If you have come across code which does this- We could discuss it. Basically its used to avoid extra evaluations in Boolean expressions.
And as mentioned earlier- A meaningful subject line would draw the attention of other members and would help you in getting your query answered at the earliest.
I wasn't sure what you meant by "short-circuiting"; you mean the short-circuit operators.
In the case of && and ||, you can sometimes tell the value of the entire expression by evaluating its left half, so false && ... always evaluates to false, and true || ... always evaluates to true. So the JVM only evaluates the left half of the whole expression in those cases.
In the case of true && ... or false || ..., the JVM must evaluate the right half as well.