diff --git a/T3Q1-4/src/VendingMachine.java b/T3Q1-4/src/VendingMachine.java
index ba34ec0..db668e9 100644
--- a/T3Q1-4/src/VendingMachine.java
+++ b/T3Q1-4/src/VendingMachine.java
@@ -18,8 +18,10 @@ public class VendingMachine {
public void start() {
// This is an infinite loop. This is quite common in applications that must run 24/7
do {
+ double amountInserted = 0.0;
selectDrink();
- checkChange(insertCoins());
+ insertCoins();
+ checkChange(amountInserted);
printReceipt();
} while (true);
}
@@ -28,7 +30,7 @@ public class VendingMachine {
drinkSelection = presentDrinkMenu();
}
- private double insertCoins() {
+ private void insertCoins() {
double amount = 0.0;
Scanner sc = new Scanner(System.in);
@@ -39,7 +41,6 @@ public class VendingMachine {
amount += processCoinAmount(coin);
System.out.printf("Coins inserted: %.2f \n", amount);
} while (amount < availableDrinks[drinkSelection].getPrice());
- return amount;
}
private void checkChange(double amount)
diff --git a/T5Q1/T5Q1.iml b/T5Q1/T5Q1.iml
new file mode 100644
index 0000000..c90834f
--- /dev/null
+++ b/T5Q1/T5Q1.iml
@@ -0,0 +1,11 @@
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/T5Q1/src/ClassA.java b/T5Q1/src/ClassA.java
new file mode 100644
index 0000000..afa22fa
--- /dev/null
+++ b/T5Q1/src/ClassA.java
@@ -0,0 +1,5 @@
+public class ClassA {
+ public void print(int x, String y) {
+ System.out.println(x + " " + y);
+ }
+}
diff --git a/T5Q1/src/ClassB.java b/T5Q1/src/ClassB.java
new file mode 100644
index 0000000..fcdb0c3
--- /dev/null
+++ b/T5Q1/src/ClassB.java
@@ -0,0 +1,5 @@
+public class ClassB extends ClassA {
+ public void print(int x) {
+ System.out.println(x);
+ }
+}
diff --git a/T5Q1/src/ClassC.java b/T5Q1/src/ClassC.java
new file mode 100644
index 0000000..a1fdca0
--- /dev/null
+++ b/T5Q1/src/ClassC.java
@@ -0,0 +1,5 @@
+public class ClassC extends ClassA {
+ public void print(String x, String y) {
+ System.out.println(x + " " + y);
+ }
+}
diff --git a/T5Q1/src/ClassD.java b/T5Q1/src/ClassD.java
new file mode 100644
index 0000000..6434f18
--- /dev/null
+++ b/T5Q1/src/ClassD.java
@@ -0,0 +1,5 @@
+public class ClassD extends ClassC {
+ public void print(String a, String b) {
+ System.out.println(a + " " + b);
+ }
+}
diff --git a/T5Q1/src/ClassE.java b/T5Q1/src/ClassE.java
new file mode 100644
index 0000000..89f1391
--- /dev/null
+++ b/T5Q1/src/ClassE.java
@@ -0,0 +1,5 @@
+public class ClassE extends ClassC {
+ public void print(String x) {
+ System.out.println(x);
+ }
+}
diff --git a/T5Q1/src/ClassF.java b/T5Q1/src/ClassF.java
new file mode 100644
index 0000000..cd9a8dc
--- /dev/null
+++ b/T5Q1/src/ClassF.java
@@ -0,0 +1,5 @@
+public class ClassF extends ClassE {
+ public void print(int x) {
+ System.out.println(x);
+ }
+}
diff --git a/T5Q1/src/ClassG.java b/T5Q1/src/ClassG.java
new file mode 100644
index 0000000..54221cc
--- /dev/null
+++ b/T5Q1/src/ClassG.java
@@ -0,0 +1,5 @@
+public class ClassG extends ClassF {
+ public void print(String x) {
+ System.out.println(x);
+ }
+}
diff --git a/T5Q1/src/Main.java b/T5Q1/src/Main.java
new file mode 100644
index 0000000..79c079f
--- /dev/null
+++ b/T5Q1/src/Main.java
@@ -0,0 +1,11 @@
+public class Main {
+ public static void main(String[] args) {
