2019-08-07 20:30
Hi all,In this post you can find java code example to fetch HTML source of the given website URL.Getting a website source code can be useful in many scenarios. For example you might want to… Read More
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IT code tutorials and How To guides, software development best practices and design patterns.
2019-08-06 17:03
Hello,In this post you can find potential fixes for issues related with Git and SSH keys, in particular troubleshooting permission denied publickey error.This error usually manifests itself… Read More
2019-08-04 10:35
Hello!In this post you can read about initial Git setup including setting up things such as user name and user email that can be set up either globally or locally for the given project repos… Read More
2019-08-03 22:32
In this post you can find about quick and easy way to clean and release cache memory under Linux Ubuntu system.If you Unix system slows down by time it might be useful to release some o… Read More
2019-08-02 20:47
Hi,In this post you can find out about useful audio recorder tool under Linux system.Many times if you listen to music via the streaming service or radio you may want to record it so you can… Read More
2019-08-01 21:06
In this post you can find potential workaround fix for issues with unmet packages dependencies under Linux system.Recently I have come across tricky issue related to the installing 32-b… Read More
2019-07-31 20:58
In this post you can read about recommended setup and most useful keyboard shortcuts for Eclipse and IntelliJ IDEA software development environments.Best practice IDE settings include the fo… Read More
2019-07-30 21:16
In this post you can find out few different ways for setting up environment variables under Linux system.In many situation you need to have some variable set on the system in order to use so… Read More
2019-07-29 20:01
In this post you can find trick for automatic redirection to different URL using HTML meta tags.There are several ways of achieving above... One of it is using just HTML and editing block i… Read More
2019-07-26 22:28
In this post you can find out how to use xrandr to to setup multiple monitors on Linux.Having problems setting up multiple screens under Ubuntu Linux? Recently I have come into an issue… Read More
2019-07-09 19:54
Hi there,This post provides some tweaks you can make to increase debug timeout settings. If you debug standalone desktop application you can just increase timeout settings in the debugger /… Read More
2019-07-08 20:22
In this post you can find a workaround solution to start using flash player in debug mode on Linux 64 bit machine.Hi,In order to use flash in the debug mode you will need the flash player de… Read More
2019-07-07 10:44
In this post you can find out how to create a HTML link that will add a page to a bookmarks aka favourite pages.Ability to simply add your website to someone's bookmarks list can increase y… Read More
2019-07-06 09:11
In this post I will describe how can you get a date from remote server in Java.Date objects in Java are quite common. Usually if you want to get the current date and time you just need to cr… Read More
2019-06-30 11:43
In this post I show command that will fix missing footers and title bars (or headers) on Ubuntu system.Few times I have noticed after log in to the Ubuntu or XUbuntu system there are no titl… Read More
2019-06-26 19:55
VPN Nortel is a popular VPN solution however it may not work on your OS if you are using Linux. You may want to use VPN Nortel connection via vpnc client on Ubuntu. The d… Read More
2019-06-24 22:04
Hi,In this post I try to show how you can mount FAT32 partition type using fstab configuration on Ubuntu.Mounting partitions on LinuxThere are several ways you can mount a partition under Ub… Read More
2019-06-23 15:39
In this post you can find steps and instructions for getting Q bot on your IRC channel.What is QuakeNet?QuakeNet is a very popular IRC network. You might hang out there, talk with friends, e… Read More
2019-06-22 13:28
Hi!Quick post about problems with touch-pad under Ubuntu system. If you have any issues with it you can try the following workaround to fix problem with your touchpad under Ubuntu system.Som… Read More
2019-06-21 19:05
In this post you can find few useful Maven command such as installing third party jar, purging local maven repository and more.Install third party jar into the local maven repositorymvn inst… Read More
2019-06-19 18:16
Hi,When it comes to graphic card driver or related display stuff and Linux it's quite common to come across unexpected behavior. Sometimes after usual system update/upgrade your graphic driv… Read More
2019-06-18 19:39
Hello,In this post you can find out how to switch on Android Developer Options on your mobile phone.Android Developer OptionsIf you have connected your mobile phone via USB to your PC in ord… Read More
2019-06-17 22:11
Hello all,Untracked working tree files are basically just new files that have never been commited to your Git repository.Unable to switch to a different Git branch? Having untracked fil… Read More
2019-06-16 20:42
This blog is deprecated. New version is available at: https://itcodehub.blogspot.com/ Read More
2019-06-16 14:17
