[Florian Fischer]

Hello,

I have been fighting with this one for ages. Sometimes it works, sometimes not. I haven’t been able to find out why. I have a project A that is deployed as a JAR and a project B that uses the JAR. I cannot properly zoom (F3) into the library source.

I will post this as a bug report. Maybe I am doing something wrong, in that case, I hope someone can tell me what. In short, the problem is that when I use F3 to open a class in my library or if I click on a stack trace, it open the .java source but the tab says “.class” and is read-only.

Any help is appreciated.

——————————
Steps to reproduce the problem:

– download and install MyEclipse 9.0 M2
– open MyEclipse in a new workspace

– create a new Java project AlphaProject
– create a new Java class (root package)

public class Alpha {
public static void main(String[] args) {
System.out.println(“Hello, World!”);
throw new RuntimeException(“oops!”);
}
}

– export to a JAR file:
. – click File > Export…
. – select Java > JAR File
. – click Next>
. – check AlphaProject
. – select “C:\AlphaLib.jar” as destination (or in any other place)
. – click Finish

– create a new Java project BetaProject
– in project properties, Java Build Path, Libraries
. – add external JAR “C:\AlphaLib.jar”
. – set its source attachment to “/AlphaProject/src”
. – OK

– In BetaProject, create a new class

public class Beta {
public static void main(String[] args) {
Alpha.main(args);
}
}

– Move your cursor to “main” in “Alpha.main(args)” and press F3

=> The file opens under a tab “Alpha.class” and not “Alpha.java”. It is readonly.

– close all files
– run Beta.java. It causes an exception

Exception in thread “main” java.lang.RuntimeException: oops!
at Alpha.main(Alpha.java:5)
at Beta.main(Beta.java:4)
Hello, World!

– click on (Alpha.java:5) to zoom into the source

=> Again, the file opens under a tab “Alpha.class” and not “Alpha.java”. It is readonly.

——————————
What I get:
In both cases, MyEclipse opens a tab labeled “Alpha.class” that displays Alpha.java in read-only.

What I expect:
I expected to open Alpha.java in the project specified in the source attachment and be able to modify it.

[support-joy]

florianfj,

This is not an issue. If you use F3 to open a class in a library, it opens .class file only and you cannot edit a file which is in a jar file in MyEclipse.

Please follow below step if you wish to edit this file –
1. Create Alpha project with a java class in the root package
2. Now create Beta Project and Goto Buildpath > configure BuildPath > Projects Tab > Add > Select Alpha project and click Finish
3. Now create a class within root package and add the source code
4. Now when You press (F3), it takes you to .java file where you can edit the .java file.

[Author]

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