hi is there a config file or something which can updated for provide JDK classpath etc. for me it keeps on asking java path and never works
The 'sqldeveloper.conf' file in the sqldeveloper/bin folder.
Depends on the version of SQL Developer.
3.2 and prior, see the previous answer.
V4.0 and higher, it's defined in product.conf, which is NOT in the product home/bin directory.