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Java
52 posts
Find some of the high quality Java tutorials and examples on core java, J2ME, blackberry and design patterns.
Proliferation Caused by Java Unified GC Logging
As most of you knew, GC logging is not standardized. GC log format varies by JVM vendor (Oracle,…
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…
Popular Java Object Mapping Frameworks
Applications often consist of similar but different object models, where the data in two models may be similar…
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…
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…
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…
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…
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…
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…
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 appends a number to end.
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.
Insertion sort example in Java
Code snippet to sort array using insertion sort algorithm in java.
Sort Array ascending or descending using comparator in Java
Quick Java code snippet to sort Array ascending or descending using comparator in Java.
Linear / Sequential Search Example in Java
Quick Java code snippet to show Linear / Sequential Search.
Stepping Into My First Java Program “Hello World!”
Before begin writing your first Java program, you need to have your development environment ready. For writing and…
Count line word and characters in file
In this example we’ll see how to count line, word and characters in file. package com.javatechig; import java.io.BufferedReader;…
