switched to Java 8

pom.xml

@@ -2,7 +2,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>cz.gamesites.mc</groupId>
   <artifactId>AntiAFK</artifactId>
-  <version>1.0-SNAPSHOT</version>
+  <version>1.0</version>
   <name>AntiAFK</name>
   <description>AntiAFK Spigot plugin</description>
 
@@ -31,7 +31,8 @@
         <artifactId>maven-compiler-plugin</artifactId>
         <version>3.8.0</version>
         <configuration>
-          <release>12</release>
+          <target>8</target>
+          <source>1.8</source>
         </configuration>
       </plugin>
     </plugins>

src/cz/gamesites/mc/antiafk/AntiAFK.java

@@ -30,9 +30,9 @@ import net.md_5.bungee.api.ChatColor;
 public class AntiAFK extends JavaPlugin implements Listener {
 
 	// frequency of checks
-	public static final int CHECK_INTERVAL = 20 * 20;
+	public static final int CHECK_INTERVAL = 60 * 20;
 	// how many times a check has to fail in order to mark the player as AFK
-	public static final int STRIKES_AFK = 3;
+	public static final int STRIKES_AFK = 30;
 
 	private static AntiAFK INSTANCE = null;
 	private HashMap<Player, int[]> lastPositions = new HashMap<>();