+ ClassF z = new ClassF();
+
+ z.print(9);
+ z.print(2, "Cx2002");
+ z.print("Object");
+ z.print("OODP", "Java");
+// z.print("OODP", 2002); // Compilation error
+ }
+}
\ No newline at end of file
diff --git a/T5Q2-A-Sol1/T5Q2-A-Sol1.iml b/T5Q2-A-Sol1/T5Q2-A-Sol1.iml
new file mode 100644
index 0000000..c90834f
--- /dev/null
+++ b/T5Q2-A-Sol1/T5Q2-A-Sol1.iml
@@ -0,0 +1,11 @@
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/T5Q2-A-Sol1/src/ClassA.java b/T5Q2-A-Sol1/src/ClassA.java
new file mode 100644
index 0000000..afa22fa
--- /dev/null
+++ b/T5Q2-A-Sol1/src/ClassA.java
@@ -0,0 +1,5 @@
+public class ClassA {
+ public void print(int x, String y) {
+ System.out.println(x + " " + y);
+ }
+}
diff --git a/T5Q2-A-Sol1/src/ClassB.java b/T5Q2-A-Sol1/src/ClassB.java
new file mode 100644
index 0000000..fcdb0c3
--- /dev/null
+++ b/T5Q2-A-Sol1/src/ClassB.java
@@ -0,0 +1,5 @@
+public class ClassB extends ClassA {
+ public void print(int x) {
+ System.out.println(x);
+ }
+}
diff --git a/T5Q2-A-Sol1/src/ClassC.java b/T5Q2-A-Sol1/src/ClassC.java
new file mode 100644
index 0000000..e1107e2
--- /dev/null
+++ b/T5Q2-A-Sol1/src/ClassC.java
@@ -0,0 +1,3 @@
+public abstract class ClassC extends ClassA {
+ public abstract void print(String x, String y);
+}
diff --git a/T5Q2-A-Sol1/src/ClassD.java b/T5Q2-A-Sol1/src/ClassD.java
new file mode 100644
index 0000000..6434f18
--- /dev/null
+++ b/T5Q2-A-Sol1/src/ClassD.java
@@ -0,0 +1,5 @@
+public class ClassD extends ClassC {
+ public void print(String a, String b) {
+ System.out.println(a + " " + b);
+ }
+}
diff --git a/T5Q2-A-Sol1/src/ClassE.java b/T5Q2-A-Sol1/src/ClassE.java
new file mode 100644
index 0000000..7a8da05
--- /dev/null
+++ b/T5Q2-A-Sol1/src/ClassE.java
@@ -0,0 +1,8 @@
+public class ClassE extends ClassC {
+ public void print(String x) {
+ System.out.println(x);
+ }
+ public void print(String x, String y) {
+ System.out.println(x + " " + y);
+ }
+}
diff --git a/T5Q2-A-Sol1/src/ClassF.java b/T5Q2-A-Sol1/src/ClassF.java
new file mode 100644
index 0000000..cd9a8dc
--- /dev/null
+++ b/T5Q2-A-Sol1/src/ClassF.java
@@ -0,0 +1,5 @@
+public class ClassF extends ClassE {
+ public void print(int x) {
+ System.out.println(x);
+ }
+}
diff --git a/T5Q2-A-Sol1/src/ClassG.java b/T5Q2-A-Sol1/src/ClassG.java
new file mode 100644
index 0000000..54221cc
--- /dev/null
+++ b/T5Q2-A-Sol1/src/ClassG.java
@@ -0,0 +1,5 @@
+public class ClassG extends ClassF {
+ public void print(String x) {
+ System.out.println(x);
+ }
+}
diff --git a/T5Q2-A-Sol1/src/Main.java b/T5Q2-A-Sol1/src/Main.java
new file mode 100644
index 0000000..be9bb2d
--- /dev/null
+++ b/T5Q2-A-Sol1/src/Main.java
@@ -0,0 +1,5 @@
+public class Main {
+ public static void main(String[] args) {
+ ClassF z = new ClassF();
+ }
+}
\ No newline at end of file
diff --git a/T5Q2-A-Sol2/T5Q2-A-Sol2.iml b/T5Q2-A-Sol2/T5Q2-A-Sol2.iml
new file mode 100644
index 0000000..c90834f
--- /dev/null
+++ b/T5Q2-A-Sol2/T5Q2-A-Sol2.iml
@@ -0,0 +1,11 @@
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/T5Q2-A-Sol2/src/ClassA.java b/T5Q2-A-Sol2/src/ClassA.java
new file mode 100644
index 0000000..afa22fa
--- /dev/null
+++ b/T5Q2-A-Sol2/src/ClassA.java
@@ -0,0 +1,5 @@
+public class ClassA {
+ public void print(int x, String y) {
