Noncontroversial statement: sqlplus sucks, doubly so after you’ve seen what a decent sql client (eg: mysql) can do. Henplus might just make sqlplus a distant painful memory - “HenPlus is a SQL shell written in Java that works for any database that offers JDBC support.” The used-it-for-five-minutes verdict: Kick. Ass.
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More neat things coming with Java 1.5/5.0/Tiger: better diagnostic tools
One change coming in 1.5 that I wasn’t aware of: variable length argument lists. While I see the power and flexibility in this, I can’t wait until I first see code like public void foo(Object... values) { }. That will rock.