Add Longest Subarray with Sum K program in Java

[vaishnavi-parodkar]

Hi @Nikhil-2002
I would like to contribute by adding a "Longest Subarray with Sum K" program in Java.
Please assign this issue to me under Hacktoberfest 2025.
Once I'm done, I'll also explore and add a few more related programs if possible.

Thank you!

[Apurva1807]

Hi @Nikhil-2002, I would also like to work on this issue under Hacktoberfest 2025.
If it's not already assigned, please assign it to me.

[vaishnavi-parodkar]

Hi @Nikhil-2002, I would also like to work on this issue under Hacktoberfest 2025.
If it's not already assigned, please assign it to me.

I guess this repository is not active much I've been waiting to get assigned for past few days