In C#, Java, or some other language with thread-based event handling, build a simple program around the “pause button” of Examples 9.51–9.54. Your program should open a small window containing a text field and two buttons, one labeled “pause”, the other labeled “resume”. It should then display an integer in the text field, starting with zero and counting up once per second. If the pause button is pressed, the count should suspend; if the resume button is pressed, it should continue.

Note that your program will need at least two threads—one to do the counting, one to handle events. In Java, the JavaFX package will create the handler thread automatically, and your main program can do the counting. In C#, some existing thread will need to call Application. Run in order to become a handler thread. In this case you’ll need a second thread to do the counting.