This week's book giveaway is in the Reactive Progamming forum. We're giving away four copies of Reactive Streams in Java: Concurrency with RxJava, Reactor, and Akka Streams and have Adam Davis on-line! See this thread for details.
Hi, I've been struggling with coding this form for many days. I hope someone can point out to me what went wrong. If a person leaves a blank, then an error message will appear. However, if I didn't enter anything, 2 similar messages appear, which is what I don't want. I only want error message to appear if it is blank or if the data does not conform to the regular expression. Also, I'm not so how to validate the radio button. please please help me.