Source code for java

Free Java Source Code, Class Libraries, Applets, Beans and Frameworks

This page lists free Java class libraries, free Java source code, free Java applets and the like, to make your programming task easier (simply reuse code that have already been tested to do a commonly done task). Other Java pages on this site that you may be interested in include:

Looking for a Java book? One frequently recommended book on Java is Java in a Nutshell. I use the first edition of this book myself to learn Java and have found it most usable. The later editions include support for later versions of Java, as well as extended the explanations to make it easier for non-C programmers to understand the book (the first two editions targeted C programmers).

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Free Java Libraries and Source Code

As is obvious from the name, this is a Java port of the GNU getopt() command line parser.

ObjectDB for Java/JDO is an Object Database Management System (ODBMS) written in Java. It is JDO compliant (Java Data Objects), allows your application to query the database using JDO Query (JDOQL), allows you to have up to 5,000 Java objects per database, uses a single file database, etc. The free edition may only be used for personal, non-commercial purposes.

To quote, «the Cyrus SASL library is a generic library for SASL authentication, as used in SMTP and IMAP protocols. It’s used for authentication by the Cyrus IMAP server as well as the Sendmail 8.10 release.» It also includes a Java SASL library. Note that the link above is to an FTP directory. Look for a file like «cyrus-sasl-1.5.20.tar.gz» (the numbers may change when newer versions are released).

This is a free replacement for Sun’s proprietary class libraries. It is still currently under development. The intention is for the released version to be fully compatibile with Java 1.1 and mostly compatible with 1.2.

OpenMap — Open Systems Mapping Technology

[Update: this software is no longer available.] OpenMap is an open source JavaBeans toolkit that allows you to «build applications and applets that access data from legacy databases and applications» (quoted from their website). Note that you should read their licence agreement before you blindly use the package, since it is not one of the standard open source licences. (At the time I looked at it, I got the impression that if you make a derivative work from their toolkit, you are also giving them the permission to make a derivative work from your program. But it’s best you read the licence agreement yourself.)

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Copyright © 1999-2018 by Christopher Heng. All rights reserved.
thesitewizard™, thefreecountry™ and HowToHaven™ are trademarks of Christopher Heng.
This page was last updated on 23 March 2018.

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Free Java Guide

An assortment of programming examples covering many different topics. Many searchable collection of source code snippets illustrating specific tasks best coding practices. With our programming samples you will be able to add your own functionality to the already existing sample. All the examples are made available here for you to copy and paste into your programs.

Free Java Source Code Links

1. Core Java Programs [PAGE 1]

Core Java Programs [ PAGE 1]

Some Java programs which help lot of java beginners to understand the basic fundamentals in Java programming.

//Find Maximum of 2 nos.

public static void main(String args[])

//taking value as command line argument.

//Converting String format to Integer value

int i = Integer.parseInt(args[0]);

int j = Integer.parseInt(args[1]);

System.out.println(i+» is greater than «+j);

System.out.println(j+» is greater than «+i);

//Find Minimum of 2 nos. using conditional operator

public static void main(String args[])

//taking value as command line argument.

//Converting String format to Integer value

int i = Integer.parseInt(args[0]);

int j = Integer.parseInt(args[1]);

System.out.println(result+» is a minimum value»);

/* Write a program that will read a float type value from the keyboard and print the following output.

->Small Integer not less than the number.

->Largest Integer not greater than the number.

public static void main(String args[])

double i = 34.32; //given number

System.out.println(«Small Integer not greater than the number : «+Math.ceil(i));

System.out.println(«Given Number : «+i);

System.out.println(«Largest Integer not greater than the number : «+Math.floor(i));

/*Write a program to generate 5 Random nos. between 1 to 100, and it

should not follow with decimal point.

public static void main(String args[])

/* Write a program to display a greet message according to

Marks obtained by student.

public static void main(String args[])

int marks = Integer.parseInt(args[0]); //take marks as command line argument.

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Source Code for ‘Java 17 for Absolute Beginners’ by Iuliana Cosmina

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Apress/java-17-for-absolute-beginners

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README.adoc

This repository accompanies book Java for Absolute Beginners (https://link.springer.com/book/10.1007/978-1-4842-7080-6) by Iuliana Cosmina(Apress, 2018).

Download the files as a zip using the green button, or clone the repository to your machine using Git.

Release v2.0 corresponds to the code in the second edition of the published book, without corrections or updates. This project was built successfully with JDK versions 17 and Maven version 3.8.2. The syntax is specific to Java versions up to and including 17. (Unstable(preview) features have not been covered in the book)

For corrections to the content in the published book, see the file Errata.adoc.

See the file Contributing.adoc for more information on how you can contribute to this repository.

This is a Maven multi-module project. Build it from scratch using:

Build it without tests using:

mvn clean install -DskipTests

The default Maven goal is set to:

This allows you to build the project and generate the site for it just by running mvn , at the root of the project.

If you want to generate and run the project site run

mvn clean install site site:stage site:run -Pdocs

This project does not require installing Apache Maven, because it was configured to be run with an Apache Maven Wrapper. All previous commands can be run with ./mvnw instead of mvn .

The docs maven profile excludes a few modules from generating docs, because of failures caused by non-modular dependencies and plugin incompatibilities.

If you want to build the project using a Docker container, a Dockerfile is provided to you. Just build the image using the following command (the 5th step is Maven build):

If you want to inspect the image contents, run the container image using:

docker run -it -p 9000:9000 --name java-17-bgn-build -v $:/usr/src/java-17-for-absolute-beginners java-17-bgn

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Source code for «Java: The Complete Reference, Eleventh Edition» by Herbert Schildt

gnodivad/java-the-complete-reference

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README.md

Java: The Complete Reference, Eleventh Edition

This repo consist code example for the book.

Chapter	Title	Completed
01	The History and Evolution of Java
02	An Overview of Java	✅
03	Data Types, Variables, and Arrays	✅
04	Operators	✅
05	Control Statements	✅
06	Introducing Classes	✅
07	A Close Look at Methods and Classes	✅
08	Inheritance	✅
09	Packages and Interfaces	✅
10	Exception Handling
11	Multithreaded Programming
12	Enumerations, Autoboxing, and Annotations
13	Try-with-Resources, and Other Topics
14	Generics
15	Lambda Expressions	✅
16	Modules
17	String Handling	✅
18	Exploring java.lang	✅
19	java.util Part 1: The Collections Framework	✅
20	java.util Part 2: More Utility Classes	✅
21	Input/Output: Exploring java.io
22	Exploring NIO
23	Networking
24	Event Handling
25	Introducing the AWT: Working with Windows, Graphics, and Text
26	Using AWT Controls, Layout Managers, and Menus
27	Images
28	The Concurrency Utilities
29	The Stream API
30	Regular Expressions and Other Packages
31	Introducing Swing
32	Exploring Swing
33	Introducing Swing Menus
34	Java Beans
35	Introducing Servlets

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Source code for «Java: The Complete Reference, Eleventh Edition» by Herbert Schildt

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