This question already has answers here:
Eclipse - Unable to install breakpoint due to missing line number attributes
(42 answers)
Closed 5 years ago.
When i put breakpoint it show given error:
Unable to install breakpoint due to missing line number attribute
I tried most of the option found on stackoverflow still same issue.
Now same error shows still debugging works fine. Why this error come?
If the source code of the class is in a Java project and compiled by Eclipse, do the following:
Right-click on the project that contains the code and choose Properties...
In Java Compiler check Add line number attributes to generated class files (used by the debugger)
This mostly happens when the project is not built properly (can be due to many issues such as project build properties have not been set properly, build runtime issues, file paths and location reference issues of the source files to the project, etc..). Not only in Eclipse, but in most IDEs, this happens where the line number mapping is not synced with the source code.
I suggest to first check on the build properties and env setup to (clean and) build the project properly, and then try out and see.
Cheers
Related
So I was making a java program in Netbeans IDE 8.2 and when I tried to run it, I got this error:
Error: Could not find or load main class helloworld.HelloWorld
C:\Users\name\AppData\Local\NetBeans\Cache\8.2\executor-snippets\run.xml:53: Java returned: 1
BUILD FAILED (total time: 1 second)
(Assume that helloworld is my project name and HelloWorld is my class name)
Everything was fine before, and I can't think of what I did that would cause this error to happen. This is the first time this error has happened to me so I don't know what to do. The code doesn't seem to have any errors.
Other projects of mine seemed to also have the exact same problem even though I haven't opened or edited them in weeks prior to this error occurring.
I tried many other ways but none of them seems to do the trick. Including deleting the cache folder and setting the main class through the properties tab.
Here's a screenshot of my code with the error, my name is crossed out:
Even if I type my code directly in the main class, which is class6homework.java, the error still occurs but it says class6homework.class6homework instead of the one in the screenshot.
Any ideas on how I could fix this?
UPDATE: I got it to work by moving the folder that contains the project to my desktop, didn't know why it wouldn't work in my original location. Thanks for the help.
Perhaps you don't have the main method included. If that is not the problem, try right clicking your class in the project tree and look for an option that says "Set as main class" or something like that
Possible Fixes:
Fix 1
Go to project properties (right click on the folder of your project in netbeans)
On left tab where it shows the categories, click on the "Run" selection
Then click on Browse to find the Main class you use on your project
Fix 2
Go to C:\Users\name\AppData\Local\Netbeans
delete the Cache folder.
Rebuild and Run
Fix 3
Download most recent version of Netbeans
Fix 4
Download most recent version of JDK and configure Netbeans to use that
I have a Maven project which is cloned from Git. Project was successfully built and runs perfectly. However when i debug and try to evaluate functions/expressions, it gives me error saying --
expression must be compiled in the context of a Java Project's build path.
I read previous stack overflow answers and did the following (with no results)--
I added java nature to .project file and then added Java Project in source lookup. Still i get same error.
If i remove the Java project from source lookup and choose option --"Workspace folder" while adding Source lookup path, it gives me Null Pointer exception.
Can someone please tell me how to resolve this?
Try this !!!
Find the thread in your debug window that you are in the breakpoint for. Right click on it. Under relaunch should be an edit launch configuration selection. Select that.
Select Source tab. Add. Java Project. Select the java project that the code exists in.
I am trying to build WeatherApp, which comes from this tutorial, but I am seeing this error:
The specified task executable location "C:\Program Files (x86)\Java\jdk1.7.0_55\bin\javac.exe" is invalid.
and this warning (not sure if they are related):
Found conflicts between different versions of the same dependent assembly. In Visual Studio, double-click this warning (or select it and press Enter) to fix the conflicts; otherwise, add the following binding redirects to the "runtime" node in the application configuration file: <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"><dependentAssembly><assemblyIdentity name="System.Runtime" culture="neutral" publicKeyToken="b03f5f7f11d50a3a" /><bindingRedirect oldVersion="0.0.0.0-4.1.0.0" newVersion="4.1.0.0" /></dependentAssembly></assemblyBinding>
I can doube-click the warning to make it go away, but the error remains. I am not sure why the project is trying to use that version of the jdk, as I have changed my xamarin optioins to point at Program Files instead:
Why is Visual Studio trying to use that versioin of the JDK?
Sometimes there's a sdk.caches file that will hold an old reference. Please try to delete both your obj/bin folders and see if that resolves the issue. If it doesn't, turn up your Build Output verbosity and attach a Build Output Log to your post:
https://forums.xamarin.com/discussion/27515/how-to-obtain-diagnostic-build-logs (XS)
http://blogs.msdn.com/b/msbuild/archive/2005/09/29/475157.aspx (VS)
This question already has answers here:
Breakpoints in JRE System Library in Eclipse
(3 answers)
Closed 8 years ago.
I have set a break point inside the java.util.ReentrantLock code to understand the functionality in eclipse. However i am getting the following error
"Unable to install breakpoint in java.util.concurrent.locks.ReentrantLock" due to missing line number attributes. Modify compiler options to generate line number attributes.
How to proceed on this ?
Update the build path of the project to use a JDK instead of JRE.
JREs do not include debug information
Everything works fined, but suddenly eclipse stopped execute and junit tests or even main method, when i run them using run as - > Java application, run as -> junit test
It simply throws error
Caused by: java.lang.ClassNotFoundException: package.ClassName
whene ClassName - is class from where i trying to run method main.
It affect only one of my projects ... Different workspaces works fine, other project in same workspace works fine as well.
I'm sure if i recreate current project, error will gone. But the adjustments of this project in eclipse is really hard, so i want to avoid it.
Any clue?
The ClassName is not in the Class Path, if you start from console you should use -cp parameter , if from eclipse, please add ClassName to the sources of current(start) project.
Thanks to adarshr, I was able to look at the Problems window and determine that the build was failing because it could not find a class I had written.
I had used the MS TFS plugin to create a "shelveset" and it was supposed to have removed my pending changes in the process. However, this integration with the TFS snapin and Eclipse is obviously not well implemented, since the Eclipse project still thought the file existed and was complaining that it could not be compiled.
I went and manually deleted those "files" or "non-existing files" from the Eclipse project (that I thought I had removed with the shelveset action) and the problem was solved.
Also....
Another annoying things is that the Tomcat error I was getting by trying to debug within Eclipse was like this:
SEVERE: Error configuring application listener of class
com.CompanyName.ProjectName.servlet.StartupConfigListener
java.lang.ClassNotFoundException:
com.CompanyName.ProjectName.servlet.StartupConfigListener at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1643)
In reality, there was no problem at all with StartupConfigListener.java!! The build failed due to the OTHER problems I mentioned above, and therefore I guess this was the first class it attempted to load and failed.... because the entire project hadn't been able to compile perhaps?
(Here's to hoping my next project is using Visual Studio instead of Eclipse!)
Ok, I finally figured it out. The problem was with installed JRE in eclipse setting. I was playing around with this setting and changed installed JRE to JDK, and for some reason it broke the eclipse project.
You can also try going back to the basics. Check your command line and VM args. I've had this situation where a VM arg I was passing in was a path to a file that had a space in the path, and I had forgotten to include the full path in quotes. So e.g., if my arg looked something like
-DFILE=C:\Documents and Settings\myfile
...I'd get a java.lang.NoClassDefFoundError caused by a java.lang.ClassNotFoundException.