ahhhhhhhhhhhh

Code/Steiner/hotelBookKeeping/.vscode/settings.json

@@ -0,0 +1,7 @@
+{
+    "java.project.sourcePaths": ["src"],
+    "java.project.outputPath": "bin",
+    "java.project.referencedLibraries": [
+        "lib/**/*.jar"
+    ]
+}

Code/Steiner/hotelBookKeeping/README.md

@@ -0,0 +1,18 @@
+## Getting Started
+
+Welcome to the VS Code Java world. Here is a guideline to help you get started to write Java code in Visual Studio Code.
+
+## Folder Structure
+
+The workspace contains two folders by default, where:
+
+- `src`: the folder to maintain sources
+- `lib`: the folder to maintain dependencies
+
+Meanwhile, the compiled output files will be generated in the `bin` folder by default.
+
+> If you want to customize the folder structure, open `.vscode/settings.json` and update the related settings there.
+
+## Dependency Management
+
+The `JAVA PROJECTS` view allows you to manage your dependencies. More details can be found [here](https://github.com/microsoft/vscode-java-dependency#manage-dependencies).

Code/Steiner/hotelBookKeeping/src/Euro.java

@@ -0,0 +1,16 @@
+class Euro extends Waehrung {
+    private static double kurs;
+
+    public Euro(double betrag) {
+        super(betrag);
+    }
+
+    public static void setKurs(double kurs) {
+        Euro.kurs = kurs;
+    }
+
+    @Override
+    public double dollarBetrag() {
+        return getBetrag() * kurs;
+    }
+}

Code/Steiner/hotelBookKeeping/src/USDollar.java

@@ -0,0 +1,11 @@
+class USDollar extends Waehrung {
+
+    public USDollar(double betrag) {
+        super(betrag);
+    }
+
+    @Override
+    public double dollarBetrag() {
+        return this.getBetrag();
+    }
+}

Code/Steiner/hotelBookKeeping/src/Waehrung.java

@@ -0,0 +1,17 @@
+abstract class Waehrung {
+    private double betrag;
+
+    public Waehrung(double betrag) {
+        this.betrag = betrag;
+    }
+
+    public double getBetrag() {
+        return betrag;
+    }
+
+    public void setBetrag(double betrag) {
+        this.betrag = betrag;
+    }
+
+    public abstract double dollarBetrag();
+}

Code/Steiner/hotelBookKeeping/src/WaehrungTest.java

@@ -0,0 +1,25 @@
+public class WaehrungTest {
+
+    public static void main(String[] args) {
+        Yen.setKurs(1.0 / 130);
+        Euro.setKurs(1.0 / 1.05);
+        Waehrung[] geld = new Waehrung[5];
+        geld[0] = new USDollar(2500);
+        geld[1] = new Yen(200000);
+        geld[2] = new Euro(600);
+        geld[3] = new USDollar(20);
+        geld[4] = new Euro(500);
+        double dollarGeldBetrag = berechneDollarGeldBetrag(geld);
+        System.out.println(dollarGeldBetrag);
+    }
+
+    public static double berechneDollarGeldBetrag(Waehrung[] geld) {
+        double summeInDollar = 0;
+        for (Waehrung waehrung : geld) {
+            summeInDollar += waehrung.dollarBetrag();
+        }
+        return summeInDollar;
+
+    }
+
+}

Code/Steiner/hotelBookKeeping/src/Yen.java

@@ -0,0 +1,16 @@
+class Yen extends Waehrung {
+    private static double kurs;
+
+    public Yen(double betrag) {
+        super(betrag);
+    }
+
+    public static void setKurs(double kurs) {
+        Yen.kurs = kurs;
+    }
+
+    @Override
+    public double dollarBetrag() {
+        return getBetrag() * kurs;
+    }
+}