I want to use rsId in Java to query VCF files. How can I accomplish this?

[Opticalproperty]

hello,samtools developers!
I simply need to utilize the rsId for indexed queries on VCF files. What steps should I follow?

[lindenb]

there is no built-in index to go from a rsId to a variant location. Use an external library to build such database. Something like https://github.com/dain/leveldb