J2EE - What is the difference between transient variable, volatile variable

[preethisingh]

What is the difference between transient variable, volatile variable <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

[Gemsbond]

volatile modifier requests the Java VM to always access the shared copy of the variable so the its most current value is always read. If two or more threads access a member variable, AND one or more threads might change that variable's value, AND ALL of the threads do not use synchronization (methods or blocks) to read and/or write the value, then that member variable must be declared volatile to ensure all threads see the changed value.when you don't want to serialize a member variable then you define that variable as transient.