I was familiar with hundreds of perl/unix common how-to's. Need the same for java String and jdbc. Here are top 10 unfamiliar String
how-to's. Exact method names to be committed to memory:

boolean endsWith(String suffix)

boolean startsWith(String prefix, int toffset)

boolean equalsIgnoreCase(String anotherString)

int indexOf(String str, int fromIndex)

String replace(char oldChar, char newChar)

String trim()
Returns a copy of the string, with leading and trailing whitespace omitted.