JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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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

Other Exception Handling Examples

Knowledge Centre
String Vs StringBuffer
We know that String is immutable object. We can not change the value of a String object once it is initiated. If we try to change the value of the existing String object then it creates new object rather than changing the value of the existing object. So incase, we are going to do more modificatios on String, then use StringBuffer. StringBuffer updates the existing objects value, rather creating new object.
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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.
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