Hi,One day I was trying to connect and login to Windows server using remote desktop. Unfortunately I was surprised to see the following error message:The terminal server has exceeded the max… Read More
2019-06-16 13:50
In this post I want to show the most useful SCP commands such as copying files and folders to and from the remote host.What is SCP?SCP is a command line tool that allows you to transfer file… Read More
2019-06-15 15:25
DRY and KISS are two basic engineering principles. In this article I will discuss them.DRY - "Don't Repeat Yourself".This principle was created by Andrew Hunt and David Thomas in their book… Read More
2019-06-15 15:19
In this article I present an example of the implementation and main assumption of the builder design pattern.Builder Design Pattern - why and how to useUsually, we create classes and initial… Read More
2019-06-15 15:06
Hi,Quick post about difference between GROUP BY and PARTITION BY in SQL Server.GROUP BYIn "select" we need to use only columns which are used in group by.In "select" we can use aggrega… Read More
2019-06-15 15:02
Open-Closed principle - introductionThe second principle of SOLID is the open-closed principle. This rule was described by Bertrand Meyer in 1988. In the book Object-Oriented Software Constr… Read More
2019-06-15 15:02
Today I am going to show you what it is Optional type in Java and how to use it correctly. Java 8 provides us with a new Optional class, which allows for better protection against null point… Read More
2019-06-15 13:27
Hello there!So as most of you are aware Git is a powerful tool with lots of flexibility. Even in a well established development teams with all the best practices and pull request process in… Read More
2019-06-15 13:26
Hello all!Git reset proves itself to be quite useful and I use it quite often. There are three types of reset:softmixedhardSoft mode will it makes the changes uncommited and staged (i.e. rea… Read More
2019-06-15 10:55
Hi,Let's cover very common topic of concatenating strings in Java. You can use simply '+' sign between strings or you can use helpers available either StringBuilder or StringBuffer. See the… Read More
2019-03-30 07:14
The SOLID principles is a group of five programming principles which are considered to be the foundation of every well designed application. SOLID principles help software developers to achi… Read More
2019-03-27 22:27
Hi all,Today quick post about altering a column: null to not null. So we have a table [DimProduct]. In this table we have a column Weight which allows nulls. In table we store both ki… Read More
2019-03-24 20:05
Hello,Quick post about fixing some missing Networks functionality under Ubuntu OS.After some usual system updates suddenly my Network WiFi icon disappeared and interestingly it happened befo… Read More
2019-01-26 19:45
Hello,In this article we will discuss Java exception propagation.What is propagation?Whenever exception is raised from a method then it is first thrown from the top of the stack.When excepti… Read More
2019-01-20 11:54
Hi!In this article, I would like to show the best way to delete duplicate records from a table in SQL Server. You can find copies using group by. It is one of the easiest way to do it.To do… Read More
2019-01-18 19:35
Hello!Back in the old days I was manually building and deploying WAR into my local tomcat server. I could start local instance of Tomcat appserver in the debug mode and then attach to the gi… Read More
2019-01-13 14:37
Hi!In short there are two ways you can deploy your app to Google AppEngine platform:Solution 1:Using a good old appcfg script, for example:appcfg.sh update /home/user/dev/project/target/appn… Read More
2019-01-10 19:33
In SQL Server we can use the PIVOT function to transform the data from rows to columns.For example we have table FactFinance that contains the following data:There are seven depart… Read More
2019-01-06 20:30
One day you've decided you want to change the address of the blog, or maybe create a new blog but include all the posts you previously done on your old blog?Well luckily there is quite an ea… Read More
2018-05-04 22:15
In this guide I will try to explain how you can generate SSH key under any OS assuming you have access to the command line tool called ssh keygenOn many Linux distributions is comes out of t… Read More
2018-05-03 21:42
Recently I was trying to use apt-get to install something, for example sudo apt-get install sshUnfortunately out of the sudden the following error occurred:Could not get lock /var/lib/dpkg/l… Read More
2018-05-03 21:40
This blog posts have been migrated to the IT Code Hub blog Read More
2018-04-30 20:43
It might not be very common these days but here it is - follow the steps below to install Tomcat as a Windows service.STEP 1 - install Tomcat as a new serviceIf you don't have a Tomcat go ah… Read More
2018-04-28 21:08
Hello!In this guide I will try to cover basic steps to setup Git on your local environment, up to the point of cloning Git repository. So if you are ready follow the steps below.STEP 1 - dow… Read More
2016-04-22 22:16
Hi all,Today we are going to cover topic about moving from Subversion to Git and ways to copy / migrate SVN data to Git repository (so we can keep the history of commits)I would recommend do… Read More
