1-Assume that the Plant class looks like the following:
public abstract class Plant {
private int age=0;
private int height=0;
public int getAge() {
return age;
}
public void addYearToAge() {
age++;
}
public int getHeight() {
return height;
}
public void setHeight(int height) {
this.height = height;
}
abstract public void doSpring();
abstract public void doSummer();
abstract public void doFall();
abstract public void doWinter();
}
2- Assume that the MapleTree class looks like the following:
public class MapleTree extends Plant {
private static final int AMOUNT_TO_
GROW_I_ONE_GROWING_SEASON = 2;
// A tree grows upwards a certain number of feet a year.A tree does not die down to ground level during the winter. //
private void grow() {
int currentHeight = getHeight();
setHeight(currentHeight + AMOUNT_TO_GROW_IN_ONE_GROWING_SEASON);
}
public void doSpring() {
grow();
addYearToAge();
System.out.println("Spring: The maple tree is starting to grow " + "leaves and new branches");
System.out.println("\t Current Age: " + getAge() + " " +"Current Height: " + getHeight());
}
public void doSummer() {
grow();
System.out.println("Summer: The maple tree is continuing to grow");
System.out.println("\t Current Age: " + getAge() + " " +"Current Height: " + getHeight());
}
public void doFall() {
System.out.println("Fall: The maple tree has stopped growing and is losing its leaves");
System.out.println("\t Current Age: " + getAge() + " " + "Current Height: " + getHeight());
}
public void doWinter() {
System.out.println("Winter: The maple tree is dormant");
System.out.println("\t Current Age: " + getAge() + " " +"Current Height: " + getHeight());
}
}
3- Assume that the class Tulip looks like:
public class Tulip extends Plant {
// A tulip grows each year to the same height. During the winter they die down to ground level.//
private void grow() {
int currentHeight = getHeight();
setHeight(currentHeight + AMOUNT_TO_GROW_IN_ONE_GROWING_SEASON);
}
private void dieDownForWinter(){
setHeight(0);
}
public void doSpring() {
grow();
addYearToAge();
System.out.println("Spring: The tulip is starting to grow " +"up from the ground");
System.out.println("\t Current Age: " + getAge() + " " +"Current Height: " + getHeight());
}
public void doSummer() {
System.out.println("Summer: The tulip has stopped growing " +"and is flowering");
System.out.println("\t Current Age: " + getAge() + " " + "Current Height: " + getHeight());
}
public void doFall() {
System.out.println("Fall: The tulip begins to wilt");
System.out.println("\t Current Age: " + getAge() + " " +"Current Height: " + getHeight());
}
public void doWinter() {
dieDownForWinter();
System.out.println("Winter: The tulip is dormant underground");
System.out.println("\t Current Age: " + getAge() + " " + "Current Height: " + getHeight());}
}
This exercise will use the previous classes and add new functionality to it.
Creating a maple tree and tulip and a rose...
Entering a loop to simulate 3 years
Spring: The maple tree is starting to grow leaves and new branches
Current Age: 1 Current Height: 2
Spring: The tulip is starting to grow up from the ground
Current Age: 1 Current Height: 1
Spring: The rose is starting to grow up from the ground
Current Age: 1 Current Height: 1
Summer: The maple tree is continuing to grow
Current Age: 1 Current Height: 4
Summer: The tulip has stopped growing and is flowering
Current Age: 1 Current Height: 1
Summer: The rose has stopped growing and is flowering
Current Age: 1 Current Height: 1
Fall: The maple tree has stopped growing and is losing its leaves
Current Age: 1 Current Height: 4
Fall: The tulip begins to wilt
Current Age: 1 Current Height: 1
Fall: The rose begins to wilt
Current Age: 1 Current Height: 1
Winter: The maple tree is dormant
Current Age: 1 Current Height: 4
Winter: The tulip is dormant underground
Current Age: 1 Current Height: 0
Winter: The rose is dormant underground
Current Age: 1 Current Height: 0
Spring: The maple tree is starting to grow leaves and new branches
Current Age: 2 Current Height: 6
Spring: The tulip is start
ing to grow up from the ground
Current Age: 2 Current Height: 1
Spring: The rose is starting to grow up from the ground
Current Age: 2 Current Height: 1
Summer: The maple tree is continuing to grow
Current Age: 2 Current Height: 8
Summer: The tulip has stopped growing and is flowering
Current Age: 2 Current Height: 1
Summer: The rose has stopped growing and is flowering
Current Age: 2 Current Height: 1
Fall: The maple tree has stopped growing and is losing its leaves
Current Age: 2 Current Height: 8
Fall: The tulip begins to wilt
Current Age: 2 Current Height: 1
Fall: The rose begins to wilt
Current Age: 2 Current Height: 1
Winter: The maple tree is dormant
Current Age: 2 Current Height: 8
Winter: The tulip is dormant underground
Current Age: 2 Current Height: 0
Winter: The rose is dormant underground
Current Age: 2 Current Height: 0
Spring: The maple tree is starting to grow leaves and new branches
Current Age: 3 Current Height: 10
Spring: The tulip is starting to grow up from the ground
Current Age: 3 Current Height: 1
Spring: The rose is starting to grow up from the ground
Current Age: 3 Current Height: 1
Summer: The maple tree is continuing to grow
Current Age: 3 Current Height: 12
Summer: The tulip has stopped growing and is flowering
Current Age: 3 Current Height: 1
Summer: The rose has stopped growing and is flowering
Current Age: 3 Current Height: 1
Fall: The maple tree has stopped growing and is losing its leaves
Current Age: 3 Current Height: 12
Fall: The tulip begins to wilt
Current Age: 3 Current Height: 1
Fall: The rose begins to wilt
Current Age: 3 Current Height: 1
Winter: The maple tree is dormant
Current Age: 3 Current Height: 12
Winter: The tulip is dormant underground
Current Age: 3 Current Height: 0
Winter: The rose is dormant underground
Current Age: 3 Current Height: 0
NOTE:-
1) Save the files with respective names given and run the Simulator.java file for simulation. Save files as it is provided in answers in 5 different class files and then only run Simulator.
2) Don't forget to upvote. Ask in comment section for any doubts.
CODE(IMAGES):-
1) Plant.java

