Turning In

src/main/java/AustralianDollar.java

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+public class AustralianDollar extends Currency{
+
+    public AustralianDollar(double exchangeRate) {
+        super(exchangeRate,  "AU$");
+    }
+}

src/main/java/BritishPound.java

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+public class BritishPound extends Currency{
+
+    public BritishPound(double exchangeRate) {
+        super(exchangeRate,  "\u00A3");
+    }
+}

src/main/java/CanadianDollar.java

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+public class CanadianDollar extends Currency{
+
+    public CanadianDollar(double exchangeRate) {
+        super(exchangeRate,  "CAN$");
+    }
+}

src/main/java/ChineseYuan.java

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+public class ChineseYuan extends Currency {
+
+    public ChineseYuan(double exchangeRate) {
+        super(exchangeRate,  "\u5706");
+    }
+}

src/main/java/Currency.java

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+public abstract class Currency {
+    private double exchangeRate;
+    private String currencySymbol;
+
+
+    public Currency(double exchangeRate, String currencySymbol){
+        this.exchangeRate = exchangeRate;
+        this.currencySymbol = currencySymbol;
+    }
+
+    @Deprecated
+    public Currency(double exchangeRate){
+        this(exchangeRate, null);
+    }
+
+    protected  void changeRate(double newRate){
+        this.exchangeRate = newRate;
+    }
+
+    protected double getRate(){
+        return this.exchangeRate;
+    }
+
+    protected  double convertToNewCurrency(double denomination, Currency newCurrency) {
+        return newCurrency.convertFromDollars(this.convertToDollars(denomination));
+    }
+
+    protected double convertFromDollars(double denominationInDollars) {
+        double workingDollars = multiplyBy100(denominationInDollars);
+        return divideBy100(Math.round(workingDollars * this.getRate()));
+    }
+
+    protected double convertToDollars(double denominationInForeignCurrency) {
+        double workingForeignCurrency = multiplyBy100(denominationInForeignCurrency);
+        return divideBy100(Math.round(workingForeignCurrency / this.getRate()));
+    }
+
+
+    protected double multiplyBy100(double valueToMultiply) {
+        double multipliedValue = Math.round(valueToMultiply * 100);
+        return multipliedValue;
+    }
+
+    protected double divideBy100(double valueToDivide) {
+        double dividedValue = valueToDivide / 100;
+        return dividedValue;
+    }
+
+    protected String displayWithSymbol (double amount){
+        StringBuilder builder = new StringBuilder();
+        builder.append(String.format("%4s", this.currencySymbol)).append(" " + amount + "\n");
+        return builder.toString();
+    }
+
+
+
+}

src/main/java/Dollar.java

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+public class Dollar extends Currency {
+
+    public Dollar(double exchangeRate) {
+        super(exchangeRate, "$");
+    }
+}

src/main/java/Euro.java

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+public class Euro extends Currency {
+
+    public Euro(double exchangeRate) {
+        super(exchangeRate,  "\u20AC");
+    }
+}

src/main/java/IndianRupee.java

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+public class IndianRupee extends Currency{
+
+    public IndianRupee(double exchangeRate) {
+        super(exchangeRate,  "\u20A8");
+    }
+}

src/main/java/JapaneseYen.java

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+public class JapaneseYen extends Currency {
+
+    public JapaneseYen(double exchangeRate) {
+        super(exchangeRate,  "\u00A5");
+    }
+}

src/main/java/MalaysianRinggit.java

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+public class MalaysianRinggit extends Currency{
+
+    public MalaysianRinggit(double exchangeRate) {
+        super(exchangeRate,  "RM");
+    }
+}

src/main/java/SingaporeDollar.java

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+public class SingaporeDollar extends Currency {
+
+    public SingaporeDollar(double exchangeRate) {
+        super(exchangeRate,  "S$");
+    }
+}

src/main/java/SwissFranc.java

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+public class SwissFranc extends Currency {
+
+    public SwissFranc(double exchangeRate) {
+        super(exchangeRate,  "\u20A3");
+    }
+}