diff --git a/2Semester/src/Set/Pruefungsanmeldung.java b/2Semester/src/Set/Pruefungsanmeldung.java
new file mode 100644
index 0000000..ac1d494
--- /dev/null
+++ b/2Semester/src/Set/Pruefungsanmeldung.java
@@ -0,0 +1,38 @@
+package Set;
+
+import java.io.PrintStream;
+import java.util.*;
+
+public class Pruefungsanmeldung {
+	TreeSet<Student> anmeldung = new TreeSet<Student>();
+
+	public boolean anmelden(Student student) {
+		if ((anmeldung.contains(student)))
+			return false;
+		else {
+			anmeldung.add(student);
+			return true;
+		}
+	}
+
+	public class Student {
+
+		public Student(double mtrn, String nn, String vn, String pm) {
+			matrikelnr = mtrn;
+			nachname = nn;
+			vorname = vn;
+			prüfungsmodul = pm;
+		}
+
+		double matrikelnr;
+		String nachname;
+		String vorname;
+		String prüfungsmodul;
+
+	}
+	
+	public static void main (String []args) {
+		PrintStream cons=System.out;
+		
+	}
+}
diff --git a/2Semester/src/postfixNotation/package-info.java b/2Semester/src/postfixNotation/package-info.java
deleted file mode 100644
index 7f26a5e..0000000
--- a/2Semester/src/postfixNotation/package-info.java
+++ /dev/null
@@ -1 +0,0 @@
-package postfixNotation;
\ No newline at end of file