Problem
java version 1.4 2 not supported minimum version required is 1.6.0_04 Error while initializing SQL Developer.
Cause
Right Java version is not pointed to.
Resolution
Install java version 1.6.x - 32 bit , and point it to this version of java.
Go to
\sqldeveloper\bin\sqldeveloper.conf
and change following to point to new java
SetJavaHome C:\Program Files\Java\jdk1.6.0_16