14
votes
What library should I use for handling CLI arguments for my Java program?
picocli is different from other Java CLI libraries:
It is designed to be included in source form. This lets users run picocli-based applications without requiring picocli as an external dependency.
...
- 271
8
votes
Free for commercial use Java library to convert HTML to PDF
You have a few options:
openhtmltopdf - new code, still brewing, but has some great results
Apache FOP - can convert XML, not HTML, but might be usefull
itext the older version (version 2)
...
- 181
7
votes
Accepted
WebP library for Java?
TwelveMonkeys ImageIO now has full ImageIO read support for WebP (lossy, lossless and lossy + lossless alpha) modes.
Another free option is the ImageIO plugin from Java VP8 Decoder. It contains a ...
- 236
5
votes
Standalone JUnit XML report viewer
I wanted the same thing for YEARS, I finally found the time to make what I needed and it can be found here: https://github.com/inorton/junit2html
It generates full a full detailed single HTML page ...
- 151
5
votes
Java library that diffs JSON and generates what was added/deleted/modified?
I did some research to finalise a diff generation library for myself.
The bug pointed out by @pacoverflow seems resolved. I did not face this issue.
My vote is for fge json-patch because of following ...
- 151
5
votes
Accepted
Cross-platform IDE alternative to MS Visual Studio - other than Eclipse CDT
I would suggest taking a look at Code::Blocks as a possible alternative that is Free, Open Source & Cross Platform.
Your feature requests
Find and replace works like Visual Studio on Windows - ...
- 31.5k
5
votes
Java object cache (in-memory)
tl;dr
No need for a library. The built-in Java libraries suffice.
Use a ConcurrentNavigableMap.
Currently the only bundled implementation is ConcurrentSkipListMap.
Details
Probably not ...
- 3,148
5
votes
Java development environment
JDK
Java is a set of specifications, for the language and for the JVM.
To do your programming, you need an implementation of those specs. That implementation is known as a Java Development Kit (JDK).
...
- 3,148
4
votes
A simple Java database library?
Xodus
Based on your requirements, I think JetBrains Xodus is a very choice of database. It has three types of database- a key-value storage, an entity-store and a database for files and streams.
#1: ...
- 161
4
votes
Free or nearly free PDF library for Java
The Apache PDFBox® library is an open source Java tool for working with PDF documents. This project allows creation of new PDF documents, manipulation of existing documents and the ability to extract ...
- 223
4
votes
Java Open Source Imaging Library as a substitute to the JAI
Disclosure: I'm the main author/maintainer of the suggested library, but it seems to be a very good match for what the question asks.
TwelveMonkeys ImageIO
This project contains a large collection of ...
- 236
4
votes
Java data structure to store latitude-longitude points, and retrieve them by area
Quadtree is usable:
Free, open source
Find objects within a rectangle
Set an object at particular coordinates
24 KB
... but it has some drawbacks:
Search is not by radius, it is rectangle.
Flat map,...
- 19.4k
4
votes
Accepted
Java library to generate DDL
jOOQ
jOOQ provides a DSL for creating tables:
Connection conn = ... //code that creates a DB connection
DSLContext create = DSL.using(conn, SQLDialect.ORACLE);
create.createTable("MY_TABLE")
....
- 214
4
votes
Java equivalent to Ruby's SecureRandom?
tl;dr
Integer.toHexString(
new SecureRandom().nextInt()
)
bd594090
JRuby
Run your Ruby code on a JVM with JRuby.
java.security.SecureRandom
Java includes SecureRandom, a cryptographically ...
- 3,148
4
votes
Accepted
Sparse matrix library for Java
There are two libraries I can recommend. Both support sparse matrices, including matrix-matrix multiplication, matrix-matrix element-wise multiplication and matrix-vector multiplication. Both are open-...
- 271
3
votes
Accepted
Tool to programmatically draw logic circuits into PDF
I would suggest taking a look at SchemDraw which is a python package which:
can output results in svg, eps, or pdf,
allows you to define your own components,
is cross platform, (including windows),
...
- 31.5k
3
votes
Free or nearly free PDF library for Java
jPDFWriter
Our software jPDFWriter is a Java library that can create PDF documents. jPDFWriter is free to use for commercial purposes, there are no license fees.
jPDFWriter can create PDF files in ...
3
votes
Accepted
Java data structure to store latitude-longitude points, and retrieve them by area
It's been several months since you posted your request, but if you still have the need, please consider FeSimpleGeoProx
I think it meets all of your stated requirements: FeSimpleGeoProx is a ...
- 236
3
votes
Accepted
Java library to transform kanji/katakana/hiragana to romaji
Jakaroma does this, and it is based on Kuromoji which is much better at kanji transliteration than Kakasi and even Mecab.
100% Java
Open source: Apache 2 license
Size: 11 MB
Transliteration quality: ...
- 19.4k
3
votes
Accepted
Headless browser for Java that can execute JavaScript on a page
If you install a headless browser such phantomjs or slimerjs on the machine you can use a CasperJS interface to control it.
There's a jUnit-CasperJS project on Github that can be convenient for this ...
- 299
3
votes
Cross-platform IDE alternative to MS Visual Studio - other than Eclipse CDT
It seems that JetBrains CLion may meet almost all of your requirements. It is often not gratis, though.
You might also want to have a look at the C++ IDE comparison table on Wikipedia.
- 3,149
3
votes
Accepted
NDepend for Java
try this : http://www.jarchitect.com/
I think it is related in some way (not sure)to the company which makes NDepend. It should have what you need, as it also has the code query linq
- 46
3
votes
Accepted
Is there Java Gimp API for manipulating images
I don't know of a working Java Gimp Library but there is a couple of Java interfaces to ImageMagick that will let you do everything in your examples.
JMagick provides an object-oriented Java ...
- 31.5k
3
votes
Which technology should I use to create Image Processing Web Application
Since you already know Java and want to be able to implement all the functionality you need along with keeping the flexibility to add any further image processing to your application as needed, you ...
- 221
3
votes
Accepted
WhatsApp API / Library / service for private smart home project
There is a python WhatsApp library called yowsup that should let your RaspberryPi act as a client for a WhatsApp account. See here for a comprehensive walk-through of doing so.
This library will ...
- 31.5k
3
votes
Accepted
Scheduling a task in java for specified date periodically?
Most developers use Quartz for this kind of things.
Here is how you call Quartz to execute a task every 2 days at 03:00:00 :
trigger = newTrigger()
.withIdentity("trigger3", "group1")
....
- 19.4k
3
votes
Java equivalent to NumPy
The nd4j.org API tries to mimic the semantics of Numpy, Matlab and scikit-learn. deeplearning4j.org is based on nd4j.
- 161
3
votes
Accepted
Offline database for Java
Spreadsheet or FileMaker
For a mere 10 megs of data in a single table (list), consider using a spreadsheet or FileMaker rather than building your own app.
Database versus File
If your data is ...
- 3,148
3
votes
Accepted
Embedded database on Java
H2
H2 Database is a relational database engine built in pure Java. Actively developed by someone with a long history of making such products. Open-source and free-of-cost.
Can be used either ...
- 3,148
3
votes
Accepted
Java 11 release that I can use for both development and deployment without cost
tl;dr
(source: adoptium.net)
Use a build of OpenJDK provided by the Adoptium project.
Or, for specific needs, consider any of several other vendors discussed below.
New release cadence and policies
...
- 3,148
Only top scored, non community-wiki answers of a minimum length are eligible