Questions tagged [java]

Questions about interfacing Mathematica and Java, particularly using J/Link.

Filter by
Sorted by
Tagged with
7
votes
1answer
440 views

Add new JDBC Driver to connect Mathematica to SQL database

I cannot open a SQLConnection to a SQL vectorwise database and I assume the JDBC driver is the problem. A JAR file was provided to me - the only info additionally provided to me was the java class: ...
17
votes
3answers
1k views

Implementing Local HTTP Server

How might I implement a local HTTP server using either Java, C#, C or purely Mathematica? It should be able to respond with Mathematica input to GET and POST requests ideally on W7. This is related ...
3
votes
0answers
32 views

J/Link with Environment Variables and Command-Line Parameters

I have inherited a large number of Java files with classes I am trying to call from Mathematica via J/Link. They are legacy and am not at liberty to modify. A few are used on command-line scripts (...
0
votes
0answers
49 views

429 error when importing webpage

I am interested in checking which of my favorite groceries are on special at which supermarket before going to the shops (to know which items to buy from which supermarket) but every time I try to ...
4
votes
1answer
35 views

Prevent JLink from using a DisabledPreferencesFactory with Java on Linux

This is kind-of a strange question, so please bear with me. We have a Java application that has a utility for Mathematica 12 that lets you run our app from Mathematica using JLink. This works fine ...
0
votes
0answers
270 views

script to remove multiple Connection Linkedin

Unfortunately i have so many Connections About 20,000 in Linkedin, so i need to delete them all in multiple way, but Linkedin allow one by one. i searched there's a way in Internet, but all of them ...
0
votes
0answers
23 views

Approximating the density of an arbitrary set using an arbitrary Folner Sequence of its superset [duplicate]

How do we use Programming to approximate this limit where is the density of in , is the Folner Sequence of , is an interval with , and . For more information, click on this link (replace G,X,i,g ...
5
votes
1answer
56 views

Missing ticks and numbers on a plot when using JLink + Mathematica 11.3

I am facing a pretty random problem using JLink (Java) connected to a Mathematica 11.3 kernel and front-end. Basically I want to get an image using the JLink Java method ...
3
votes
1answer
257 views

Is there any way that convert entire mathematica code to java or python?

I am novice to Mathematica. I want to convert Mathematica code from my textbook to Java or Python to trace coding.
2
votes
1answer
77 views

Convert a Java object to interface via J/Link

I'm trying to use a Java library called CDK with Mathematica's J/Link. ...
14
votes
1answer
320 views

Using ImageJ filters directly from Mathematica through J/Link

tl;dr I am looking for a short but complete example that shows how to apply an ImageJ filter to a Mathematica Image through J/Link. Fiji/ImageJ is one of the ...
4
votes
2answers
138 views

J/Link HMAC Base64

I am trying to recreate a Java algorithm in Mathematica. It is taking a key and signing a message using the HMAC and SHA256 algorithm. The Java code for which I am basing it off is here I have ...
1
vote
0answers
99 views

Lock cursor position to mouse

I would like to lock the cursor position, i.e. the insertion point, to the current position of the mouse at all times in a given notebook. An experiment with J/Link approximates this, by repeatedly ...
9
votes
1answer
122 views

How to launch a separate Java VM on each sub-Kernel?

I have some code that process very large flat files in to separate HSQL(Standalone) databases using ParallelSubmit and JDBC for each file using the strategy in this post (19542). Lately I keep ...
5
votes
1answer
93 views

Incorrect number or type of argument when using Jlink to call setAccessible

I am trying to use Java reflection to access stateVector from the following package: ...
6
votes
1answer
255 views

Update Java used by Mathematica 10

I would like to update the Java version used by Mathmematica 10 from 1.7.x to 1.8.x/ Is it possible without installing Mathematica 11? I have the latest Java on my system, but Mathematica 10 uses an ...
0
votes
2answers
146 views

Clearing the JavaClassPath at Runtime in JLink

I am trying to access a remote MongoDB database through Mathematica using JLink. The connection is fine, but my installation of Mathematica 10.0 seems to contain an SLF4J logger addon, which prints ...
1
vote
0answers
165 views

Is there a way to know how much Java heap space to set?

I have already set it to be 4GB. Needs["JLink`"] ReinstallJava[JVMArguments -> "-Xmx4096m"] However, when exporting a dataset to Excel sheet, I still get the ...
0
votes
0answers
124 views

How to save Image or Graphics in Terminal? [duplicate]

In my Linux computer,it can't save Image or Graphics to picture format such as ...
2
votes
0answers
118 views

System.Out.println in JLink does not flush to

I am playing with JLink in Mathematica. I created a simple Java(Kotlin) Class HelloKT like this: ...
3
votes
1answer
226 views

What does it mean that GUIkit is being deprecated?

What is the disadvantage of using GUIKit now? What does it mean that it is being deprecated? Will it be removed from Mathematica in some later versions?
0
votes
1answer
31 views

Need J/Link values returned in 1D instead of 2D format (i.e., not exponents, fractions, on multiple lines)

The following code shows how default KernelLink values are sent back to Java in 2D text form. Which becomes a heap-big mess in an array of exponential values, since all the exponents are printed first ...
1
vote
1answer
184 views

Trying to run J/Link SampleProgram.java from Mac Terminal: Exception in thread “main”

Trying to run the [WSTP J/Link SampleProgram.java][1] Mathematica version 11.0.1.0 file from the MacOS Sierra version 10.12.6 Terminal, generates "Exception in thread "main" ... Updating to Oracle ...
2
votes
0answers
200 views

Mathematica GUIKit [duplicate]

Does anyone of you know if the GUIKit package is still under some development by Wolfram Research or is the current version 1.1.0 the last one. Does it make sense to make GUIs using this package in ...
11
votes
7answers
2k views

Installing RLink on Linux

I'm trying to install RLink here. Needs["RLink`"] InstallR[] After downloading it throws an error: ...
7
votes
2answers
1k views

How can I integrate Open-CV with Mathematica?

