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Haven't had one of these for a while. I was busy doing other things.

Since it's been so long, I'll pose an easy quiz today:

Q: What does the following command print?

weiqi@gao /opt/jdk1.7.0_04/bin$ ls | wc -l

(/opt/jdk1.7.0_04 is where I installed my JDK, your JDK installation locations may vary.)

Strict rules apply today: You have twenty minutes to think about it and you must write down your answer before you go to your JAVA_HOME and run the command.