2016-01-04 08:01
Hello,Untracked working tree files are basically just new files that have never been commited to your Git repository. They might prevent you from switching to another branch. You can see err… Read More
2015-12-05 19:58
Hi,Sometimes after usual system update/upgrade your graphic drivers can also get updated. On some occasions you may have few issues after such update including for example:cannot login to th… Read More
2015-09-15 19:08
Hi,If you have connected your mobile phone via USB to your PC in order to test the app you are developing you may end up having problems. Your IDE may not be able to find your device until y… Read More
2015-08-07 19:05
Hello,Here are some commands and settings which you may find useful when working with Maven.Installing third party JAR artifacts into the local repositorymvn install:install-file -Dfile=<… Read More
2015-08-01 18:18
Hello,Gerrit is a great tool for pre-commit code review. Installation on Linux based OS is kind of default and it's nice and simple. However when you try to do it on Windows you may end up h… Read More
2015-07-30 19:30
Hello,Git is getting more popular and it's really good. So here is a quick introduction how to get started with it.First step is to install the tool - you can download it from the official w… Read More
2015-07-27 21:02
Hello,This topic may be a bit confusing but here is the story.Let say we have a SH script startApp.sh and we would like to run it on Windows because there is no equivalent BAT script availab… Read More
2015-03-01 18:53
Hello,If you develop and publish mobile apps you will most likely see some crash reports with some kind of stack trace attached. If you used ProGuard to obfuscate the code it may be difficul… Read More
2015-01-25 11:57
Hi,Today basics of implementing the share action which should let share content via e-mail, SMS message, etc. The common way would most likely be to use the action bar and it's menu icons.So… Read More
2015-01-18 15:50
Hiya!If anyone is looking for how to install Windows 7 from USB drive here it is. This guide is for people who run Linux.One of the most popular and common tool for creating bootable pendriv… Read More
2015-01-16 23:11
Hi,Some time ago we have posted about resolving git errors related to permissions denied for the ssh keys: http://devmain.blogspot.co.uk/2014/09/git-error-permission-denied-publickey.htmlThe… Read More
2015-01-11 21:35
Hi,If you would like to send e-mails directly from within your mobile app you can use Java Mail API. Here is the special lightweight port for Android:https://code.google.com/p/javamail… Read More
2015-01-04 19:54
Dumping/backup table for the MySQL databasemysqldump -u <dbuser> -h <dbhost> -p <dbname> tablename > tablename.sqlRestoring datamysql -u <dbuser> -h <dbhost>… Read More
2014-11-18 22:33
If you are making an Android application it's good to test it on the real device while still in the middle of developing process. Probably the best way to do that it to just connect your mob… Read More
2014-11-16 12:37
There are few scenarios when your system may stop launching due to GRUB misconfiguration.For example what I did recently was to extend the Ubuntu root partition using the live cd. It went we… Read More
2014-09-09 07:39
Hola!After installing Git client it's ready to use right away. However there are few things you may want to consider setting up. Those are things like for example user name and e-mail addres… Read More
2014-09-08 11:58
Hi,There are at least 2 ways of making incoming calls to your test device (either real device or emulator).Solution A: Make the call from within Eclipse DDMS UISolution B: Make the call usin… Read More
2014-09-07 10:34
If you want to install and run APK on the emulator device follow the steps below. You will be using adb script which should be located in android-sdks/platform-tools/1. List the available d… Read More
2014-09-06 09:01
Hello,The other day I was trying to fetch the changes from the remote repo and the following error has been displayed:$ git fetch origin Agent admitted failure to sign using the key.# Permis… Read More
2014-04-28 20:43
Hi there,If you remember older post about it: Flash Player debugger for Linux x64 ...it may not always work - recently I come across the error message:"no appropriate viewer found" (whe… Read More
2014-04-15 20:03
Hi there,Today will be giving instructions about installing Android OS on the VirtualBox.Pre-steps / requirement:1. Download the latest Android ISO image: http://code.google.com/p/andro… Read More
2014-04-15 20:03
Hi there,Following the post about installing Android OS on VirtualBox: http://devmain.blogspot.co.uk/2014/04/how-to-install-android-on-virtualbox.htmlit would be useful to make use of s… Read More
2014-04-14 17:14
Hi,Finally I've managed to resolve the issue with broken touchpad on my Dell laptop under Ubuntu 12.04 OS :)Run the following commands as sudo:sudo modprobe -r psmousesudo modprobe psmouse p… Read More
2014-02-22 15:29
Hi there,Imagine the scenario when you have just finished developing your cool mobile application and want to share it with the world.Hold on a moment before you do it and consider below lis… Read More
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