Only Chrome and Safari let you do mouse selection of elements while in debugger mode though, so in Edge or Firefox, you might have to do the drilling through the Elements tab to find what you need manually. This is what the help file says as far as the integrated debugger goes: For both the Windows and UNIX/Linux startup programs, to use the integrated Java debugger, 'java.exe' or 'java' must be in the JDK directory structure (in /bin, where tools.jar is in /lib), unless the '-cp' command line argument or JGRASPCLASSPATH environment variable is used. I tried this, and it works, in Chrome, Firefox, Edge, and Safari, so it’s a pretty cross-browser DevTools friendly trick. setTimeout(function(), 3000) Give yourself a few seconds to get the DOM how you need it, then the debugger will fire and you can inspect as needed. But when I create the jar file of the program and start it up outside of JGrasp it wont access the database for some reason. Run IteratorError.java and observe its output. Open IteratorError.java in jGRASP and compile it. You can identify and learn to correct this common error through the steps below. Or (Tim Holman taught me the trick) you can trigger it with a setTimeout() right from the console. 1 I've written a Java program that accesses an SQL database. Computer Science Computer Science questions and answers A common error in using iterators arises from a misunderstanding of what the next () method actually does.
Jgrasp debugger wont pause very long code#
You can put that debugger statement right in your code where you need it (remember DevTools has to be open for it to work). This is your opportunity to select that otherwise-impossible thing to select and do what you need to do. Theres not much we can advise here, this is an environment issue. Atleast determine that its JGrasp that is broken and not Java. No more events are fired and script excecution is completely paused. I would try compiling and running in the terminal. The trick is to fire a debugger right when you need itĪ debugger statement, when the DevTools are open, kinda freezes the DOM. This is very useful, but won’t help us here. It doesn’t fire the DOM event, it just simulates the CSS state. Recall: To run a program indebug mode, click the debug icon(looks like a ladybug).Recall: To resume a stopped program, press the top-leftplayorstepbuttons. Try as I might, I just can’t target that newly-added element for inspection.Ĭhrome DevTools can simulate a :hover style, but that doesn’t really help us here.
Say I inserted an element on the mouseenter event of a certain other element, then removed it on mouseleave. The DOM events needed to work with the DevTools themselves can interfere. Right click on something and “Inspect Element”, or, open DevTools and use its selection tools to grab what you need.īut… sometimes it can be difficult or impossible to target the element you need to target in the DevTools. If you need to see (and play with) the styles on any given element, a quick inspection is only a few clicks away. The DevTools (in any browser) are an invaluable development tool for CSS developers.
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