Donate to Charity

If you like my works and tutorials on “mkyong.com”, please consider making a donation of $10 or whatever you can to protect and sustain the following charities :

Date: 2019-08-17 View: 1819

You have been told a lot that you can’t manage memory in Java. Well, it has changed since HotSpot release of the Java VM. There is a way to directly allocate and deallocate memory as well as write and read it… Of course we are talking about the JVM memory where the Java program runs. In this tutorial we are going to show you codes that deal with this topic.

Date: 2019-08-17 View: 1139

This example shows you how to get the HTTP request headers in Java. To get the HTTP request headers, you need this class HttpServletRequest :

Date: 2019-08-17 View: 1698

Java Check if web request is from Google crawler

If a web request is coming from Google crawler or Google bot, the requested “user agent” should look similar like this :

Date: 2019-08-17 View: 1357

Eclipse IDE prompts warning on new DefaultHttpClient, mark this class as deprecated.

Date: 2019-08-17 View: 1624

Review the “maven-emma-plugin” in pom.xml :

Date: 2019-08-17 View: 1764

Creating a Maven site, but the build is very slow to generate the dependency report.

Date: 2019-08-17 View: 1714

Maven + Emma code coverage example

Emma is a free Java code coverage tool. In this tutorial, we will show you how to use Maven to generate the Emma code coverage report for your project, and also how to integrate the Emma report into the Maven project site.

Date: 2019-08-17 View: 1882

MongoDB Aggregate and Group example

In this tutorial, we will show you how to use MongoDB aggregate function to group documents (data).

Date: 2019-08-17 View: 1397

Spring 3.2.x + Hibernate 4.3.x integration, hits JtaPlatform ClassNotFoundException, search the project classpath, find out that JtaPlatform is at different package?

Date: 2019-08-17 View: 1815

Spring Security + Hibernate XML Example

In this tutorial, we will show you how to integrate Hibernate 4 in Spring Security, XML configuration example.

Date: 2019-08-17 View: 1506

log4j.xml Example

Here’s an XML version of log4j properties file, just for sharing.

Date: 2019-08-17 View: 1352

Deployed a Debian 7.5 on Linode server, the default is using OpenJDK 1.6. How to upgrade to OpenJDK 1.7?

Date: 2019-08-17 View: 1358

Normally, you use Secure copy or SCP to download a file from another server via SSH connection. For example,

Date: 2019-08-17 View: 1434

Log4j hello world example

In this tutorial, we will show you how to use the classic log4j 1.2.x to log a debug or error message in a Java application.

Date: 2019-08-17 View: 1462