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Hello. This isn't a homework, just something I need help figuring out. I want to create a JAVA countdown timer with Netbeans. Details in the image below:

Basically, I want to create a countdown timer, where I input how many hours, minutes, and seconds left, and what message should be displayed when over. Let's say I put 1 hour, 2 minutes, 3 seconds, and message "Time's up". I click start, and a stopwatch appears on screen and starts the countdown. When done, the message appears on screen replacing the stopwatch. Design is irrelevant. The controls on top right corner, minimize to tray, minimize to taskbar, exit. Basic structure. Please do it via Netbeans and elaborate. Thank you upfront for whoever pitches in. Appreciate it.

Basically, I want to create a countdown timer, where I input how many hours, minutes, and seconds left, and what message should be displayed when over. Let's say I put 1 hour, 2 minutes, 3 seconds, and message "Time's up". I click start, and a stopwatch appears on screen and starts the countdown. When done, the message appears on screen replacing the stopwatch. Design is irrelevant. The controls on top right corner, minimize to tray, minimize to taskbar, exit. Basic structure. Please do it via Netbeans and elaborate. Thank you upfront for whoever pitches in. Appreciate it.