Forgive me if this is a noob question - My CS education is a somewhat incomplete
Basically, I need a way to hash an input, so that someone seeing the output doesn't see the original input value. Security is not an issue, and I need to be able to make this unique across about 1 million inputs.
Originally I was using a hashcode() just fine, but when I started getting to around 1 million inputs, I had very high collision.
Can someone help me conceptually understand where I should look to approach this problem? Should I be trying to write my own function to do this? I thought I could just find a better hash function, like hashcode(), but I only find stuff about writing my own.