Add GitHub Actions workflow to build and test Java project (#21)

* Add GitHub Actions workflow to build and test Java project

.github/workflows/maven.yml

@@ -0,0 +1,37 @@
+name: Java CI with Maven
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    - name: Set up JDK 11
+      uses: actions/setup-java@v2
+      with:
+        distribution: 'adopt'
+        java-version: 11
+
+    - name: Cache Maven packages
+      uses: actions/cache@v2
+      with:
+        path: ~/.m2/repository
+        key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+        restore-keys: |
+          ${{ runner.os }}-maven-
+
+    - name: Build with Maven
+      run: mvn clean install -Dgpg.skip=true
+
+    - name: Run unit tests
+      run: mvn test

README.md

@@ -1,9 +1,14 @@
 # jHam, Java Ham Radio Library
+[![Build Status](https://github.com/Smerty/jham/actions/workflows/maven.yml/badge.svg)](https://github.com/Smerty/jham/actions)
+
 Collection of utilities related to amateur radio.
 
 ## Using with Maven
     <dependency>
        <groupId>org.smerty</groupId>
        <artifactId>jham</artifactId>
        <version>1.0</version>
-    </dependency>
+    </dependency>
+
+## Automated Build Process
+This project uses GitHub Actions for continuous integration. The build process is triggered on push and pull request events for the `main` branch. The workflow file is located at `.github/workflows/maven.yml`.

pom.xml

@@ -31,8 +31,8 @@
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
         <configuration>
-          <source>1.5</source>
-          <target>1.5</target>
+          <source>1.6</source>
+          <target>1.6</target>
         </configuration>
       </plugin>
       <plugin>
@@ -58,6 +58,9 @@
             </goals>
           </execution>
         </executions>
+        <configuration>
+          <additionalJOption>-Xdoclint:none</additionalJOption>
+        </configuration>
       </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>

src/main/java/org/smerty/jham/Angle.java

@@ -7,7 +7,7 @@
  * Allow for easy use of angles without messy conversions to and from degrees
  * and radians.
  *
- * @author Paul Picazo <[email protected]>
+ * @author Paul Picazo &lt;[email protected]&gt;
  *
  */
 public class Angle {

src/main/java/org/smerty/jham/Latitude.java

@@ -6,7 +6,7 @@
 /**
  * Latitude.
  *
- * @author Paul Picazo <[email protected]>
+ * @author Paul Picazo &lt;[email protected]&gt;
  *
  */
 public class Latitude extends Angle {

src/main/java/org/smerty/jham/Location.java

@@ -6,7 +6,7 @@
  * "Conversion Between Geodetic and Grid Locator Systems" by Edmund T. Tyson,
  * N5JTY in QST January 1989, pp. 29-30, 43
  *
- * @author Paul Picazo <[email protected]>
+ * @author Paul Picazo &lt;[email protected]&gt;
  *
  */
 public class Location {

src/main/java/org/smerty/jham/Longitude.java

@@ -6,7 +6,7 @@
 /**
  * Longitude.
  *
- * @author Paul Picazo <[email protected]>
+ * @author Paul Picazo &lt;[email protected]&gt;
  *
  */
 public class Longitude extends Angle {