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why this is happening while compiling this code

 
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Dharmendra Ramanujan
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Exception in thread "Thread-0" java.lang.NullPointerException
at ChicksYack.run(ChicksYack.java:20)
at java.lang.Thread.run(Thread.java:619)
Exception in thread "Thread-1" java.lang.NullPointerException
at ChicksYack.run(ChicksYack.java:20)
at java.lang.Thread.run(Thread.java:619)


Why this is producing NullPoiterException confused
 
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Please QuoteYourSources
 
Rancher
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How many instances of ChicksYack do you create ?
In how many of those instances do you initialise the c variable ?
In how many of those instances do you dereference (call a method on) the c variable ?
 
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