Why are static variables considered evil?

Question

I am a Java programmer who is new to the corporate world. Recently I\'ve developed an application using Groovy and Java. All through the code I wrote used quite a good numbe

Answer 1

everything (can:) have its purpose, if you have bunch of threads that needs to share/cache data and also all accessible memory (so you dont split into contexts within one JVM) the static is best choice

-> of course you can force just one instance, but why?
i find some of the comments in this thread evil, not the statics ;)