why does java suck?

I've noticed in the short time I've been reading this board that there's a lot of java bashing, so I was wondering why people actually think it is so bad. I'm no java fan, but I've used it for some stuff before and it didn't seem terrible to me. An argument used to be that it runs slow as a guro-fied loli, but they've improved a lot in that aspect.

Please give good reasons, rather than stuff like "it's for certified professional consultants" or whatever you guys say.

Some undergrad asked me for help with his programming homework. He couldn't get to work correctly, so he did the logical thing and emailed the teacher for help. However, the teacher isn't a programmer. To the best of my knowledge, he's never worked a programming job. He's teaching here because pretty much every Computer Science Ph.D program has rejected him.

Anyways, the teacher said the problem was with the row count. However, fixing the row count made the problem worse. Then like I realized his teacher is a total dumbass. So I looked at the code again and told him to move one of his variables before the loop. And like, his code worked!