Easy learning with example program codes

shutdown hook in java

Java shutdown hook is used to perform some operation when JVM is shutting down. It is mainly used to perform clean-up operations like closing log file etc. JVM shutdown when user presses ctrl+c on the command prompt or System.exit(0) method is called or user logoff or user shutdown etc.

The Runtime.getRuntime().addShutdownHook(Thread) method is used to register the thread with the Virtual Machine.


public class ShutdownHookTest {
  public static void main(String[] args) {
	  Runtime runtime=Runtime.getRuntime();  
	  runtime.addShutdownHook(new TestThread());  
	  System.out.println("Main sleeping.");  
	  System.out.println("Press ctrl+c to exit.");
	  try{Thread.sleep(2000);}catch (Exception e) {}  
class TestThread extends Thread{  
    public void run(){  
        System.out.println("Shut down hook job finished.");  


Main sleeping.
Press ctrl+c to exit.
Shut down hook job finished.

Related topics

Posted in Java   

Core Java Tutorial

Programming language overview.
Overview of Java.
Java features
JVM architecture details.
Java Coding Guidelines.
Some important definitions.
Variable and data types.
Hello world java program.
Core java examples programs.
Important Java Programs.
How to set permanent path in java?
OOPs Basics.
Object and Class in Java.
OOPs Principles/Concepts.
Abstraction in java.
Encapsulation in java.
Polymorphism in java.
Method overloading in java.
Method overriding in java.
Dynamic method dispatch.
Runtime polymorphism.
Association in java.
Inheritance in java.
Aggregation in java.
Command line arguments in java.
Command line argument program in eclipse.
Read input from command line using Scanner.
Java array programs
Java star pattern programs
Java number pattern programs
final in java.
Abstract class in java.
Interface in java.
Custom marker Interface in java.
Constructor in java.
Package in java.
Access modifier in java.
Static import in java.
Package class in java.
this in java.
Instance initialize block.
Anonymous block.
super in java.
Static in java.
final in java.
Java cloning deep and shallow
Shallow vs Clone copy
String handling in java.
String handling programs.
StringBuffer in java.
StringBuilder in java.
Exception Handling Tutorial.
Multithreading Tutoial.
Java input output stream tutorial.
Collections framework in java tutorial.
Collections framework programs.
Java Random class
Java annotations.
Java design principles.
Java 7 features
Java 8 features
Java networking tutorial
Java Reflection tutorial
Sign Up/ Sign In
Ask a Question

Industrial Training

We offers Placement Oriented Training on Java, Spring, JSF, Hibernate, PHP, AngularJS, Angular 4, PLSQL, Oracle BI Publisher etc. We also provides Online training, please mail us at


We also provides the Development services for Website Development , Java Development, PHP Development, Android App Development etc. You can contact us on

Copyright © 2018 CodesJava Protection Status SiteMap Reference: Java Wiki