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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doGet() method is used to get information, while doPost() method is used for posting information. doGet() requests can't send large amount of information and is limited to 240-255 characters. However, doPost()requests passes all of its data, of unlimited length. A doGet() request is appended to the request URL in a query string and this allows the exchange is visible to the client, whereas a doPost() request passes directly over the socket connection as part of its HTTP request body and the exchange are invisible to the client.

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Java Finally Block Examples

Finally Block Sample Code

Example Output

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