I would like to run Open-CV functions from within Mathematica, can anyone figure out how to do this?
3
votes
1answer
68 views

Failed to load JLink in consecutive antcall's

I'm using Ant script in Eclipse using Workbench on Windows 7. I've used multiple versions but the issue persists. Essentially, I define multiple targets and call them in sequence like this: Multiple ...
7
votes
1answer
160 views

J/Link stealing focus from the Front End on OS X. Workaround?

Link to Wolfram Community version Calling getDefaultToolkit() through J/Link causes the Front End to lose focus. This is specific to OS X. Here is a minimal ...
3
votes
0answers
60 views

How to temporarily turn off log messages?

I'm using GUIKit in Mathematica 11.0, which throws an error message whenever a window or panel is shown. I know GUIKit is deprecated but I don't want to port a whole project to the newer controls. ...
2
votes
1answer
139 views

How to get the image in the clipboard with a J/Link method?

The Paste will not give a return,just print the content of clipboard.It is hard to asign the result to a variable.I make a .NET method here to get the image in ...
2
votes
0answers
589 views

How to lock a socket or create a queue for requests?

I try to implement sockets from java.net.ServerSocket in Mathematica. I execute this code step by step: Needs["JLink`"] InstallJava[] (* LinkObject[..] *) ...
12
votes
3answers
8k views

Connect to SQLite database

I am trying to connect to a SQLite database and since there is no officially supported driver; I decided to use the sqlite-jdbc driver and port the respective code into Mathematica. However, the ...
11
votes
1answer
575 views

How to set up LinkSnooper for monitoring FrontEnd--Kernel communication?

What is the simplest way to set up LinkSnooper to monitor the communication between the Kernel and the Front End? I am looking for an answer that works on all platforms, including 32-bit Windows.
4
votes
1answer
178 views

When using Java objects through JLink, how can I multitask the objects?

I use Mathematica 11.0.1 on Windows 10 and have a Java class which acts as a 'facade' for a headless browser (PhantomJS). In Mathematica I instantiate the class through JLink as follows: ...
1
vote
0answers
49 views

Instant detection of digital or analogue variation of a variable with Mathematica in Windows 8.1

I am using an assembly that contains two acquisition board (PCI-1742U-AE and PCIE-1816H-AE) and an external circuit, connected to boards. The computer uses Windows 8.1, and the communication is done ...
2
votes
2answers
833 views

How to get a audio file's duration time in Mathematica?

I have a *.avi file and if I want to know the file's duration time: I can use this code to get the result: Import["test.avi", "Duration"] or the code to get the ...
1
vote
0answers
51 views

Creating an automatic code feedback for class

I'm trying to create a server application that accepts uploaded Mathematica files (that follow a certain API), then run a few tests on modules defined within those files. This is for a course where ...
9
votes
1answer
1k views

How can I connect to the IB TWS platform from Mathematica?

TWS is the trading platform of Interactive Brokers. Accessing it programmatically could be useful for various purposes. How could I access it from Mathematica ?
11
votes
3answers
3k views

Dynamic graph visualisation using JLink/Java and GraphStream

Visualising the addition of new nodes and edges to a graph to 'watch it grow' is to something Mathematica is not suited to by default. However this type of animation really helps convey the emergence ...
5
votes
2answers
422 views

J/Link: How to run a thread inside Mathematica

In the J/Link User Guide there is no example on how to use java.lang.Thread, from inside Mathematica. I'd like to know if is possible to start a thread from a ...
3
votes
0answers
82 views

Failure connecting JLink with Android Studio -Java application

I want to connect an android application with Mathematica, in order to make some computations and then return the results to the user. I have downloaded Mathmatika and run the Examples from JLink ...
3
votes
1answer
575 views

How to call a java method that takes a boolean (not Boolean)?

I'm trying to call a method on a java object that takes a single boolean argument - note boolean (native or primative) not Boolean (Object or Reference type). ...
8
votes
2answers
134 views

Is it possible to get the locations and dimensions of all boxes in a StandardForm expression renderation?

I can select all the boxes in a StandardForm rendered expression, like I've selected the left parenthesis in the picture above. Is it possible to get the positions and dimensions of all of these ...
7
votes
1answer
548 views

How to create keypress simulation program?

Main Problem I'm trying to create a widely applicable keypress simulation program, but I don't know how to use Java so I can only search for Q&As on the site, which is inefficient. So I want to ...
2
votes
1answer
77 views

What does the function StartJava do? [closed]

In Mathematica's autocomplete list, the function StartJava appeared. I searched the mathematica's reference site and found that the function was undocumented. What does it do?
15
votes
3answers
1k views

Mathematica usage (success stories) for financial back-ends

I've been working for about 5 years in Java, developing financial back-offices (web-services, business logic, report generation etc.). I think Mathematica is very suitable for such calculations and ...
5
votes
1answer
175 views
1
vote
1answer
74 views

can CDFDeploy command work via JLink

I tried the following command in notebook. It creates a .cdf file. ...
3
votes
0answers
102 views

What is the appropriate way to handle JVM memory issues in a Mathematica package?

I maintain a large Mathematica package (here) that, for certain operations, calls out to a Java library (here). The details of the libraries are not important, but I've come across a frustration with ...