diff --git a/bin/C3PO.class b/bin/C3PO.class
index cfa7783..5180443 100644
Binary files a/bin/C3PO.class and b/bin/C3PO.class differ
diff --git a/bin/Nexus6.class b/bin/Nexus6.class
index d56ae45..82a30f8 100644
Binary files a/bin/Nexus6.class and b/bin/Nexus6.class differ
diff --git a/bin/R2D2.class b/bin/R2D2.class
index 99b8a32..c720f49 100644
Binary files a/bin/R2D2.class and b/bin/R2D2.class differ
diff --git a/src/C3PO.java b/src/C3PO.java
index fdc0ce8..9196d28 100644
--- a/src/C3PO.java
+++ b/src/C3PO.java
@@ -5,22 +5,23 @@ import java.util.Arrays;
 import java.util.stream.Collectors;
 
 public class C3PO implements Robot {
+	//declaring
     private int id;
     private String name;
     private boolean isPowerOn;
 
 
-
+    //returns id
     @Override
     public int getId() {
         return id;
     }
-
+    //returns name
     @Override
     public String getName() {
         return name;
     }
-
+    //returns isPorwerOn true if it's false
     @Override
     public void triggerPowerSwitch() {
     if(isPowerOn==false){
@@ -30,17 +31,19 @@ public class C3PO implements Robot {
     }
     }
     //tes test
-
+    
+    //returns isPowerOn
     @Override
     public boolean isPowerOn() {
         return isPowerOn;
     }
-
+    //creating a RobotException
     @Override
     public RobotException getLastException() {
         return null;
     }
-
+    
+    //speak method that returns the sorted and formated numbers from the array zahlen
     @Override
     public String speak(int[] zahlen) throws RobotException {
 
@@ -48,7 +51,10 @@ public class C3PO implements Robot {
 
         return arrayFormatieren(sortiert);
     }
-
+    
+    //method to format the result 
+    //Returns a Stream consisting of the elements of this stream,each boxed to an Integer and maps it into a String
+    //each element of the Stream is separated by ;
     private String arrayFormatieren(int[] zahlen){
         var ergebnis = Arrays.stream(zahlen)
                 .boxed()
@@ -56,6 +62,8 @@ public class C3PO implements Robot {
                 .collect(Collectors.joining(";"));
         return ergebnis;
     }
+    
+    //method that sorts the array zahlen with the Selectionsort-Algorithmin in descending order
     @Override
     public int[] think(int[] zahlen) throws RobotException {
         int n = zahlen.length;
diff --git a/src/Nexus6.java b/src/Nexus6.java
index 1338ab1..3a4f8bc 100644
--- a/src/Nexus6.java
+++ b/src/Nexus6.java
@@ -6,55 +6,55 @@ import java.util.Arrays;
 import java.util.stream.Collectors;
 
 public class Nexus6 implements Robot {
-	
+	//declaring and initializing
 	private int id = 19281982;
     private String name = "pris";
     private boolean isPowerOn = false;
     
-    
+    //creating an instance of Nexus
 	private static Nexus6 instance = new Nexus6();
-	
+	//constructor of Nexus
     private Nexus6() {
     }
 
-    
+    //instance of Nexus is null
     public static Nexus6 getInstance() {
     	if (instance == null)
     		 instance = new Nexus6();
     		 return instance;
     		}
     
-   
+    //returns id
     @Override
     public int getId() {
         return id;
     }
-
+    //returns name
     @Override
     public String getName() {
         return name;
     }
-
+    //isPowerOn must be false
     @Override
     public void triggerPowerSwitch() {
     if(isPowerOn==false){
-        isPowerOn=true;
+        isPowerOn=false;
     }else{
         isPowerOn=false;
     }
     }
     
-
+    //retruns isPowerOn
     @Override
     public boolean isPowerOn() {
         return isPowerOn;
     }
-
+    //creating a RobotException
     @Override
     public RobotException getLastException() {
         return null;
     }
-
+    
     @Override
     public String speak(int[] zahlen) /*throws RobotIllegalStateException */{
 
@@ -62,7 +62,7 @@ public class Nexus6 implements Robot {
 
         return arrayFormatieren(sortiert);
     }
-
+    
     private String arrayFormatieren(int[] zahlen){
         var ergebnis = Arrays.stream(zahlen)
                 .boxed()
diff --git a/src/R2D2.java b/src/R2D2.java
index 502f6fa..12597aa 100644
--- a/src/R2D2.java
+++ b/src/R2D2.java
@@ -5,22 +5,23 @@ import java.util.Arrays;
 import java.util.stream.Collectors;
 
 public class R2D2 implements Robot {
-    private int id;
+	//declaring
+	private int id;
     private String name;
     private boolean isPowerOn;
 
 
-
+    //returns id
     @Override
     public int getId() {
         return id;
     }
-
+    //returns name
     @Override
     public String getName() {
         return name;
     }
-
+    //returns isPorwerOn true if it's false
     @Override
     public void triggerPowerSwitch() {
     if(isPowerOn==false){
@@ -29,17 +30,17 @@ public class R2D2 implements Robot {
         isPowerOn=false;
     }
     }
-
+    //returns isPowerOn
     @Override
     public boolean isPowerOn() {
         return isPowerOn;
     }
-
+    //creating a RobotException
     @Override
     public RobotException getLastException() {
         return null;
     }
-
+    //speak method that returns the sorted and formated numbers from the array zahlen
     @Override
     public String speak(int[] zahlen) throws RobotException {
 
@@ -47,7 +48,9 @@ public class R2D2 implements Robot {
 
         return arrayFormatieren(sortiert);
     }
-
+    //method to format the result 
+    //Returns a Stream consisting of the elements of this stream,each boxed to an Integer and maps it into a String
+    //each element of the Stream is separated by ,
     private String arrayFormatieren(int[] zahlen){
         var ergebnis = Arrays.stream(zahlen)
                 .boxed()
@@ -55,6 +58,7 @@ public class R2D2 implements Robot {
                 .collect(Collectors.joining(","));
         return ergebnis;
     }
+    //method that sorts the array zahlen with the Selectionsort-Algorithmin in ascending order
     @Override
     public int[] think(int[] zahlen) throws RobotException {
         int n = zahlen.length;