What does it mean for a method to be thread-safe?

What makes a method thread-safe?

If a method (instance or static) only references variables scoped within that method then it is thread safe because each thread has its own stack: In this instance, multiple threads could call ThreadSafeMethod concurrently without issue.

What is thread-safe with example?

5) Example of thread-safe class in Java: Vector, Hashtable, ConcurrentHashMap, String, etc. 6) Atomic operations in Java are thread-safe like reading a 32-bit int from memory because it's an atomic operation it can't interleave with other threads.

How do you know if thread-safe?

To test if the combination of two methods, a and b, is thread-safe, call them from two different threads. Put the complete test in a while loop iterating over all thread interleavings with the help from the class AllInterleavings from vmlens. Test if the result is either an after b or b after a.

What does thread-safe mean in Java?

When multiple threads are working on the same data, and the value of our data is changing, that scenario is not thread-safe and we will get inconsistent results. When a thread is already working on an object and preventing another thread on working on the same object, this process is called Thread-Safety.