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Cyclic class

 
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i found this code in some site.
pls explain what happen
 
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Well the answer is in the behaviour of Classloader/Intilization.
JLS: A class/interface is initialized when either its static variable/method is called for the first time, in the above case when the C is used in the main method the initilizer tries to initilize the C it reaches line int C= which uses interfaceA so it will try to initilize A when it reaches A= it uses B= so it initilize B it reaches B= which uses C again as C is in mid of initilization if a variable is used in mid of initilization the default value is returned its similar to using a variable of a subclass in super class constructor. Hence the the value returned for int B= 0 + 1 and rest is calcuated, but when the control comes to the main method the interfaceC is fully intilized it can now get value of C.
Hope this answered your question.
 
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