Full commit

Code/Steiner/static_theorie/src/App.java

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+public class App {
+    public static void main(String[] args) throws Exception {
+        Person.counter = 10;
+        Person p1 = new Person("Peter");
+        Person p2 = new Person("Hanna");
+
+        Person.tuWas();
+
+        System.out.println(Math.sin(45));
+    }
+}

Code/Steiner/static_theorie/src/Person.java

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+public class Person {
+    static int counter = 0;
+    String name = "";
+
+    public Person(String n) {
+        this.name = n;
+        counter++;
+    }
+
+    public static void tuWas() {
+        System.out.println(" tue etwas");
+    }
+}