+ System.out.println(x + " " + y);
+ }
+}
diff --git a/T5Q2-A-Sol2/src/ClassB.java b/T5Q2-A-Sol2/src/ClassB.java
new file mode 100644
index 0000000..fcdb0c3
--- /dev/null
+++ b/T5Q2-A-Sol2/src/ClassB.java
@@ -0,0 +1,5 @@
+public class ClassB extends ClassA {
+ public void print(int x) {
+ System.out.println(x);
+ }
+}
diff --git a/T5Q2-A-Sol2/src/ClassC.java b/T5Q2-A-Sol2/src/ClassC.java
new file mode 100644
index 0000000..e1107e2
--- /dev/null
+++ b/T5Q2-A-Sol2/src/ClassC.java
@@ -0,0 +1,3 @@
+public abstract class ClassC extends ClassA {
+ public abstract void print(String x, String y);
+}
diff --git a/T5Q2-A-Sol2/src/ClassD.java b/T5Q2-A-Sol2/src/ClassD.java
new file mode 100644
index 0000000..6434f18
--- /dev/null
+++ b/T5Q2-A-Sol2/src/ClassD.java
@@ -0,0 +1,5 @@
+public class ClassD extends ClassC {
+ public void print(String a, String b) {
+ System.out.println(a + " " + b);
+ }
+}
diff --git a/T5Q2-A-Sol2/src/ClassE.java b/T5Q2-A-Sol2/src/ClassE.java
new file mode 100644
index 0000000..baba39b
--- /dev/null
+++ b/T5Q2-A-Sol2/src/ClassE.java
@@ -0,0 +1,6 @@
+public abstract class ClassE extends ClassC {
+ public void print(String x) {
+ System.out.println(x);
+ }
+ public abstract void print(String x, String y);
+}
diff --git a/T5Q2-A-Sol2/src/ClassF.java b/T5Q2-A-Sol2/src/ClassF.java
new file mode 100644
index 0000000..1cd9000
--- /dev/null
+++ b/T5Q2-A-Sol2/src/ClassF.java
@@ -0,0 +1,8 @@
+public class ClassF extends ClassE {
+ public void print(int x) {
+ System.out.println(x);
+ }
+ public void print(String x, String y) {
+ System.out.println(x + " " + y);
+ }
+}
diff --git a/T5Q2-A-Sol2/src/ClassG.java b/T5Q2-A-Sol2/src/ClassG.java
new file mode 100644
index 0000000..215ba8b
--- /dev/null
+++ b/T5Q2-A-Sol2/src/ClassG.java
@@ -0,0 +1,8 @@
+public class ClassG extends ClassF {
+ public void print(String x) {
+ System.out.println(x);
+ }
+ public void print(String x, String y) {
+ System.out.println(x + " " + y);
+ }
+}
diff --git a/T5Q2-A-Sol2/src/Main.java b/T5Q2-A-Sol2/src/Main.java
new file mode 100644
index 0000000..f5858db
--- /dev/null
+++ b/T5Q2-A-Sol2/src/Main.java
@@ -0,0 +1,5 @@
+public class Main {
+ public static void main(String[] args) {
+
+ }
+}
\ No newline at end of file
diff --git a/T5Q2-A/T5Q2-A.iml b/T5Q2-A/T5Q2-A.iml
new file mode 100644
index 0000000..c90834f
--- /dev/null
+++ b/T5Q2-A/T5Q2-A.iml
@@ -0,0 +1,11 @@
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/T5Q2-A/src/ClassA.java b/T5Q2-A/src/ClassA.java
new file mode 100644
index 0000000..afa22fa
--- /dev/null
+++ b/T5Q2-A/src/ClassA.java
@@ -0,0 +1,5 @@
+public class ClassA {
+ public void print(int x, String y) {
+ System.out.println(x + " " + y);
+ }
+}
diff --git a/T5Q2-A/src/ClassB.java b/T5Q2-A/src/ClassB.java
new file mode 100644
index 0000000..fcdb0c3
--- /dev/null
+++ b/T5Q2-A/src/ClassB.java
@@ -0,0 +1,5 @@
+public class ClassB extends ClassA {
+ public void print(int x) {
+ System.out.println(x);
+ }
+}
diff --git a/T5Q2-A/src/ClassC.java b/T5Q2-A/src/ClassC.java
new file mode 100644
index 0000000..e1107e2
--- /dev/null
+++ b/T5Q2-A/src/ClassC.java
@@ -0,0 +1,3 @@
+public abstract class ClassC extends ClassA {
+ public abstract void print(String x, String y);
+}
