target java 8

Author: Project516

app/build.gradle

@@ -39,12 +39,17 @@ java {
     }
 }
 
+tasks.withType(JavaCompile) {
+    options.release.set(8)
+}
+
 application {
     // Define the main class for the application.
     mainClass = 'io.github.project516.NumberGuessingGame.Main'
 }
 
 compileJava.dependsOn spotlessApply
+
 spotless {
     java {
         googleJavaFormat('1.17.0').aosp()

app/src/main/java/io/github/project516/NumberGuessingGame/Main.java

@@ -3,7 +3,7 @@
 public class Main {
     public static void main(String[] args) {
         SystemInfo SysInfo = new SystemInfo();
-        System.out.println("Java version: " + Runtime.version());
+        System.out.println("Java version: " + SysInfo.version());
         System.out.println("Vendor: " + SysInfo.vendor());
         System.out.println("JDK name: " + SysInfo.name());
     }

app/src/main/java/io/github/project516/NumberGuessingGame/SystemInfo.java

@@ -8,4 +8,8 @@ String vendor() {
     String name() {
         return System.getProperty("java.vm.name");
     }
+
+    String version() {
+        return System.getProperty("java.vm.version");
+    }
 }