diff --git a/src/main/java/src/TasksFrame.java b/src/main/java/src/TasksFrame.java
index 0c964ae..87cdf99 100644
--- a/src/main/java/src/TasksFrame.java
+++ b/src/main/java/src/TasksFrame.java
@@ -102,11 +102,53 @@ public class TasksFrame extends JFrame {
 
         setupBmi();
 
+        setupReverse();
 
+    }
+
+    private void setupReverse() {
+
+        JPanel jPanel = setupPanel("Text reverse");
+
+        JButton button = new JButton("reverse");
+        button.setVisible(true);
+        button.setBounds(10, 65, 100, 30);
+        button.setBackground(Color.BLUE);
+
+        JTextField jTextField = new JTextField();
+        jTextField.setVisible(true);
+        jTextField.setBounds( 10, 40,  150, 20);
+        jTextField.setFont(new java.awt.Font("Arial", Font.BOLD, 12));
 
 
+
+        JLabel jLabel = new JLabel();
+        jLabel.setVisible(true);
+        jLabel.setBounds(10, 90, 150, 30);
+
+
+        jPanel.add(button);
+        jPanel.add(jTextField);
+        jPanel.add(jLabel);
+
+        button.addActionListener(e -> {
+            String text = jTextField.getText();
+            String res = reverse(text);
+            jLabel.setText(res);
+        });
     }
 
+    private String reverse(String text) {
+        StringBuilder reversed = new StringBuilder();
+        for (int i = text.length() - 1; i >= 0; i--) {
+            reversed.append(text.charAt(i));
+        }
+        return reversed.toString();
+    }
+
+
+
+
     private void setupKreisUmfang() {
 
         JPanel jPanel = setupPanel("Kreisumfang");
@@ -136,8 +178,8 @@ public class TasksFrame extends JFrame {
             @Override
             public void actionPerformed(ActionEvent e) {
                 String text = jTextField.getText();
-                Double val = Double.valueOf(text);
-                double res = Double.valueOf(kreisUmfang(val));
+                double val = Double.parseDouble(text);
+                double res = kreisUmfang(val);
                 jLabel.setText(String.valueOf(res));
             }
         });
@@ -146,8 +188,7 @@ public class TasksFrame extends JFrame {
     public double kreisUmfang(double radius) {
 
         double result = 2 * Math.PI * radius;
-        double roundOff = Math.round(result * 100.0) / 100.0;
-        return roundOff;
+        return Math.round(result * 100.0) / 100.0;
     }
 
 
@@ -186,18 +227,15 @@ public class TasksFrame extends JFrame {
         jPanel.add(c);
         jPanel.add(jLabel);
 
-        button.addActionListener(new ActionListener() {
-            @Override
-            public void actionPerformed(ActionEvent e) {
-                String texta = a.getText();
-                String textb = b.getText();
-                String textc = c.getText();
-                Double val_a = Double.valueOf(texta);
-                Double val_b = Double.valueOf(textb);
-                Double val_c = Double.valueOf(textc);
-                double res = average(val_a, val_b, val_c);
-                jLabel.setText(String.valueOf(res));
-            }
+        button.addActionListener(e -> {
+            String texta = a.getText();
+            String textb = b.getText();
+            String textc = c.getText();
+            double val_a = Double.parseDouble(texta);
+            double val_b = Double.parseDouble(textb);
+            double val_c = Double.parseDouble(textc);
+            double res = average(val_a, val_b, val_c);
+            jLabel.setText(String.valueOf(res));
         });
     }
 
@@ -205,8 +243,7 @@ public class TasksFrame extends JFrame {
 
         double sum = a + b + c;
         double average = sum / 3;
-        double roundOff = Math.round(average * 100.0) / 100.0;
-        return roundOff;
+        return Math.round(average * 100.0) / 100.0;
 
     }
 
@@ -251,16 +288,13 @@ public class TasksFrame extends JFrame {
         jPanel.add(textField);
         jPanel.add(jLabel);
 
-        button.addActionListener(new ActionListener() {
-            @Override
-            public void actionPerformed(ActionEvent e) {
-                String text = jTextField.getText();
-                String text1 = textField.getText();
-                double val = Double.valueOf(text);
-                double val1 = Double.valueOf(text1);
-                double res = Double.valueOf(expo(val, val1));
-                jLabel.setText(String.valueOf(res));
-            }
+        button.addActionListener(e -> {
+            String text = jTextField.getText();
+            String text1 = textField.getText();
+            double val = Double.parseDouble(text);
+            double val1 = Double.parseDouble(text1);
+            double res = expo(val, val1);
+            jLabel.setText(String.valueOf(res));
         });
 
 
@@ -268,8 +302,7 @@ public class TasksFrame extends JFrame {
 
     public double expo(double base, double exp) {
 
-        double result = Math.pow(base, exp) ;
-        return result;
+        return Math.pow(base, exp);
     }
 
     private void setupDate() {
@@ -328,24 +361,20 @@ public class TasksFrame extends JFrame {
         jPanel.add(textField);
         jPanel.add(jLabel);
 