diff --git a/T5Q2-A/src/ClassD.java b/T5Q2-A/src/ClassD.java
new file mode 100644
index 0000000..6434f18
--- /dev/null
+++ b/T5Q2-A/src/ClassD.java
@@ -0,0 +1,5 @@
+public class ClassD extends ClassC {
+ public void print(String a, String b) {
+ System.out.println(a + " " + b);
+ }
+}
diff --git a/T5Q2-A/src/ClassE.java b/T5Q2-A/src/ClassE.java
new file mode 100644
index 0000000..89f1391
--- /dev/null
+++ b/T5Q2-A/src/ClassE.java
@@ -0,0 +1,5 @@
+public class ClassE extends ClassC {
+ public void print(String x) {
+ System.out.println(x);
+ }
+}
diff --git a/T5Q2-A/src/ClassF.java b/T5Q2-A/src/ClassF.java
new file mode 100644
index 0000000..cd9a8dc
--- /dev/null
+++ b/T5Q2-A/src/ClassF.java
@@ -0,0 +1,5 @@
+public class ClassF extends ClassE {
+ public void print(int x) {
+ System.out.println(x);
+ }
+}
diff --git a/T5Q2-A/src/ClassG.java b/T5Q2-A/src/ClassG.java
new file mode 100644
index 0000000..54221cc
--- /dev/null
+++ b/T5Q2-A/src/ClassG.java
@@ -0,0 +1,5 @@
+public class ClassG extends ClassF {
+ public void print(String x) {
+ System.out.println(x);
+ }
+}
diff --git a/T5Q2-A/src/Main.java b/T5Q2-A/src/Main.java
new file mode 100644
index 0000000..be9bb2d
--- /dev/null
+++ b/T5Q2-A/src/Main.java
@@ -0,0 +1,5 @@
+public class Main {
+ public static void main(String[] args) {
+ ClassF z = new ClassF();
+ }
+}
\ No newline at end of file
diff --git a/T5Q2-B-FromSol1/T5Q2-B-FromSol1.iml b/T5Q2-B-FromSol1/T5Q2-B-FromSol1.iml
new file mode 100644
index 0000000..c90834f
--- /dev/null
+++ b/T5Q2-B-FromSol1/T5Q2-B-FromSol1.iml
@@ -0,0 +1,11 @@
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/T5Q2-B-FromSol1/src/ClassA.java b/T5Q2-B-FromSol1/src/ClassA.java
new file mode 100644
index 0000000..afa22fa
--- /dev/null
+++ b/T5Q2-B-FromSol1/src/ClassA.java
@@ -0,0 +1,5 @@
+public class ClassA {
+ public void print(int x, String y) {
+ System.out.println(x + " " + y);
+ }
+}
diff --git a/T5Q2-B-FromSol1/src/ClassB.java b/T5Q2-B-FromSol1/src/ClassB.java
new file mode 100644
index 0000000..fcdb0c3
--- /dev/null
+++ b/T5Q2-B-FromSol1/src/ClassB.java
@@ -0,0 +1,5 @@
+public class ClassB extends ClassA {
+ public void print(int x) {
+ System.out.println(x);
+ }
+}
diff --git a/T5Q2-B-FromSol1/src/ClassC.java b/T5Q2-B-FromSol1/src/ClassC.java
new file mode 100644
index 0000000..e1107e2
--- /dev/null
+++ b/T5Q2-B-FromSol1/src/ClassC.java
@@ -0,0 +1,3 @@
+public abstract class ClassC extends ClassA {
+ public abstract void print(String x, String y);
+}
diff --git a/T5Q2-B-FromSol1/src/ClassD.java b/T5Q2-B-FromSol1/src/ClassD.java
new file mode 100644
index 0000000..6434f18
--- /dev/null
+++ b/T5Q2-B-FromSol1/src/ClassD.java
@@ -0,0 +1,5 @@
+public class ClassD extends ClassC {
+ public void print(String a, String b) {
+ System.out.println(a + " " + b);
+ }
+}
diff --git a/T5Q2-B-FromSol1/src/ClassE.java b/T5Q2-B-FromSol1/src/ClassE.java
new file mode 100644
index 0000000..7a8da05
--- /dev/null
+++ b/T5Q2-B-FromSol1/src/ClassE.java
@@ -0,0 +1,8 @@
+public class ClassE extends ClassC {
+ public void print(String x) {
+ System.out.println(x);
+ }
+ public void print(String x, String y) {
+ System.out.println(x + " " + y);
+ }
+}
diff --git a/T5Q2-B-FromSol1/src/ClassF.java b/T5Q2-B-FromSol1/src/ClassF.java
