In Java, which method is used to start a thread's execution on a new call stack?

Introduction / Context:
Creating and starting threads correctly is foundational to Java concurrency. The main confusion is between start() and run().

Given Data / Assumptions:

• A thread has been created by extending Thread or by passing a Runnable to a Thread constructor.

Concept / Approach:
start() transitions a thread from New to Runnable so the JVM can schedule it. The JVM then calls run() on that new thread.

Step-by-Step Solution:

Verification / Alternative check:
Directly invoking run() executes synchronously on the current thread; only start() creates a new thread of execution.

Why Other Options Are Wrong:

• init() → applet lifecycle, not threads.
• run() → body of thread; does not start a new one when called directly.
• resume() → deprecated; not used to start threads.

Common Pitfalls:
Forgetting to call start() and expecting parallelism.

Final Answer:
start();