I'm trying to use Breakpoints in Eclipse, but when I set them - nothing happens.
Really.
For example in MVS when the program reachs breakpoint it stopps and I can see variables.
How to use breakpoints in Eclipse in the same way?
you need to be debugging the program, click the little bug next to the run button instead of said run button
First select Debug perspective as:
Then set Breakpoints at places you want:
After that create a Debug configuration via Debug As->Debug Configurations... and then Debug as Android Application as shown below:
Then in Debug perspective you can trace/watch value of your desired variable by pressing F8:
That's it, you can also evaluate expressions through Expressions view. If it is not enabled select it from:
Window->Show View->Other->Debug->Expressions.
Related
I have a Java Maven Project started in Eclipse, worked on it a few days, then imported it in IntelliJ IDEA, again working on it a few days.
The normal Run/Execution in IDEA and via shell does work, but not the Debug.
When I click the Bug Icon for Debug, it opens up URLClassLoader.java file and points on the Line "throw new ClassNotFoundException(name)" and pauses the Debug, if I click Resume Debug, it shows several Classes that do not belong to my project. I can click the Resume Button endless, it shows the same classes, also ClassNotFoundException over and over again in a continuously loop and does not debug my source.
If I click Build -> Rebuild Project it says at the Debug icon
"Hot Swap failed
myClassname: schema change not implemented;
myClassname: Operation not supported by VM"
In the Debug window under Variables it says: "Frame is not available"
The Debug of this project in IntelliJ IDEA did work previously, whats wrong now?
Looks like you have an exception breakpoint on ClassNotFoundException. Please try to open Run | View Breakpoints... and uncheck the breakpoint under "Java Exception Breakpoints".
in my situation, just neglect the evaluate language drop down.
This is really helpful. Go to your breakpoints in debug mode and make sure to deselect all the breakpoints first and then select only the ones in your class.
I'm debugging a Java (Android) application in Eclipse Indigo. In the debug perspective, if I'm stopped at a breakpoint, when I hover over a variable to see its value it displays a blank, white box (where I assume the variable's value is supposed to appear?) but with no content. It does not seem to matter what kind of a variable it is, local or class-scope, static or instance, the box is just as blank.
I can see the variables I need to see in the variables tab of the debugger perspective, but it would be a lot more convenient to see them by hovering.
In Preferences>Java>Editor>Hovers I've tried it with both Variable Values and Combined Hover with no improvement. I'm running on Windows 7, if that matters.
N.B. I have read this thread: Eclipse: Hover broken in debug perspective
Try to hit the restore defaults as described in Eclipse: Hover broken in debug perspective. Make sure to stop your debug run and restart.
You might also check Eclipse's Debug view documentation.
Try refactoring a package in your project then trying it again.
Could also be a bug
https://bugs.eclipse.org/bugs/show_bug.cgi?id=357127
Which version are you using?
I am seeing the same thing on Ubuntu. I am using the program VcXSrv on my Windows 10 system to get program windows from Ubuntu.
I had to turn off The 'Native opengl' option in the XLauncher when starting VcXSrv to get the hover text to appear.
I have tried to use breakpoint in the same way we use break point in Visual Studio or Netbeans, we simply mark the break point and when statement executes, the breakpoint highlights and we can see the values in respective data structure or variable using breakpoint explore.
As far as i have used eclipse, i have found break point is there too, but it is not in that way, means on runtime it does not pick the respective point and neither i can see values nor the application works perfectly while doing that. Is it not possible in eclipse or some tool is required, or i am wrong, please guide.
Ctrl+Shift+B while on the line.
Double click on the left most bar in Editor View.
Right click > Toggle Breakpoints on the left most bar in Editor View.
put a breakpoint at you code line you want,
then right click on project-> debug as -> android application
then go to window menu -> show view -> other... -> debug
or as show bellow
You must set a breakpoint and run the application in debug mode.
You have to launch application in Debug Mode. You can find Debug button left to Run button. It has bug as an icon.
Also could be useful: Setting up a Device for Development. It describes how to enable debugging on your device
While debugging I get breakpoints from code that is not mine and for breakpoints I have not set.
Either it seems to come from libraries included or from java source code somehow.
Example:
Question:
This is really annoying. I can not find a way to disable these breakpoints and I keep pressing Resume constantly to move on.
How can I remove them or disable them? The breakpoint tab shows only my breakpoints available to be skipped or deleted
You can unset the following parameter in Eclipse:
Window -> Preferences -> Java -> Debug -> Suspend execution on uncaught exceptions
I'm currently coding with Java in Eclipse, and I'm trying to use Eclipse's built in debugger to try and debug my code. However, once I enter debug mode and try to run the program till the breakpoint, the variables aren't showing up in the variable window. Any ideas?
Make sure you're not in the Breakpoints tab as opposed to the Variables tab on the top-right window in the Debug perspective. When in doubt, simply go to Window > Show View > Variables.
This is usually caused by a rendering bug in Eclipse. Often letting the application run past the breakpoint, then trying to re-run again to the breakpoint fixes the display. Other times you have to restart the IDE.
I just had a similar problem, I could only see method arguments and this members, but not local variables. I was searching in all possible project settings and found out this checkbox ("Add variable attributes to generated class files") wasn't checked. Make sure all 3 options (used by debugger) are on :