Add Java to README

.github/workflows/java.yml

@@ -57,7 +57,7 @@ jobs:
       - name: Set up JDK
         uses: actions/setup-java@v1
         with:
-          java-version: '1.8'
+          java-version: '1.7'
           java-package: jdk
           architecture: x64
       - name: Download Windows built library

README.md

@@ -92,6 +92,31 @@ const minified = hyperbuild.minify("<p>  Hello, world!  </p>");
 
 </details>
 
+<details>
+<summary><strong>Java</strong></summary>
+
+hyperbuild is available via JNI, and supports Java versions 7 and higher.
+
+##### Get
+
+Download the [JAR](https://wilsonl.in/hyperbuild/bin/0.0.18.jar) file.
+
+##### Use
+
+Make sure to add the JAR file to the class path.
+
+```java
+import in.wilsonl.hyperbuild.Hyperbuild;
+
+class Main {
+    public static void main(String[] args) {
+        String minified = Hyperbuild.minify("<p>  Hello, world!  </p>");
+    }
+}
+```
+
+</details>
+
 ## Minification
 
 ### Whitespace

java/pom.xml

@@ -44,8 +44,8 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>
-                    <source>7</source>
-                    <target>7</target>
+                    <source>1.7</source>
+                    <target>1.7</target>
                 </configuration>
             </plugin>
         </plugins>