Generate javadoc from JDK (src.zip)

[restless_man]

1. cp /src.zip
2. cd
3. unzip ./src.zip
4. find . -name '*.java' -type f| xargs -n 1 dirname | sort -u| sed -e 's/\//./g'| sed -e 's/..//'| xargs javadoc -d javadoc