Problem 1 20 Points

CS 1302 – HW 5

This homework has 2 problems which deal with abstract classes, interfaces, Cloneable and Comparable (Ch 13)

Problem 1 – 20 Points

Create a Java Project in Eclipse with the name: hw5_lastName
Create a package named prob1 and write the classes indicated below.

(Read – no action required) For this problem, you will start with the incomplete class below. You will modify itand then write several subclasses as described below.

publicabstractclass Cake {

private String cakeMix;

public Cake(String cakeMix) {

this.cakeMix = cakeMix;

}

public String makeCake() {

String cake = "";

cake += blend();

cake += pour();

cake += bake();

returncake;

}

public String bake() {

return"Bake at 350 degrees F 30 minutes";

}

public String getCakeMix() {

returncakeMix;

}

private String blend() {

String cake = "Blend:(";

cake += getCakeMix() + ", ";

cake += getLiquid() + ", ";

cake += getOil() + ", ";

cake += getEggs() + ")\n";

returncake;

}

public String pour() {

return"Pour mix into pan\n";

}

Create a Cake class in your prob1 folder and copy the code above. It will have compile errors.

Modify the Cake class as follows:

The makeCake and blend methods can not be overridden. Thus, modify them appropriately.
Add three abstract methods: getLiquid, getOil, getEggs. These methods do not accept an arguments and theyall return a string. The Cake class should now compile.

Create a ClassicYellowCake class that is a subclass of Cake that accepts a cake mix and use 1 cup tap water for the liquid, 1/3 cup vegetable oil for the oil, and 3 large eggs for the eggs. For example, getLiquid should be overridden to return, “1 cup tap water”. Similar for the other methods.

Create a CakeDriver class and use this code in main to test ClassicYellowCake:

Cake classicYellow = new ClassicYellowCake("Duncan Hines Classic Yellow Cake Mix");

System.out.println("Classic Yellow Cake");

System.out.println("------");

System.out.println(classicYellow.makeCake());

Which should produce this output:

Classic Yellow Cake

------

Blend:(Duncan Hines Classic Yellow Cake Mix, 1 cup tap water, 1/3 cup vegetable oil, 3 large eggs)

Pour mix into pan

Bake at 350 degrees F 30 minutes

Create a HighAltitudeClassicYellowCakeclass that is a subclass of ClassicYellowCake that accepts a cake mix. This cake uses the same liquid, oil, and eggs as a ClassicYellowCake; however, you add 2 tbs flour to the cake mix (Hint: override getCakeMix which should call the superclass getCakeMix and add 2 tbs flour to it). Finally, it needs to bake at 375 degrees F for 26 minutes (Hint: override the bake method).

Add this test code to main in CakeDriver:

Cake highAltitudeClassicYellow = new HighAltitudeClassicYellowCake("Duncan Hines Classic Yellow Cake Mix");

System.out.println("\nHigh Altitude Classic Yellow Cake");

System.out.println("------");

System.out.println(highAltitudeClassicYellow.makeCake());

Which should produce this output:

High Altitude Classic Yellow Cake

------

Blend:(Duncan Hines Classic Yellow Cake Mix + 2 tbs flour, 1 cup tap water, 1/3 cup vegetable oil, 3 large eggs)

Pour mix into pan

Bake at 375 degrees F 26 minutes

Create an OrganicCakeclass that is a subclass of Cake that accepts a cake mix and use 1 ¼ cup milk for the liquid, 1/2 cup canola oil for the oil, and 2 large eggs for the eggs.

Add this test code to main in CakeDriver:

Cake organicVanilla = new OrganicCake("Organic Vanilla Cake Mix");

System.out.println("\nOrganic Vanilla Cake");

System.out.println("------");

System.out.println(organicVanilla.makeCake());

Which should produce this output:

Organic Vanilla Cake

------

Blend:(Organic Vanilla Cake Mix, 1 1/4 cup milk, 1/2 cup canola oil, 2 large eggs)

Pour mix into pan

Bake at 350 degrees F 30 minutes

Problem 2 – 80 Points

Create a package named prob2and write the classes indicated below.

(Read – no action required) Consider the class diagram shown below. You will write all six classes/interfaces (Martian, GreenMartian, RedMartian, MartianManager, Teleporter, MartianTester) as described below.

(Read – no action required) – I suggest you write the classes and methods in the order presented below. You should test each method as you complete it. You might also look ahead to see the test code you are required to write in MartianTester and possibly write that as you go along.

Martian Class:

Member / Description
Martian(id:int) / Creates a Martian with an id and sets the volume to 1.
clone():object / Creates and returns a clone of the martian.
compareTo(Martian m):int / Implements Java’s compareTo so that Martians (either red or green) are compared based on their id’s which results in the usual ascending sorted order.
equals(o:Object):bool / Two martians are equal if their id’s are equal, regardless of whether they are green or 4ed.
getId():int / Returns the id.
getVolume():int / Returns the volume.
setVolume(level:int) / Sets the volume to level.
speak():string / Abstract.
toString():string / Returns a string like: “id=xxx, vol=yyy”, where xxx is the id and yyy is the volume.

RedMartian Class:

Member / Description
speak():string / Returns a string like: “id=xxx, Rubldy Rock”, where xxx is the id.
toString():string / Returns a string like: “Red Martian - id=xxx, vol=yyy”, where xxx is the id and yyy is the volume.

Write the Teleporter interface.

GreenMartian Class:

Member / Description
speak():string / Returns a string like: “id=xxx, Grobldy Grock”, where xxx is the id.
teleport(dest:string):string / The GreenMartian implements the teleport method by returning a string like this: “id=xxx teleporting to dest”.
toString():string / Returns a string like: “Green martian - id=xxx, vol=yyy”, where xxx is the id and yyy is the volume.

Add a MartianTester class and a main. Write code for the following tests as described.

// Test 0–Create MartianManager and create some red and green martians

// to be used in tests that follow.

// Test 1 - Martian.toString()

// Test 2 - Martian.equals()

// Test 3 - Martian.compareTo()

// Test 4 - Martian.clone()

MartianManager Class:

Member / Description
martians / A list Martian objects.
teleporters / A list of Teleporter objects.
addMartian(m:Martian):boolean / Adds m(either red or green) to martians, only when it doesn’t already exist in the list of martians. Remember, martians are the same (no matter if red or green if they have the same id. Hint: use the contains method which will work because you overrode the equals method in the Martian class). If m is a GreenMartian(and unique, i.e. doesn’t already exist, as described above), then it is also added to the teleporters list. If the add is successful, then return true, otherwise return false.