For those with the same problem. here is the problem and the solution.
After installing jdeveloper 11 studio in ubuntu, an error appears when starting up.
The problem is the jdk bundled in jdeveloper. Download a newer JDK 6 (I did it with 1.6.0_33), then go to jdev.conf and replace SetJavaHome property with the new location.
Probably there is no problem when you download the jdeveloper generic installation.
Stack trace (for searches):
java.lang.UnsatisfiedLinkError: /home/oracle/Middleware/jdk160_24/jre/lib/i386/libsplashscreen.so: libX11.so.6: cannot open shared object file: No such file or directory