What are the Java thread lifecycle states?

Can you explain the different states of a Java thread's lifecycle?

Sure! A Java thread can be in one of several states: NEW, RUNNABLE, BLOCKED, WAITING, TIMED_WAITING, and TERMINATED.

What does each state mean?

• NEW: The thread is created but not yet started.
• RUNNABLE: The thread is executing or ready to execute.
• BLOCKED: The thread is waiting for a monitor lock.
• WAITING: The thread is waiting indefinitely for another thread to perform a particular action.
• TIMED_WAITING: The thread is waiting for another thread to perform an action for a specified waiting time.
• TERMINATED: The thread has completed its execution.

How does a thread transition between these states?

Threads transition between states based on actions like starting, waiting for resources, or completing execution. For example, a thread goes from RUNNABLE to BLOCKED when it tries to access a synchronized block that another thread is holding.

Can you give an example of a real-world application using threads?

Certainly! A web server uses multiple threads to handle multiple client requests simultaneously, allowing it to serve many users at once.