Added blog posts from jrtechs.net

entries/Java/testing-my-server.md

@@ -1,14 +0,0 @@
-#THIS IS A H1
-
-This page is merely for testing -- go away
-
-```
-int i = 0;
-```
-
-##This is a h2
-
-```
-python3 roosay.py
-```
-This is just to test what a paragraph looks like.

entries/hardware/ddr4-ram-introduction.md

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+Overview
+--------
+
+DDR4 ram is the successor to DDR3 ram and has many benefits. DDR3 ram is
+currently what most computers use, and it came out in 2007.
+
+What DRR4 Stand for:
+--------------------
+
+Double Data Rate Fourth Generation Synchronous Dynamic Random-Access Memory
+
+DDR4 achieved higher efficiency
+-------------------------------
+
+DDR3 ram operates on 1.5 volts where DDR4 ram only uses 1.2 volts. This 20%
+reduction on power is important in large databases where it can save millions of
+dollars. Also, a reduction of power consumption improves battery life in smart
+phones and laptops.
+
+DDR4 performance
+----------------
+
+DDR4 ram has the transfer speed of 2133 MT/s – 4266 MT/s.
+
+DDR3 ram has the transfer speed of 800 MT/s – 2133 MT/s.
+
+Due to the increase in DDR4’s speed it can supports more powerful processors.
+
+The cost of DDR4 ram
+--------------------
+
+Currently the cost of DDR4 ram is preventing many people from getting it. As of
+3/6/15 16 GB of DDR4 ram costs about \$205. That is high considering that DDR3
+only costs \$130 for 16 GB of ram. Not only does DDR4 cost more, you also need a
+DDR4 compatible motherboard and processor which are only produced by Intel right
+now (as of 3/6/15).
+
+i7 5820K Intel processor \$390
+
+Intel DDR4 motherboard \$244
+
+16 GB DDR4 ram \$275
+
+In conclusion
+-------------
+
+I would not recommend shelling out money for DDR4 until prices fall in 2016. The
+typical user would not notice any tangible benefits by upgrading to DDR4 ram at
+this moment. Although the speed bump is nice, you probably will not notice the
+difference unless you are a high end user.

entries/hardware/hard-drive-speeds.md

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+Many people don’t realize that the slowest part of their computer is the hard
+drive. The read and write speeds of a hard drive affects the computer’s
+performance. The most affected processes are the boot time and time it takes to
+open an application.
+
+Experiment 
+-----------
+
+I decided to explore the speed differences between several types of hard drives.
+In all the trials I used a program called Parkdale for speed measurements.
+\*Please note that these are just the hard drives I had lying around, there can
+be great variation of performances between different manufacturers.
+
+5400 RPM Toshiba Laptop HHD
+---------------------------
+
+7200 RPM HHD
+------------
+
+Samsung 840 EVO SSD
+-------------------
+
+Kingston SSD
+------------
+
+Conclusion
+----------
+
+It may be easy to conclude that SSDs are fast and you should just use those.
+However, there is a time and a place for each of these HHDs due to their price
+point. It would cost a ridiculous amount of money to have two terabytes of SSD
+storage on my computer. My main computer has 120 GB SSD for my installation of
+Linux and a 2 TB HHD for all my personal files. In this case I get the best of
+both worlds. On one hand I get incredibly fast storage for all my programs which
+depends on read and write speeds of the HHD. On the other hand I get relatively
+cheap storage for all my movies and pictures.

entries/java/bash-usr-bin-java-cannot-execute-binary-file.md

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+bash: /usr/bin/java: cannot execute binary file
+-----------------------------------------------
+
+When you get this error, it means that you are using the wrong version of JDK to
+run a specific java file. To fix this you must uninstall your current version of
+JDK. Next you must install the correct architecture of JDK. This for most people
+means install the 64-bit version of JDK.