new file mode 100644
index 0000000..80e2ce3
--- /dev/null
+++ b/T5Q2-B-FromSol1/src/ClassF.java
@@ -0,0 +1,5 @@
+public class ClassF extends ClassE {
+ public void print(int x) {
+ System.out.println(x);
+ }
+}
\ No newline at end of file
diff --git a/T5Q2-B-FromSol1/src/ClassG.java b/T5Q2-B-FromSol1/src/ClassG.java
new file mode 100644
index 0000000..54221cc
--- /dev/null
+++ b/T5Q2-B-FromSol1/src/ClassG.java
@@ -0,0 +1,5 @@
+public class ClassG extends ClassF {
+ public void print(String x) {
+ System.out.println(x);
+ }
+}
diff --git a/T5Q2-B-FromSol1/src/Main.java b/T5Q2-B-FromSol1/src/Main.java
new file mode 100644
index 0000000..42980ef
--- /dev/null
+++ b/T5Q2-B-FromSol1/src/Main.java
@@ -0,0 +1,15 @@
+public class Main {
+ public static void main(String[] args) {
+ // I - Works
+// ClassC c = new ClassD();
+// c.print("hello", "there");
+
+ // II - Does not compile because class C is abstract
+// ClassA a = new ClassC();
+// a.print(1, "there");
+
+ // III - Doesn't work - Class A does not have print(string, string) method
+// ClassA a = new ClassF();
+// a.print("hello", "there");
+ }
+}
\ No newline at end of file
diff --git a/T5Q2-B-FromSol2/T5Q2-B-FromSol2.iml b/T5Q2-B-FromSol2/T5Q2-B-FromSol2.iml
new file mode 100644
index 0000000..c90834f
--- /dev/null
+++ b/T5Q2-B-FromSol2/T5Q2-B-FromSol2.iml
@@ -0,0 +1,11 @@
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/T5Q2-B-FromSol2/src/ClassA.java b/T5Q2-B-FromSol2/src/ClassA.java
new file mode 100644
index 0000000..afa22fa
--- /dev/null
+++ b/T5Q2-B-FromSol2/src/ClassA.java
@@ -0,0 +1,5 @@
+public class ClassA {
+ public void print(int x, String y) {
+ System.out.println(x + " " + y);
+ }
+}
diff --git a/T5Q2-B-FromSol2/src/ClassB.java b/T5Q2-B-FromSol2/src/ClassB.java
new file mode 100644
index 0000000..fcdb0c3
--- /dev/null
+++ b/T5Q2-B-FromSol2/src/ClassB.java
@@ -0,0 +1,5 @@
+public class ClassB extends ClassA {
+ public void print(int x) {
+ System.out.println(x);
+ }
+}
diff --git a/T5Q2-B-FromSol2/src/ClassC.java b/T5Q2-B-FromSol2/src/ClassC.java
new file mode 100644
index 0000000..e1107e2
--- /dev/null
+++ b/T5Q2-B-FromSol2/src/ClassC.java
@@ -0,0 +1,3 @@
+public abstract class ClassC extends ClassA {
+ public abstract void print(String x, String y);
+}
diff --git a/T5Q2-B-FromSol2/src/ClassD.java b/T5Q2-B-FromSol2/src/ClassD.java
new file mode 100644
index 0000000..6434f18
--- /dev/null
+++ b/T5Q2-B-FromSol2/src/ClassD.java
@@ -0,0 +1,5 @@
+public class ClassD extends ClassC {
+ public void print(String a, String b) {
+ System.out.println(a + " " + b);
+ }
+}
diff --git a/T5Q2-B-FromSol2/src/ClassE.java b/T5Q2-B-FromSol2/src/ClassE.java
new file mode 100644
index 0000000..baba39b
--- /dev/null
+++ b/T5Q2-B-FromSol2/src/ClassE.java
@@ -0,0 +1,6 @@
+public abstract class ClassE extends ClassC {
+ public void print(String x) {
+ System.out.println(x);
+ }
+ public abstract void print(String x, String y);
+}
diff --git a/T5Q2-B-FromSol2/src/ClassF.java b/T5Q2-B-FromSol2/src/ClassF.java
new file mode 100644
index 0000000..1cd9000
--- /dev/null
+++ b/T5Q2-B-FromSol2/src/ClassF.java
@@ -0,0 +1,8 @@
+public class ClassF extends ClassE {
+ public void print(int x) {
+ System.out.println(x);
+ }
