Default Methods for Interfaces in Java8
This example-driven tutorial outlines the usage of default methods for an interface in Java8. The Java Tutorials have been written for JDK 8.
Java Method Chaining with Example
The term method chaining refers to both a design and a convention. Each method returns an object, allowing the calls to be chained together in a single statemen...
Popular Java Object Mapping Frameworks
Applications often consist of similar but different object models, where the data in two models may be similar but the structure and concerns of the models are ...
How GCeasy and FastThread are compared to JVisualVM?
A potential customer asked us this question: “How GCEasy & FastThread are compared to JVisualVM?”. As it was a great question, here was our answer:
1. Intel...
10 Micro Metrics for Your Performance Reports
In a lot of enterprises, performance tests are conducted regularly. As part of these tests, QA team gathers various metrics and publishes them in a performance ...
Understanding the Garbage Collection Logs in Android Applications
Memory utilisation on the mobile app has a significant impact on the customer experience. If your app creates a lot of objects, then Android Run Time (ART) envi...
Real Time Is Greater than User and Sys Time
Time taken by every single GC event is reported in the GC log. In every GC event, there are ‘user’, ‘sys’, and ‘real’ time. What does these time mean? What is t...
Rotating Garbage Collection Log Files
You can debate about which approach you want to take for rotating GC log files, but don’t debate about whether to rotate the GC log files or not.
Java String Examples
1. String Length and Trim
Code snippet explains the usage of String class length and trim() method.
The length() method returns the length of this string.
The ...
7 Options to Capture Thread Dumps for Analysing Memory Problems
Thread dumps are vital artifacts to diagnose CPU spikes, deadlocks, memory problems, unresponsive applications, poor response times and other system problems. T...
How to Generate Gravtar Image Url from Email in Java
The following code snippet shows how to generate Gravatar URLs from email address. This utility method alows you to pass the size of your email.
How to Generate Unique File Name When Saving a File in Java
The following code snippet shows how to get unique file name when saving file in java. It first checks if already a file exist with the specified name, then it ...
How to Calculate Image Dimensions in Java
The following code snippet shows how to calculate image dimension in java by reading the file from specified path.
Frequently Asked Questions on Java Memory, JVM and Garbage Collection
Currently there are are 4 GC algorithms available in the Java Hotspot VM. They are The Serial GC, The Parallel GC, CMS and The G1.
Linear / Sequential Search Example in Java
Quick Java code snippet to show Linear / Sequential Search.