java - Why Eclipse doesn't show local variables values when I debug class file from JDK? -

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i have following problem.

i want debug class files. example jdk.i downloaded sources , attached it.

public file[] listfiles(filenamefilter paramfilenamefilter)   {     string[] arrayofstring = list();//now here     if (arrayofstring == null) return null;     ....   }

then type f6 , move next line. after try watch arrayofstring value see next:

expression view:

is normal situation?

is there way debug ?

update1

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update2

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update 3

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the problem source/class files jdk compiled without debug information , therefore eclipse can't inspect these vars. see this answer more information.

to solve problem need different rt.jar or compile yourself


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