In this section, we present the watch command, which tells the debugger to watch a field. When that field is about to change, the debugger will notify you. In this section, you will learn how to use the watch command to see how the Account object’s field balance is modified during the execution of the AccountTest application.
As in the preceding two sections, we assume that you have followed Step 1 and Step 2 in Section Q.2 to open the Command Prompt, change to the correct examples directory and compile classes AccountTest and Account for debugging (i.e., with the -g compiler option).
Starting the debugger. Start the debugger by typing jdb.
Watching a class’s field. Set a watch on Account’s balance field by typing ...