entries/java/top-three-recommended-java-ides.md

@@ -0,0 +1,50 @@
+An IDE (Integrated Development Environment) is a single program that wraps
+everything you need to program with. An IDE usually consists of a code editor,
+debugger, and a compiler. A good IDE can make you more productive. Without a IDE
+you would be stuck writing all of your apps in notepad and compiling via command
+line – which is not bad for learning how to program. A good IDE has syntax
+highlighting which makes the code easier to read and error highlighting which
+makes finding that missing semi colon easier. Here is a list of three IDEs that
+work well for me.
+
+NetBeans
+--------
+
+NetBeans is the most productive IDE for large java projects. NetBeans is great
+at detecting errors in your code. You can also have multiple projects open in
+the same window which is great for anyone who is constantly flipping between
+projects – even if they are in different coding languages. This is a must have
+program for everyone looking to develop Java. This program also supports PHP,
+JavaScript and C/C++.
+
+Eclipse
+-------
+
+Eclipse is a very popular programming IDE; however, it is harder to use than
+NetBeans. The largest benefit of Eclipse is that it has tons of templates for
+you to use. Eclipse also has a better GUI creation tool than NetBeans has.
+
+JCreator
+--------
+
+I want to warn you that this is a old IDE. You hate yourself if you decide to
+use this program. The only reason I am putting this on my list is because I
+think it is great for teaching people how to program – it’s what my high school
+used. Unlike Eclipse and NetBeans, it gives you very little help when writing
+your code. There is no autocompletes or dropdowns when you are accessing members
+of an object. This does not even give you red highlights when you have a syntax
+error. What it instead shows you is the errors that you would receive in the
+command line when you compile this project. This is great for AP Computer
+Science students who have to memorize/learn what certain errors mean.
+
+Intellij
+--------
+
+\*Update 2018
+
+I have converted to a full time Intellij user since writing this article in
+2015. This program is simply fantastic in every aspect – expect ram usage. If
+you have never heard of Intellij or any of the other JetBrains products I would
+highly recommend you check them out. The main reason I switched was because
+Intellij could scale nicely to 4k and NetBeans did not. The user experience
+overall feels nice.

entries/other/should-you-run-a-server-on-desktop-hardware.md

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+Short Answer
+------------
+
+The short answer is: yes, if it is not on an enterprise site.
+
+Long Answer
+-----------
+
+I have hosted numerous servers on old desktop hardware, there is nothing wrong
+with this. Old computers can make excellent file, Minecraft, and web servers.
+However, if you are honestly asking the question “should you run a server on
+desktop hardware” it implies you are running something important. Don’t get me
+wrong, running a Minecraft server is **very** important, however, it is not as
+important as a production web server for a larger company. In that case it is
+better to have an actual server with redundant power supplies and hot swappable
+hard drives.
+
+Another factor to seriously consider is your internet speed. When I was in
+seventh grade I ran an apache web server on my old computer. Since I was running
+on DSL, the website loaded like it was 1990. If you need high bandwidth, I would
+recommend you get a VPS at Digital Ocean.

entries/other/ways-to-avoid-getting-hacked.md

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+Please note that these are just personal recommendations, and this article was
+written in 2014.
+
+1.  Avoid bad websites.
+
+2.  Have a good antivirus – Malwarebytes is pretty good.
+
+3.  Use a DNS filter like open DNS.
+
+4.  Have a good firewall if you have a front facing IP address.
+
+5.  Use Linux
+
+6.  Avoid less reputable program downloads
+
+7.  Use a VPN on public networks
+
+8.  Use a password manager for storing passwords
+
+9.  Disable Flash
+
+Linux
+-----
+
+Using Linux is not a guarantee way to prevent yourself from getting hacked.
+However, the way the system partitions memory makes it harder for viruses to
+gain root control. Nothing is preventing a virus from infecting a Linux machine,
+especially if you were the one who downloaded it and gave it permission. The
+likelihood of you stumbling on a Linux virus is less likely because most people
+write viruses for windows machines. There is a ton of viruses on websites that
+use JavaScript and Flash that can affect every operating system.
+
+VPN
+---
+
+Please be smart when using a VPN. Personally, I don’t trust any free VPN or
+proxy since it opens the door for a man in the middle attack. If you are
+genuinely concerned about your privacy I would use a personal VPN server is
+hosted at a place like Digital Ocean.

entries/programs/installing-all-your-programs-at-once-with-ninite.md

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+If you are anything like me, you find yourself installing windows a lot. It is
+always annoying to have to run to a dozen websites just to get your basic
+programs installed. To avoid this – and internet explorer – I use Ninite to
+install a batch of programs at once. The program is simple, you just go to their
+website and check off the programs you want and run their executable.
+
+![A screenshot of a cell phone Description generated with high confidence](media/90e4464eb85c998c8db42c965468aa54.png)

entries/projects/ackermann-function-written-in-java.md

@@ -0,0 +1,86 @@
+\`\`\`
+
+class Ackermann_function
+
+ {
+
+    public static void main(String[] args)
+
+    {
+
+        //prints intro
+
+        System.out.println("This program will solve for all values in ackermann
+function using recursion.1");
+
+        System.out.println("\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*n");
+
+        //calls for all values of ackerman using for loop
+
+ 
+
+        for(int i = 0; i \< 6; i ++)
+
+        {
+
+            for(int j = 0; j \< 10; j ++)
+
+            {
+
+                System.out.println("Ackerman (" + i + "," + j + ") is: " +
+ack(i,j));
+
+            }
+
+ 
+
+        }
+
+        //test sinlge
+
+        //System.out.println(ack(3,1));
+
+    }
+
+    public static int ack(int m, int n)
+
+    {
+
+        if(m == 0)
+
+        {
+
+            return(n + 1);
+
+        }
+
+        else if(m \> 0 && n == 0)
+
+        {
+
+            return(ack(m-1,1));
+
+        }
+
+        else if(m\>0 && n \> 0);
+
+        {
+
+            return(ack(m-1, ack(m,n-1)));
+
+        }
+
+    }
+
+ 
+
+ }
+
+\`\`\`
+
+The Ackermann function is a classic example of a function that is not primitive
+recursive – you cannot solve it using loops like Fibonacci. In other words, you
+have to use recursion to solve for values of the Ackermann function.
+
+For more information on the Ackermann function [click
+here](https://en.wikipedia.org/wiki/Ackermann_function).

