Install Java JDK in Windows

Note: the version number 7u45 is subjected to be changed.

1. Goto http://www.oracle.com/technetwork/java/javase/downloads/index.html
2. Click "download Java Platform (JDK) 7u45"
3. Select "Accept License Agreement"
4. Click "Java SE Development Kit 7u45" -> Windows x86 -> jdk-7u45-windows-i586.exe (or Windows x64 if you are 64-bits system)
5. After download, run the .exe
6. Goto Control Panel -> System -> Advance -> Environment Variable
7. Select System Variable -> Path
8. Click "Edit"
9. Add a semicolon(;) and the JDK bin path at the end of the Path Value (e.g. ...PATH...;C:\Program Files\Java\jdk1.7.0_45\bin)
10. Click "OK"
11. Open a NEW Command Prompt window, type "javac" to test if everything is ok or not
12. Done!