Java Program to use Finally Block for Catching Exceptions

A block is one of the most helpful industry practices in the IT field. During the development cycle of the IT project, there will be a need to create and maintain some necessary code. These essential lines of code have to be put in the try block to label them as clean code, for instance, the closing of the file in the developed project or closing the established connection.

Finally, the block is broadly used in three cases, and they are discussed below with relevant code in the java programming language.

Case 1: When an Exception doesn't Rise

Java Code

// here, we are writing down the java programming language to demonstrate the
// use of concept Java Program to Use finally block for Catching Exceptions
// with easy-to-understand example code in java with their outputs
import java.io.*;

class JTP {
	public static void main(String[] args)
	{
		try {
			System.out.println("hey! coder we are inside the try block now");
			
			// the below code snippet will not throw us any sort of 
			//exception
			System.out.println(84 / 2);
		}
		
		// in the below case java code snippet, we are writing down the 
		//execution of the program will not take place
		catch (ArithmeticException e) {
			
			System.out.println("hey coder it is an arithmetic exception");
			
		}
		// in the below case java code snippet, we are writing down the 
		//execution of the program will be executed always
		finally {
			
			System.out.println(
				"hey coder, finally: i executed always has taken place !");
			
		}
	}
}

Output:

java -cp / tmp /pk kY 1yo G xa  JTP
hey! Coder, we are inside the try block now
42
Hey, code,r finally: i executed consistently has taken place!

Case 2: When the Exception Rises and is Handled by the Catch Block

Java Code

// here, we are writing down the java programming language to demonstrate 
//the case where the exception has been raised, and it is handled by catch
// use of concept Java Program to Use finally block for Catching Exceptions
// with easy-to-understand example code in java with their outputs


import java.io.*;

class JTP {
	
	public static void main(String[] args)
	{
		try {
			System.out.println("hey! coder we are inside the try block now");

			// the below code snippet will throw us the arithmetic  
			//exception

			System.out.println(84 / 0);
		}


		// the below code snippet will catch the arithmetic  
			//exception that is raised
		catch (ArithmeticException e) {

			System.out.println(
				"hey, coder, the catch: exception has been handled.");
		}

		// in the below case java code snippet, we are writing down the 
		//execution of the program will be executed always

		finally {
			
		System.out.println("hey coder, finally : i executed always has taken place !");
		}
	}
}

Output:

java -cp  /tmp /pk kY 1y oG X a JTP
hey! Coder, we are inside the try block now
hey, coder, the catch: exception has been handled.
Hey coder, finally: i executed consistently has taken place!

Case 3: When Exception Rise and are not Handled by the Catch Block

Java Code

// here, we are writing down the java programming language to demonstrate 
//the case where the exception has been raised, and it is handled by catch
// use of concept Java Program to Use finally block for Catching Exceptions
// with easy-to-understand example code in java with their outputs

import java.io.*;

class JTP {
	public static void main(String[] args)
	{
		try {
			System.out.println("hey! coder we are inside the try block now");

			// the below code snippet will throw us the arithmetic  
			//exception

			System.out.println(84 / 0);
		}

		
		// the below code snippet will not accept and catch the arithmetic  
		//exception that is raised it is entitled only to accept the NULL
		//pointer exception

		catch (NullPointerException e) {

			System.out.println(
				"hey, coder, the catch: exception has not been handled.");
		}

		// in the below case java code snippet, we are writing down the 
		//execution of the program will be executed always

		finally {

			System.out.println(
				"hey coder, finally: i executed always has taken place !");
		}
		//the below small code we have written for testing purposes will not 
		//be executed anymore
		System.out.println("hey coder, I want to run the thread mill!");
	}
}

Output:

java -cp  /tm p/pkkY 1yo GXa JTP
hey! Coder, we are inside the try block nowhere coder, finally: i executed always has taken place!
Exception in thread "main" java. Lang.ArithmeticException: / by zero at JTP.main(JTP.java:17)

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