+ public void print(String x, String y) {
+ System.out.println(x + " " + y);
+ }
+}
diff --git a/T5Q2-B-FromSol2/src/ClassG.java b/T5Q2-B-FromSol2/src/ClassG.java
new file mode 100644
index 0000000..215ba8b
--- /dev/null
+++ b/T5Q2-B-FromSol2/src/ClassG.java
@@ -0,0 +1,8 @@
+public class ClassG extends ClassF {
+ public void print(String x) {
+ System.out.println(x);
+ }
+ public void print(String x, String y) {
+ System.out.println(x + " " + y);
+ }
+}
diff --git a/T5Q2-B-FromSol2/src/Main.java b/T5Q2-B-FromSol2/src/Main.java
new file mode 100644
index 0000000..5380632
--- /dev/null
+++ b/T5Q2-B-FromSol2/src/Main.java
@@ -0,0 +1,15 @@
+public class Main {
+ public static void main(String[] args) {
+ // I - Works
+ ClassC c = new ClassD();
+ c.print("hello", "there");
+
+ // II - Does not compile because class C is abstract
+// ClassA a = new ClassC();
+// a.print(1, "there")
+
+ // III - Works
+ ClassF a = new ClassF();
+ a.print("hello", "there");
+ }
+}
\ No newline at end of file
diff --git a/T5Q2-C/T5Q2-C.iml b/T5Q2-C/T5Q2-C.iml
new file mode 100644
index 0000000..c90834f
--- /dev/null
+++ b/T5Q2-C/T5Q2-C.iml
@@ -0,0 +1,11 @@
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/T5Q2-C/src/ClassA.java b/T5Q2-C/src/ClassA.java
new file mode 100644
index 0000000..afa22fa
--- /dev/null
+++ b/T5Q2-C/src/ClassA.java
@@ -0,0 +1,5 @@
+public class ClassA {
+ public void print(int x, String y) {
+ System.out.println(x + " " + y);
+ }
+}
diff --git a/T5Q2-C/src/ClassB.java b/T5Q2-C/src/ClassB.java
new file mode 100644
index 0000000..fcdb0c3
--- /dev/null
+++ b/T5Q2-C/src/ClassB.java
@@ -0,0 +1,5 @@
+public class ClassB extends ClassA {
+ public void print(int x) {
+ System.out.println(x);
+ }
+}
diff --git a/T5Q2-C/src/ClassC.java b/T5Q2-C/src/ClassC.java
new file mode 100644
index 0000000..a1fdca0
--- /dev/null
+++ b/T5Q2-C/src/ClassC.java
@@ -0,0 +1,5 @@
+public class ClassC extends ClassA {
+ public void print(String x, String y) {
+ System.out.println(x + " " + y);
+ }
+}
diff --git a/T5Q2-C/src/ClassD.java b/T5Q2-C/src/ClassD.java
new file mode 100644
index 0000000..6434f18
--- /dev/null
+++ b/T5Q2-C/src/ClassD.java
@@ -0,0 +1,5 @@
+public class ClassD extends ClassC {
+ public void print(String a, String b) {
+ System.out.println(a + " " + b);
+ }
+}
diff --git a/T5Q2-C/src/ClassE.java b/T5Q2-C/src/ClassE.java
new file mode 100644
index 0000000..89f1391
--- /dev/null
+++ b/T5Q2-C/src/ClassE.java
@@ -0,0 +1,5 @@
+public class ClassE extends ClassC {
+ public void print(String x) {
+ System.out.println(x);
+ }
+}
diff --git a/T5Q2-C/src/ClassF.java b/T5Q2-C/src/ClassF.java
new file mode 100644
index 0000000..cd9a8dc
--- /dev/null
+++ b/T5Q2-C/src/ClassF.java
@@ -0,0 +1,5 @@
+public class ClassF extends ClassE {
+ public void print(int x) {
+ System.out.println(x);
+ }
+}
diff --git a/T5Q2-C/src/ClassG.java b/T5Q2-C/src/ClassG.java
new file mode 100644
index 0000000..54221cc
--- /dev/null
+++ b/T5Q2-C/src/ClassG.java
@@ -0,0 +1,5 @@
+public class ClassG extends ClassF {
+ public void print(String x) {
+ System.out.println(x);
+ }
+}
diff --git a/T5Q2-C/src/Main.java b/T5Q2-C/src/Main.java
new file mode 100644
index 0000000..45741c6
--- /dev/null
+++ b/T5Q2-C/src/Main.java
