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Why runtime exception thrown is this code

 
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The following code throws RuntimeException and i am not able to figure out the cause of it.
kindly help me.
Here's the code
 
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You do



but classC was not initialized and has therefore the default value null. This gives a NullPointerException. You have to create a ClassC object at some point.

John
 
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Hi Divyya,
In ClassB you have declared but not instantiated ClassC .To refer to ClassC you have to either create an instance of the class or make the ClassC method static .If you choose to make the getValue() method static you will require to make the String variable value static too .
 
Divyya Joshi
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Thanks John and MeherDad
 
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