Java Tutorials

Section: Basic

Writing Javadoc examples

Java - Sort array

Java - How to sort a Map

Boundaries of primitive data types in Java

Performance of primitive data type vs object data type in Java

Java - How to get class name

The forgotten feature of Java switch

Java - When finally code block is executed

Java - Use of generic type

Java - ConcurrentModificationException: Not allow to add an entry in the collection while iterating through it

Java - Convert a list into an array of a specific class

Java - JEP 325 - new Switch Expressions

Java - Get a random number from a range

Section: Database

Using SQLite in Java

Java - Headache with ResultSet closed exception

Mapping of Java and MySQL data types

Section: Date and time

Java - Get the last day of the month

Java - How to get current date and time

Java - Format date to your locale settings

Java - Measure time elapsed, stopwatch

Java - New way to use date and time

Java - Add / Subtract date time

Section: Input / Output

Java - Read byte stream of partial file

Java - Append text to file

Java - Write text to file

Java - Why File.createTempFile() does physically create an empty file on the hard drive?

Java - Manipulate directory and file path in portable way

Java - List all files and ignore symbolic links

Java - Difference between getPath(), getAbsolutePath() and getCanonicalPath()

Java - List files from a directory

Java - How to create and read properties file

Java - Use ResourceBundle and properties files to add multilanguage support to your application

Java - Execute external command

Java - Print file size in human readable form

Java - Print Chinese from UTF-8 code

Executing external application from Java

How to capture and store console output, System.out.println()

Java - How to read user input or file input redirection

Java - io.File class uses less memory than io.InputStream

Section: Installation

Install JAVA 7

Debian - How to install Open JDK and Oracle JDK

Section: Math

Find the degree of a slope using Java

Find a linear function that represents a set of data points in Java

Section: String

Java - Remove all characters but letters and numbers using regular expression

Java - Format String

Java - Uses of regular expression in String.replaceAll()

Java - Convert an octal value to its corresponding ASCII value

Java - Get the differences between 2 strings

Section: Unit test

Eclipse - Install TestNG plugin

TestNG - Execution order of annotations

TestNG - Test an exception

TestNG - Run the same test method multiple times

TestNG - Unit test standard output, System.out.println

Using Hamcrest

Using Hamcrest with TestNG

TestNG - Test private method

TestNG - Run specific groups of tests

Section: Varia

Basic code to use Flywaydb programmatically

How to use Flywaydb programmatically: Breakdown step-by-step migrations

How to use Flywaydb programmatically: Use FlywayCallback

Get a list of holiday dates using Jollyday library

Basic xxHash example in Java

Java - Implement callback example

JCommander basic

Read and write Excel file using Apache POI

Java - Simple multithreaded programming

Pass variable/parameter to logback.xml

Simplest way to output "Hello world" using SLF4J

Java - Take screenshots of the full screen