entries/projects/batch-minecraft-launcher-with-auto-restart.md

@@ -0,0 +1,37 @@
+\`\`\`
+
+\@echo off
+
+color a
+
+title server Name
+
+ 
+
+:startServer
+
+echo starting server
+
+echo (%time%)
+
+java -Xmx1024M -jar caftbukkit.jar -o true
+
+ 
+
+echo (%time%) WARNING: Minecraft server closed or crashed, restarting
+
+ping 127.0.0.1 -n 5
+
+goto startServer
+
+\`\`\`
+
+This batch script great for Minecraft servers which frequently crash – for
+whatever reason. If you want to learn more about how this script works I would
+recommend that you look up a batch tutorial online. This script is just a big
+loop which restarts whenever the server crashes. If you like to use this, just
+copy and paste it into a batch file (ends with .bat) and make sure that it is in
+the same directory as your Minecraft server. Also, the “craftbukkit.jar” should
+be the name of the jar file that you use to run your server.
+
+Happy mining.

entries/projects/java-fibonacci-solve.md

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+The Fibonacci Sequence is a series of numbers where the next number is found by
+adding the previous two numbers.
+
+Ex:
+
+| n | 1 | 2 | 3 | 4 | 5 | 6 |
+|---|---|---|---|---|---|---|
+| x | 1 | 1 | 2 | 3 | 5 | 8 |
+
+\`\`\`
+
+class Fibonacci
+
+{
+
+   public static void main(String[] args)
+
+   {
+
+       for(int i = 1; i \< 60; i ++)
+
+       {
+
+               System.out.println("Fibonacci " + i + " is: t" + fib(i));
+
+       }
+
+   }
+
+//recursive definition of bibonacci
+
+   public static double fib(int n)
+
+   {
+
+       if(n == 1 \|\| n == 2)
+
+       {
+
+           return(1);
+
+       }
+
+       return(fib(n -1) + fib(n -2));
+
+   }
+
+}
+
+\`\`\`
+
+![](media/088cc48e754c1b99e0fcd5a5eddb9d64.png)
+
+I would like to note that solving each Fibonacci number recursively is not
+efficient due to the enormous stack it creates for higher elements. A more
+effective way to calculate the Fibonacci sequence is iteratively. I only did
+this recursively to demonstrate its recursive nature.

entries/projects/musical-floppy-drives.md

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+![video](<https://youtu.be/b65Av0gy_m8>)
+
+A more detailed description of how I made this will be coming soon.

entries/projects/timelapse-programming-pong.md

@@ -0,0 +1,15 @@
+![video](https://youtu.be/5OZfKYzYHPM)
+
+Downloads:
+
+[Demo Source Code](http://jrtechs.net/download/180/)
+
+![A screenshot of a computer screen Description generated with very high confidence](media/ad84021445feb7021f2320f6be599ef5.png)
+
+[Extreme VB Pong](http://jrtechs.net/download/70/)
+
+![A picture containing screenshot Description generated with high confidence](media/fc0a0ddf2a914b171bb3a5013e9e7b6c.png)
+
+[Extreme VB Pong Source Code](http://jrtechs.net/download/182/)
+
+![A screenshot of a computer screen Description generated with very high confidence](media/13f1d6d93532bfb23a03a9a4fec5f41b.png)

entries/projects/timelapse-programming-zombie-game.md

@@ -0,0 +1,20 @@
+![video](https://www.youtube.com/watch?v=KC9zrgMt1FA)
+
+This is a simple zombie shooter game that I made in visual basics. The graphics
+are very basic due to copyrights that I wanted to avoid – and lack of artistic
+abilities. However, this game is meant to be a demo so that you can learn
+something from what I did. If you enjoyed this feel free to download the source
+code (linked below).
+
+The music used in the video was called Aurora Borealis and it was downloaded
+from the YouTube Audio Library.
+
+Downloads:
+
+![A screenshot of a computer Description generated with very high confidence](media/d3f05acc1973ea938920407511c28bff.png)
+
+[Zombie Game YouTube demo](http://jrtechs.net/download/214/)
+
+![A screenshot of a computer Description generated with very high confidence](media/09d34d523359111041accf89c82fd6c2.png)
+
+[Demo source code](http://jrtechs.net/download/211/)