-        button.addActionListener(new ActionListener() {
-            @Override
-            public void actionPerformed(ActionEvent e) {
-                String text = jTextField.getText();
-                String text1 = textField.getText();
-                double val = Double.valueOf(text);
-                double val1 = Double.valueOf(text1);
-                double res = Double.valueOf(bmi(val, val1));
-                jLabel.setText(String.valueOf(res));
-            }
+        button.addActionListener(e -> {
+            String text = jTextField.getText();
+            String text1 = textField.getText();
+            double val = Double.parseDouble(text);
+            double val1 = Double.parseDouble(text1);
+            double res = bmi(val, val1);
+            jLabel.setText(String.valueOf(res));
         });
     }
 
     public double bmi(double height, double weight) {
         double result = 0.0;
         result = weight / (height * height);
-        double roundOff = Math.round(result * 100.0) / 100.0;
-        return roundOff;
+        return Math.round(result * 100.0) / 100.0;
     }
 
     public double steuer19(double x)
@@ -414,7 +443,7 @@ public class TasksFrame extends JFrame {
             @Override
             public void actionPerformed(ActionEvent e) {
                 String textPreis = preis.getText();
-                double val_preis = Double.valueOf(textPreis);
+                double val_preis = Double.parseDouble(textPreis);
                 double res = steuer7(val_preis);
                 ausgabe.setText("Die Steuer beträgt:" +res +"€");
 
@@ -455,14 +484,11 @@ public class TasksFrame extends JFrame {
         jPanel.add(jTextField);
         jPanel.add(jLabel);
 
-        button.addActionListener(new ActionListener() {
-            @Override
-            public void actionPerformed(ActionEvent e) {
-                String text = jTextField.getText();
-                Integer val = Integer.valueOf(text);
-                int res = Integer.valueOf(umrechnen(val));
-                jLabel.setText(String.valueOf(res));
-            }
+        button.addActionListener(e -> {
+            String text = jTextField.getText();
+            int val = Integer.parseInt(text);
+            int res = Integer.parseInt(umrechnen(val));
+            jLabel.setText(String.valueOf(res));
         });
     }
 
@@ -513,18 +539,15 @@ public class TasksFrame extends JFrame {
         jPanel.add(c);
         jPanel.add(jLabel);
 
-        button.addActionListener(new ActionListener() {
-            @Override
-            public void actionPerformed(ActionEvent e) {
-                String texta = a.getText();
-                String textb = b.getText();
-                String textc = c.getText();
-                Integer val_a = Integer.valueOf(texta);
-                Integer val_b = Integer.valueOf(textb);
-                Integer val_c = Integer.valueOf(textc);
-                int res = roundSum(val_a, val_b, val_c);
-                jLabel.setText(String.valueOf(res));
-            }
+        button.addActionListener(e -> {
+            String texta = a.getText();
+            String textb = b.getText();
+            String textc = c.getText();
+            int val_a = Integer.parseInt(texta);
+            int val_b = Integer.parseInt(textb);
+            int val_c = Integer.parseInt(textc);
+            int res = roundSum(val_a, val_b, val_c);
+            jLabel.setText(String.valueOf(res));
         });
     }
 
@@ -570,18 +593,13 @@ public class TasksFrame extends JFrame {
         jPanel.add(b);
         jPanel.add(jLabel);
 
-        button.addActionListener(new ActionListener() {
-            @Override
-            public void actionPerformed(ActionEvent e) {
-                String texta = a.getText();
-                String textb = b.getText();
-                Integer val_a = Integer.valueOf(texta);
-                Integer val_b = Integer.valueOf(textb);
-                int res = kgV(val_a, val_b);
-                jLabel.setText(String.valueOf(res));
-            }
-
-
+        button.addActionListener(e -> {
+            String texta = a.getText();
+            String textb = b.getText();
+            int val_a = Integer.parseInt(texta);
+            int val_b = Integer.parseInt(textb);
+            int res = kgV(val_a, val_b);
+            jLabel.setText(String.valueOf(res));
         });
 
 
@@ -614,12 +632,9 @@ public class TasksFrame extends JFrame {
         jPanel.add(jTextField);
         jPanel.add(jLabel);
 
-        button.addActionListener(new ActionListener() {
-            @Override
-            public void actionPerformed(ActionEvent e) {
-                int r = quer(Integer.valueOf(jTextField.getText()));
-                jLabel.setText(String.valueOf(r));
-            }
+        button.addActionListener(e -> {
+            int r = quer(Integer.valueOf(jTextField.getText()));
+            jLabel.setText(String.valueOf(r));
         });
     }
 
@@ -663,12 +678,9 @@ public class TasksFrame extends JFrame {
         jPanel.add(jTextField);
         jPanel.add(jLabel);
 
-        button.addActionListener(new ActionListener() {
-            @Override
-            public void actionPerformed(ActionEvent e) {
-                int r = ePhi(Integer.valueOf(jTextField.getText()));
-                jLabel.setText(String.valueOf(r));
-            }
+        button.addActionListener(e -> {
+            int r = ePhi(Integer.valueOf(jTextField.getText()));
+            jLabel.setText(String.valueOf(r));
         });
 
 
@@ -714,6 +726,7 @@ public class TasksFrame extends JFrame {
         button.setBounds(10, 50, 150, 30);
         button.setVisible(true);
         button.setBackground(Color.BLUE);
+       button.setFont(new java.awt.Font("Arial", Font.BOLD, 12));
         button.addActionListener(new ActionListener() {
             @Override
             public void actionPerformed(ActionEvent e) {