Page 164 - CTS - CSA TP - Volume 2

COMPUTER SOFTWARE APPLICATION - CITS

Output:

3 isAlive() Method:
• Purpose: Tests if a thread is alive.

• Syntax:isAlive()
• Return Type:boolean
• Use Case:
• Allows you to check if a thread has been started and has not yet completed its execution.
• Useful when you want to perform actions in the main thread after ensuring that another thread has finished.

class IsAliveExample extends Thread {
public void run() {
System.out.println(“Thread is running...”);
}

public static void main(String args[]) throws InterruptedException {
IsAliveExample isAliveThread = new IsAliveExample();
isAliveThread.start();
System.out.println(“Is thread alive? “ + isAliveThread.isAlive());
}
}

Explanation:
1 IsAliveExample Class:
• This class extends the Thread class, indicating that instances of this class can be executed as separate
threads.
2 run() Method:
• The run() method overrides the run() method of the Thread class, defining the behavior of the thread when it
starts.

• Inside the run() method, it prints “Thread is running...” to indicate that the thread has started its execution.
3. main() Method:
• This method serves as the entry point of the program.
• Inside main():

• An instance of the IsAliveExample class named isAliveThread is created.
• The start() method is invoked on isAliveThread to begin the execution of the thread.
• Immediately after starting the thread, isAlive() method is called on isAliveThread to check if the thread is alive.
• The result of isAlive() method (which returns true if the thread is alive and false otherwise) is printed.

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CITS : IT & ITES - Computer Software Application - Exercise 104 CITS : IT & ITES - Computer Software Application - Exercise 104