Which method must be overridden when implementing the Runnable interface?

Java MCQ: Which method must be overridden when implementing the Runnable interface?

Answer:

Explanation:

When implementing the Runnable interface in Java, you must override the run() method. The run() method contains the code that defines the task to be executed by the thread. The Runnable interface is part of the java.lang package and is a functional interface with a single abstract method: run().

Here’s an example of implementing the Runnable interface:

public class MyRunnable implements Runnable {
    @Override
    public void run() {
        System.out.println("Thread is running");
    }

    public static void main(String[] args) {
        MyRunnable myRunnable = new MyRunnable();
        Thread thread = new Thread(myRunnable);
        thread.start();
    }
}

In this example, the MyRunnable class implements the Runnable interface and overrides the run() method to print a message. A new Thread object is created with myRunnable as its target, and the thread is started using the start() method, which in turn invokes the run() method.

Using the Runnable interface is a common approach in Java for defining tasks that can be executed by threads. It provides flexibility by allowing the task to be separated from the thread itself, enabling the same task to be executed by different threads.

Reference links:

https://www.rameshfadatare.com/learn-java-programming/
https://www.javaguides.net/p/java-tutorial-learn-java-programming.html