jdsp

[TOC]

jdsp is my initial attempt at building a library for signal processing in the Java language.

Install

Dependencies	Description	License	Added
JDK21	Migrated to JDK 21 to support jdk.incubator.vector		2026-01-17
Efficient Java Matrix Library (EJML)	External matrix library	LICENSE	2026-01-18
Apache Commons Math 3	Math library	LICENSE-2.0	2026-01-21

To install, perform the following actions.

1. Build

       # Build
       $ gradlew build
   
       # Run Test
       $ gradlew test
   
       # Run Example (run the jar and add the incubator)
       $ gradlew runJar

2. Generate Javadoc

       $ gradlew javadoc

3. Publish jdsp to the local maven repository to be used in another project (for development only)

       $ gradlew publishToMavenLocal

   • Recommendation is to specify version with SNAPSHOT (i.e. v1.0.2-SNAPSHOT)
4. Install
   • Add the jar file to the $CLASSPATH
5. Run

       java --add-modules jdk.incubator.vector -jar build/libs/jdsp-$VERSION.jar

6. Compiling FAT Jar

       # Use fat jar so it includes dependencies
       $ gradlew shadowJar

Github Action

• Set up Java environment with a gradle check
• Create a fat JAR (to include dependencies)
• If tagged
  • Push release to Github, allowing other devs to pull the built fat JAR.
  • Push to Github Maven, allowing Java projects to pull.

Examples

Example: Creating and applying a Filter object

    import jdsp.filters.Filter;
    // constructor defaults to moving average filter
    Filter f = new Filter(11);
    // update filter
    f.designFilter(101, "HAMMING", 0.1);

    // apply filter
    float[] data0 = {1.0f, 2.0f, 3.4f};
    float[] data1 = {1.0f, 2.0f, 3.4f};
    float [] out1, out2;
    out1 = f.applyFilter(data0);

    // continue filter on second data segment
    out2 = f.applyFilter(data1);

Example Plots and Figures

Some functionality was created with Java Swing to provide visual tools to be used with this package.