Sudah bisa DigitalOutput, DigitalInput. Juga sudah menambahkan class NanoPi.

src/Device/NanoPi.java

@@ -0,0 +1,35 @@
+package Device;
+
+public class NanoPi {
+    public int GetGPIO(int pin){
+        int GPIONum;
+        if (pin == 9){
+            GPIONum = 363;
+        } else if (pin == 11) {
+            GPIONum = 203;
+        } else if (pin==2) {
+            GPIONum=5;
+        } else if (pin==4) {
+            GPIONum=4;
+        } else if (pin == 8) {
+            GPIONum=11;
+        } else if (pin==10) {
+            GPIONum=12;
+        } else if (pin==12) {
+            GPIONum=13;
+        }else if (pin==14) {
+            GPIONum=14;
+        }else if (pin==16) {
+            GPIONum=16;
+        }else if (pin==18) {
+            GPIONum=15;
+        }else if (pin==20) {
+            GPIONum=199;
+        }else if (pin==22) {
+            GPIONum=198;
+        }else {
+            GPIONum=-1;
+        }
+        return GPIONum;
+    }
+}

src/DigitalInput.java

@@ -1,7 +1,5 @@
-import java.io.IOException;
-
 public class DigitalInput {
-    private int pinnya=0;
+    private final int pinnya;
     private boolean currentIsON = false;
     private boolean initialized = false;
 
@@ -12,7 +10,10 @@ public class DigitalInput {
     public DigitalInput(int pin_number) {
        // if (jGPIO.osname=="") jGPIO.detectOS();
         pinnya = pin_number;
-        if (Setup_Pin()) initialized = true;
+        if (Setup_Pin()) {
+            initialized = true;
+        }
+        Runtime.getRuntime().addShutdownHook(new Thread(this::Release));
     }
 
     private boolean Setup_Pin() {

src/DigitalOutput.java

@@ -1,9 +1,12 @@
 public class DigitalOutput {
     int pin;
-
-    DigitalOutput(int pinOut) {
+    boolean initState;
+    boolean initialized;
+    DigitalOutput(int pinOut,boolean initialiaState) {
         pin = pinOut;
-
+        initState = initialiaState;
+        initialized = Setup_Pin();
+        Runtime.getRuntime().addShutdownHook(new Thread(this::Release));
     }
 
     private boolean Setup_Pin() {
@@ -16,22 +19,38 @@ public class DigitalOutput {
 
             }
         }
-
-        // sampe sini, harusnya ada
-        // harus set output dulu
+        // set direction first
         if (GeneralCode.SetGpioDirection(pin, true)) {
             // pasang value 1
-            if (GeneralCode.SetGpioValue(pin, true)) {
-                // ubah jadi input
-                if (GeneralCode.SetGpioDirection(pin, false)) {
-                    System.out.println("DigitalInput Setup_Pin success !!");
+            if (GeneralCode.SetGpioValue(pin, initState)) {
+                System.out.println("DigitalOutput Setup_Pin success !!");
                 return true;
-                } else System.out.println("Gagal SetDirection ke Input untuk DigitalInput pin "+pin);
             } else System.out.println("Gagal SetValue ke high untuk DigitalInput pin "+pin);
         } else System.out.println("Gagal SetDirection ke Output untuk DigitalInput pin "+pin);
         return false;
     }
 
+    public void SetHigh(){
+        if (!initialized) {
+            System.out.println("Pin is not initialized");
+            return;
+        }
+        GeneralCode.SetGpioValue(pin,true);
+    }
 
+    public void SetLow(){
+        if (!initialized){
+            System.out.println("Pin is not initialized");
+            return;
+        }
+        GeneralCode.SetGpioValue(pin,false);
+    }
 
+    /*
+     * Release control of Digital Output (not controlling anymore)
+     * return true if success operation
+     */
+    public void Release() {
+        GeneralCode.UnExportGpio(pin);
+    }
 }

src/GeneralCode.java

@@ -4,7 +4,6 @@ import java.util.Objects;
 public class GeneralCode {
     private static final String GPIO_PATH = "/sys/class/gpio/";
 
-
     /**
     check is the OS is Linux or not
      */
@@ -44,7 +43,7 @@ public class GeneralCode {
     /**
      *
      * @param Pin pin that you want to set
-     * @param direction true if In, false if Out
+     * @param direction true if out, false if in
      * @return True if success
      */
     public static boolean SetGpioDirection(int Pin, boolean direction){
@@ -62,7 +61,7 @@ public class GeneralCode {
      * @return true if success
      */
     public static boolean SetGpioValue(int Pin,boolean Value){
-        String valNum = "";
+        String valNum;
         if (Value){
             valNum="1";
         }else {valNum="0";}

src/Main.java

@@ -1,22 +1,25 @@
+import Device.NanoPi;
+
 import java.util.Timer;
 import java.util.TimerTask;
 
 public class Main {
     public static void main(String[] args) {
-        DigitalInput talkButton = new DigitalInput(12);
+        var npi = new NanoPi();
+        DigitalInput talkButton = new DigitalInput(npi.GetGPIO(12));
+        DigitalOutput LED1 = new DigitalOutput(npi.GetGPIO(20),true);
         System.out.println("is initialized :"+ talkButton.getIsInitialized());
-
-        Runtime.getRuntime().addShutdownHook(new Thread(()->{
-            talkButton.Release();
-            System.out.println("program is closed!");
-        }));
         System.out.println("Test Program GPIO di linux");
 
-        Timer testTimer = new Timer();
-        testTimer.schedule(new TimerTask() {
+        Timer MainTimer = new Timer();
+        MainTimer.schedule(new TimerTask() {
             @Override
             public void run() {
-                System.out.println(talkButton.ReadState());
+                if(talkButton.ReadState() == 1 ){
+                    LED1.SetHigh();
+                }else{
+                    LED1.SetLow();
+                }
             }
         },0,1000);