JAVA EXAMPLE PROGRAMS

Java Finally Block Examples

The finally block always executes immediately after try-catch block exits.
The finally block is executed incase even if an unexpected exception occurs.
The main usage of finally block is to do clean up job. Keeping cleanup code in a finally block is always a good practice, even when no exceptions are occured.
The runtime system always executes the code within the finally block regardless of what happens in the try block. So it is the ideal place to keep cleanup code.

Finally Block Sample Code

Code:

package com.myjava.exceptions;

public class MyFinallyBlock {
    public static void main(String[] a){
        /**
         * Exception will occur here, after catch block
         * the contol will goto finally block. 
         */
        try{
            int i = 10/0;
        } catch(Exception ex){
            System.out.println("Inside 1st catch Block");
        } finally {
            System.out.println("Inside 1st finally block");
        }
        /**
         * In this case exception won't, after executing try block
         * the contol will goto finally block. 
         */
        try{
            int i = 10/10;
        } catch(Exception ex){
            System.out.println("Inside 2nd catch Block");
        } finally {
            System.out.println("Inside 2nd finally block");
        }
    }
}

Example Output

Inside 1st catch Block
Inside 1st finally block
Inside 2nd finally block

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Knowledge Centre

Can interface be final?

No. We can not instantiate interfaces, so in order to make interfaces useful we must create subclasses. The final keyword makes a class unable to be extended.

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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.