IntelliJ has a wonderful feature which, during debugging, allows for the evaluation of code at runtime, this is one of my favourite debugging utilities and is accessed through ALT+F8.

I've been using Netbeans more and more recently and could not for the life of me figure out if there was an equivalent function... well there is, and it's CTRL + F9 which gives you this little wonder.

Once the window above appears you can just type in your expression (using CTRL + SPACE for code suggestion/ completion) and hit enter to see the results! I'm so pleased I've discovered this, I knew it had to be in there somewhere in NetBeans - it's just a shame it took me this long to find it!

EdD