Pasos para instalar SQLDeveloper en ubuntu installed SQL Developer with these steps

I installed SQL Developer with these steps:

1. (See the comments—this might not be necessary)
   Download and re-install newest Ubuntu 14.04 LTS from Ubuntu website.
2. Install Java:
   

   sudo apt-get install openjdk-7-jdk openjdk-7-jre icedtea-7-plugin
   sudo update-alternatives --config java
   

3. Download SQL Developer from Oracle website (I chose Other Platforms download).
4. Extract file to /opt:
   

   sudo unzip sqldeveloper-*-no-jre.zip -d /opt/
   sudo chmod +x /opt/sqldeveloper/sqldeveloper.sh
   

5. Linking over an in-path launcher for Oracle SQL Developer:
   

   sudo ln -s /opt/sqldeveloper/sqldeveloper.sh /usr/local/bin/sqldeveloper
   

6. Edit /opt/sqldeveloper/sqldeveloper.sh and replace it's content to:
   

   #!/bin/bash
   unset -v GNOME_DESKTOP_SESSION_ID
   cd /opt/sqldeveloper/sqldeveloper/bin
   ./sqldeveloper "$@"
   

   or (to prevent error: ./sqldeveloper: Permission denied)
   

   #!/bin/bash
   unset -v GNOME_DESKTOP_SESSION_ID
   cd /opt/sqldeveloper/sqldeveloper/bin && bash sqldeveloper $*
   

7. Run SQL Developer:
   

   sqldeveloper
   

   Note: When you run Sql Developer at the first time, you need to specify the path of JDK's folder. In my computer, JDK stored at /usr/lib/jvm/java-1.7.0-openjdk-amd64
   

8. Finally, create desktop application for easy to use:
   

   cd /usr/share/applications/
   sudo vim sqldeveloper.desktop
   

   add this lines:
   

   [Desktop Entry]
   Exec=sqldeveloper
   Terminal=false
   StartupNotify=true
   Categories=GNOME;Oracle;
   Type=Application
   Icon=/opt/sqldeveloper/icon.png
   Name=Oracle SQL Developer
   

   then type:
   

   sudo update-desktop-database