@@ -0,0 +1,32 @@
+public class Main {
+ public static void main(String[] args) {
+ // I - Doesn't work because downcast needs to be explicitly declared
+// ClassC c = new ClassD();
+// ClassE e = c;
+
+ // II - Can´t upcast because they are from different family branches
+// ClassB b = new ClassE();
+// b.print("hello");
+
+ // III
+// ClassA a = new ClassF(); // Ok
+// a.print(12, "there"); // Ok
+// a.print(88); // Compilation error
+
+ // IV -
+// ClassA a = new ClassC(); // Ok
+// ClassG g = (ClassG)a; // Runtime error
+// g.print("hello");
+
+
+ // V - We lost track of the print(string, string) in C become it become a A first
+// ClassA a = new ClassC(); // ok
+// ClassG g = (ClassG)a; // Runtime error
+// g.print("hello", "there");
+
+ // VI
+// ClassA a = new ClassF(); // OK
+// ClassC f = (ClassC)a; // Ok
+// f.print(88, "there"); // Ok
+ }
+}
\ No newline at end of file
diff --git a/T5Q2-Marcus/T5Q2-Marcus.iml b/T5Q2-Marcus/T5Q2-Marcus.iml
new file mode 100644
index 0000000..c90834f
--- /dev/null
+++ b/T5Q2-Marcus/T5Q2-Marcus.iml
@@ -0,0 +1,11 @@
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/T5Q2-Marcus/src/ClassA.java b/T5Q2-Marcus/src/ClassA.java
new file mode 100644
index 0000000..754836c
--- /dev/null
+++ b/T5Q2-Marcus/src/ClassA.java
@@ -0,0 +1,9 @@
+public class ClassA {
+ public void method1() {
+ System.out.println("ClassA.method1");
+ }
+
+ public void method2() {
+ System.out.println("ClassA.method2");
+ }
+}
diff --git a/T5Q2-Marcus/src/ClassB.java b/T5Q2-Marcus/src/ClassB.java
new file mode 100644
index 0000000..5515d18
--- /dev/null
+++ b/T5Q2-Marcus/src/ClassB.java
@@ -0,0 +1,9 @@
+public class ClassB extends ClassA {
+ public void method2() {
+ System.out.println("ClassB.method2");
+ }
+
+ public void method3() {
+ System.out.println("ClassB.method3");
+ }
+}
diff --git a/T5Q2-Marcus/src/ClassC.java b/T5Q2-Marcus/src/ClassC.java
new file mode 100644
index 0000000..9f4f167
--- /dev/null
+++ b/T5Q2-Marcus/src/ClassC.java
@@ -0,0 +1,9 @@
+public class ClassC extends ClassB {
+ public void method3() {
+ System.out.println("ClassC.method3");
+ }
+
+ public void method4() {
+ System.out.println("ClassC.method4");
+ }
+}
diff --git a/T5Q2-Marcus/src/Main.java b/T5Q2-Marcus/src/Main.java
new file mode 100644
index 0000000..f764a31
--- /dev/null
+++ b/T5Q2-Marcus/src/Main.java
@@ -0,0 +1,25 @@
+public class Main {
+ public static void main(String[] args) {
+ // I
+// ClassA a = new ClassB();
+// ClassB b = (ClassB) a;
+// b.method2(); // ClassB.method2
+// b.method1(); // ClassA.method1
+
+ // II
+// ClassA c = new ClassB();
+// ClassC d = (ClassC) c; // Runtime error here
+// d.method3(); // Never executed
+
+ // III
+// ClassA e = new ClassC();
+// ClassB f = (ClassB) e;
+// f.method3(); // ClassC.method3
+// f.method2(); // ClassB.method2
+// f.method1(); // ClassA.method1
+
+ // IV
+// ClassC g = (ClassC) new ClassA(); // Runtime error
+// g.method1(); // never executed
+ }
+}
\ No newline at end of file
diff --git a/T5Q3/T5Q3.iml b/T5Q3/T5Q3.iml
new file mode 100644
index 0000000..c90834f
--- /dev/null
+++ b/T5Q3/T5Q3.iml
@@ -0,0 +1,11 @@
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/T5Q3/src/Polygon.java b/T5Q3/src/Polygon.java
