Ubuntu 12.04, configure JDK and rubymine

My friend strongly recommended sublime as a rails development IDE, but I am a Java programmer and cannot adapt to it at the moment, so I use rubymine.

0. Download and decompress JDK from the official website

$ tar -xzvf jdk-8u20-linux-x64.tar.gz

 

1. Copy to usr/lib

$ sudo cp -r ~/jdk1.8.0_20 /usr/lib/jvm/

 

2. Configure Environment Variables

$ sudo gedit ~/.profile

Add

export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_20

 

3. Update source and view environment variables

$ source ~/.profile
$ env

If the configuration is correct, the result should be java_home =/usr/lib/JVM/jdk1.8.0 _ 20

 

4. Modify the default JDK

$ sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.8.0_20/bin/java 300$ sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.8.0_20/bin/javac 300$ sudo update-alternatives --config java$ sudo update-alternatives --config javac

 

5. view the JDK version

$ java -version

 

6. Download and decompress rubymine

: Www.jetbrains.com/ruby/

$ tar -xzvf RubyMine-6.3.3.tar.gz

Enter bin and run./rubymine. Sh to open

Set: file --> Settings --> editor --> colors & fonts --> console colors

 

Ubuntu 12.04, configure JDK and rubymine