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Answer Posted / b.chandra sai mohan
After the compilation process, we will get a class file.
Before installing the class file in the device, JVM verifies
whether the class file is structurally or conceptually
correct according to J2me specification.If the class file
fails this check it is rejectd.This is "PREVERIFY" step.This
is performed by very small tiny JVM in mobile also.So,
verifying a classfile in a mobile is a risky job becoz of
memory and resource constriants. So, we have to do
preverification off the device. We will have a preverify.exe
file which we will keep in bin folder of WTK22. If we .class
file input to this tool we will get preverified class file.
Some extra information is added to class file specifying
that is preverfied. When we install it in device the device
sees this information and the proceeds. Otherwise it
rejects. In this we can reduce overhead on device by
preverifying our class file off device.
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