Hi Echo,
Eclipse EclEmma plugin ( http://www.eclemma.org/ ) is based on JaCoCo
library ( http://www.eclemma.org/jacoco/index.html ) that takes information
about lines from bytecode. And bytecode is generated by a Java compiler.
Decompilation of your class files by command "javap -v -p" shows that
"Hello.class" has following constructor and method and lines associated
with them (output of command was trimmed to leave only relevant
information):
public Hello();
LineNumberTable:
line 3
line 4
line 5
line 6
public void testGoto(int);
LineNumberTable:
line 10
line 11
line 12
line 13
line 15
and "HelloTest.class" has following constructor and method and lines
associated with them:
public HelloTest();
LineNumberTable:
line 1
public static void main(java.lang.String[]);
LineNumberTable:
line 4
line 5
>From there you can see that *compiler *:
- did not saved in bytecode numbers of lines with method names and
that's why they all are not highlighted
- line number of "public class HelloTest" has been saved as line of
implicitly generated constructor, which is never called, and that's why it
is highlighted as red
- there is no implicitly generated constructor in "public class Hello"
and that's why this line is not highlighted
- line number of "public Hello(){" has been saved as line of explicit
non-generated constructor, which is called, and that's why it is
highlighted as green
All in all - there is no any "phenomenon", EclEmma shows lines that are
saved in bytecode by compiler.
Regards,
Evgeny
On Saturday, November 25, 2017 at 9:05:32 AM UTC+1, Echo wrote:
>
> Hi Marc
> Case 1: "As the HelloTest is probably never instantiated this line is red".
> The line is red because HelloTest Class is never Instantiated. So why Hello
> Line doesn't have any color(red or green)?
> Case 2: All the constructor function is green or red. But the
> normal function line doesn't have any color.
> About the version: I use both eclipse(eclemma) and ant to check
> the phenomenon. The corresponding file are in the attachment.
>
>
> 在 2017年11月24日星期五 UTC+8下午11:13:43，Marc R. Hoffmann写道：
>>
>> Hi Echo,
>>
>> Case 1: This is the implicit default constructor added by the Java
>> compiler. As the HelloTest is probably never instantiated this line is red.
>>
>> Case 2: I don't have an explanation here. What exact compiler version are
>> you using (Eclipse)? Can you please provide the corresponding class file
>> for further analysis?
>>
>> Regards,
>> -marc
>>
>>
>>
>>
>>
>>
>>
>> On 2017-11-24 08:20, Echo wrote:
>>
>> Hi, All. When i use jacoco to run the code, the report seems
>> incorrect and makes me confused.
>> 1. About the class name line.
>> As you can see in the picture, the first line in HelloTest is red and the
>> first line in the Hello isn't red. But both classes have been executed.
>> 2.About the method name line.
>> In Hello class, line 3 is green while line 9 doesn't have any color. Is
>> it because line 3 is INIT Method.
>>
>>
>> <https://lh3.googleusercontent.com/-9Dh5VZNWKgs/WhfHwkpZ9XI/AAAAAAAAACY/3ItVsoL5HWQCzRwJH0vMV14G7g9OhIRuQCLcBGAs/s1600/F5%25253D7%257B2PZQ%257EZ6UCX62ZA5I.png>
>>
>>
>> <https://lh3.googleusercontent.com/-sqqNXxGAYUo/WhfH0QN41bI/AAAAAAAAACc/TKGQxoqS4gc0xi6-y5BMua1hRGUJsstfACLcBGAs/s1600/5DKEW%255BG%2540J%257EZ%2540NDKSU%2540%2528N_PD.png>
>>
>>
>> Regrads
>> Echo
>>
>>
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