigabytes using Java, requires simple techniques. We can not read all files and store in memory it consumes much more resources. Alternatively, we can read line by line and process it (displaying for example). In this talk, I’ll show a simple Java program that could do that task. Here is the code :


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…)

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 :