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SOS: i have some questions about Thread

kevin saber
Greenhorn

Joined: Mar 07, 2010
Posts: 21


this will cause NullPointerException when i run it, but i don't understand why...
Ankit Garg
Sheriff

Joined: Aug 03, 2008
Posts: 9321
    
  17

In the go method, the two Test5 objects with which you create 2 threads both have Chicks as null, so calling yack in the run method causes NPE. Try this


SCJP 6 | SCWCD 5 | Javaranch SCJP FAQ | SCWCD Links
kevin saber
Greenhorn

Joined: Mar 07, 2010
Posts: 21
oh~~ i would have simply thought that c have pointed to an object by mistake as line 9 showed.
thank you!!!
 
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subject: SOS: i have some questions about Thread