new file mode 100644
index 0000000..2201a75
--- /dev/null
+++ b/T5Q3/src/Polygon.java
@@ -0,0 +1,73 @@
+//public abstract class Polygon {
+public class Polygon {
+ public enum KindofPolygon {
+ POLY_PLAIN,
+ POLY_RECT,
+ POLY_TRIANG
+ };
+ protected String name;
+ protected float width;
+ protected float height;
+ protected KindofPolygon polytype;
+
+ public Polygon(String theName, float theWidth, float theHeight) {
+ name = theName;
+ width = theWidth;
+ height = theHeight;
+ polytype = KindofPolygon.POLY_PLAIN;
+ }
+
+ public KindofPolygon getPolytype() {
+ return polytype;
+ }
+
+ public void setPolytype(KindofPolygon value) {
+ polytype = value;
+ }
+
+ public String getName() {
+ return name;
+ }
+
+ public float calArea() {
+ return 0;
+ }
+
+ public void printWidthHeight( ) {
+ System.out.println("Width = " + width + " Height = " + height);
+ }
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+// public abstract float calArea();
+
+}
\ No newline at end of file
diff --git a/T5Q3/src/Rectangle.java b/T5Q3/src/Rectangle.java
new file mode 100644
index 0000000..82a36bf
--- /dev/null
+++ b/T5Q3/src/Rectangle.java
@@ -0,0 +1,10 @@
+public class Rectangle extends Polygon {
+ public Rectangle(String theName, float theWidth, float theHeight) {
+ super(theName, theWidth, theHeight) ;
+ this.polytype = KindofPolygon.POLY_RECT;
+ }
+
+ public float calArea() {
+ return width * height;
+ }
+}
diff --git a/T5Q3/src/TestPolygon.java b/T5Q3/src/TestPolygon.java
new file mode 100644
index 0000000..ab056ff
--- /dev/null
+++ b/T5Q3/src/TestPolygon.java
@@ -0,0 +1,77 @@
+public class TestPolygon {
+ public static void printArea(Rectangle rect) {
+ float area = rect.calArea();
+ System.out.println("The area of the " + rect.getPolytype() + " is " + area);
+ }
+
+ public static void printArea(Triangle tri) {
+ float area = tri.calArea();
+ System.out.println("The area of the " + tri.getPolytype() + " is " + area);
+ }
+
+ public static void main(String[] args ) {
+
+ Rectangle rect = new Rectangle("Rectangle", 3.0f, 4.0f);
+ printArea(rect); // static binding
+ rect.printWidthHeight();
+
+ Triangle triangle= new Triangle("Triangle", 3.0f, 4.0f);
+ printArea(triangle); // static binding
+ triangle.printWidthHeight();
+ }
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ public static void printArea(Polygon poly) {
+ float area = poly.calArea( );
+ System.out.println("The area of the " + poly.getPolytype() + " is " + area);
+ }
+
+ public static void main2(String[] args ) {
+
+ Rectangle rect = new Rectangle("Rectangle", 3.0f, 4.0f);
+ printArea(rect); // dynamic binding
+ rect.printWidthHeight();
+
+ Triangle triangle= new Triangle("Triangle", 3.0f, 4.0f);
+ printArea(triangle); // dynamic binding
+ triangle.printWidthHeight();
+ }
+}
\ No newline at end of file
diff --git a/T5Q3/src/Triangle.java b/T5Q3/src/Triangle.java
new file mode 100644
index 0000000..b5e6b49
--- /dev/null
+++ b/T5Q3/src/Triangle.java
@@ -0,0 +1,10 @@
+public class Triangle extends Polygon {
+ public Triangle (String theName, float theWidth, float theHeight) {
+ super(theName, theWidth, theHeight) ;
+ this.polytype = KindofPolygon.POLY_TRIANG;
+ }
+
+ public float calArea() {
+ return 0.5f * width * height;
+ }
+}