Synchronization and concurrency before Java 5
Prior to Java 5, there were basically five means to correctly synchronize data between
threads ("shared" here means "accessed by multiple threads"):
For most programmers, the first two of these are probably the bread-and-butter
means of synchronizing data. I suspect that the last two or three on this list are unknown
to many otherwise experienced Java programmers. (The last is actually rare and
generally unrecommended, but we consider it for completeness.)
We'll review each of these methods briefly here, starting with
the synchronized keyword.
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Editorial page content written by Neil Coffey. Copyright © Javamex UK 2021. All rights reserved.