I have found no clear install instructions for fixing the Java issues on Linux. I have downloaded and installed (from Sun/Oracle) jkd1.0.7_25 TWICE and also have installed processing twice. I still get this error when running the following command

clair@clair-p7-1226s ~/processing-2.0.1 $ ./processing

>>>
clair@clair-p7-1226s ~/processing-2.0.1 $ /opt/java/jdk1.7.0_25/bin/../bin/java: 1: /opt/java/jdk1.7.0_25/bin/../bin/java: Syntax error: end of file unexpected (expecting ")")
<<<

The error is quite unhelpful it seems to say that the file which has the error is the java file in the /bin subdir of the jdk1.0.7_25 directory.

I am running this on:
Linux Mint 15
version:
3.8.0-25-generic #37-Ubuntu SMP Thu Jun 6 20:47:30 UTC 2013 i686 i686 i686 GNU/Linux

(I am finding it impossible to understand why such a wonderful language implementation as Processing is should have an extremely complex installation. Seems to nullify the beauty and simplicity of Processing itself.)

I am desperate to get going with processing so I will be grateful for any help. Especially a pointer to some clear explanation of exactly how do deal with the java problems which processing seems to have embedded in its installation.

Thanks much.
Clair