Threadlocal

ThreadLocal is a class in Java that is used to create thread-local variables. These variables are stored separately for each thread and can only be accessed by that thread. This means that changes made to the variable by one thread do not affect the value of the variable in other threads.

ThreadLocal is often used in multi-threaded applications where multiple threads access the same object or resource. By using ThreadLocal, each thread can have its own copy of the object or resource, which avoids conflicts and synchronization issues.

To use ThreadLocal, you create an instance of the class and then call its methods to set and get the thread-local value. For example, to create a thread-local variable of type Integer, you would do the following:

ThreadLocal<Integer> myThreadLocal = new ThreadLocal<Integer>();

// Set the thread-local value for the current thread
myThreadLocal.set(42);

// Get the thread-local value for the current thread
Integer myValue = myThreadLocal.get();

In this example, each thread would have its own copy of the Integer value, and changes made to the value by one thread would not affect the value in other threads.