refactoring: Logic is outsourced to the method

src/digital/technik/DigitalTechnik4.java

@@ -4,7 +4,10 @@ import java.util.Scanner;
 
 public class DigitalTechnik4 {
 
-    public static void main(String[] args) {
+    public DigitalTechnik4() {
+    }
+
+    void start() {
         Scanner sc = new Scanner(System.in);
 
         System.out.println("Willkommen");