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why does method get called twice though it is called only once?

 
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here first superclass constructor is called then it invoked method of subclass then again subclass constructor is called then why again the method is called though i didnt call the method in subclass constructor???

i expected the output to be
A1
null0falsename age and values are printed
Checking
but the output is A1
null0falsename age and values are printed
Checking
abc12truename age and values are printed

 
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because of at line 22
 
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when you write


then constructor of subclass is called which call constructor of super class i.e A1() which prints

then this constructor call show method which prints



after super class constructor completes subclass constructor i.e(class Checking ) constructor runs and prints


After completing subclass constructor you call method show() which prints
 
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