Granny's Programming Pearls
"inside of every large program is a small program struggling to get out"
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Java pass by reference

 
Greenhorn
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//result s=aaa sb=bbbaaabbb
i=5 j=7
null

Why the StringBuilder sb change the value?
 
Rancher
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See the code in this post.
 
Rancher
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Why the StringBuilder sb change the value?



Because sb is pointing to a mutable object. I hope you know why the variable s prints the same value.

[ Edit - I'd suggest to read the entire thread E Armitage is referring to. ]
 
It is sorta covered in the JavaRanch Style Guide.
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