2) MapleTree.java: -

3) Tulip.java

4) Rose.java: -

5) Simulator.java

CODE(TEXT): -
1) Plant.java
public abstract class Plant {
private int age=0;
private int height=0;
public int getAge() {
return age;
}
public void addYearToAge() {
age++;
}
public int getHeight() {
return height;
}
public void setHeight(int height) {
this.height = height;
}
abstract public void doSpring();
abstract public void doSummer();
abstract public void doFall();
abstract public void doWinter();
}
2) MapleTree.java
public class MapleTree extends Plant {
private static final int
AMOUNT_TO_GROW_IN_ONE_GROWING_SEASON = 2;
// A tree grows upwards a certain number of feet a year.A tree does not die down to ground level during the winter. //
private void grow() {
int currentHeight =
getHeight();
setHeight(currentHeight +
AMOUNT_TO_GROW_IN_ONE_GROWING_SEASON);
}
public void doSpring() {
grow();
addYearToAge();
System.out.println("Spring: The
maple tree is starting to grow " + "leaves and new
branches");
System.out.println("\t Current Age:
" + getAge() + " " +"Current Height: " + getHeight());
}
public void doSummer() {
grow();
System.out.println("Summer: The
maple tree is continuing to grow");
System.out.println("\t Current Age:
" + getAge() + " " +"Current Height: " + getHeight());
}
public void doFall() {
System.out.println("Fall: The maple
tree has stopped growing and is losing its leaves");
System.out.println("\t Current Age:
" + getAge() + " " + "Current Height: " + getHeight());
}
public void doWinter() {
System.out.println("Winter: The
maple tree is dormant");
System.out.println("\t Current Age:
" + getAge() + " " +"Current Height: " + getHeight());
}
}
3) Tulip.java
public class Tulip extends Plant {
// A tulip grows each year to the same height. During
the winter they die down to ground level.//
private static final int
AMOUNT_TO_GROW_IN_ONE_GROWING_SEASON = 1;
private void grow() {
int currentHeight =
getHeight();
setHeight(currentHeight +
AMOUNT_TO_GROW_IN_ONE_GROWING_SEASON);
}
private void dieDownForWinter(){
setHeight(0);
}
public void doSpring() {
grow();
addYearToAge();
System.out.println("Spring: The
tulip is starting to grow " +"up from the ground");
System.out.println("\t Current Age:
" + getAge() + " " +"Current Height: " + getHeight());
}
public void doSummer() {
System.out.println("Summer: The
tulip has stopped growing " +"and is flowering");
System.out.println("\t Current Age:
" + getAge() + " " + "Current Height: " + getHeight());
}
public void doFall() {
System.out.println("Fall: The tulip
begins to wilt");
System.out.println("\t Current Age:
" + getAge() + " " +"Current Height: " + getHeight());
}
public void doWinter() {
dieDownForWinter();
System.out.println("Winter: The
tulip is dormant underground");
System.out.println("\t Current Age:
" + getAge() + " " + "Current Height: " + getHeight());
}
}
4) Rose.java
public class Rose extends Plant {
// nearly same as Tulip
private static final int
AMOUNT_TO_GROW_IN_ONE_GROWING_SEASON = 1;
private void grow() {
int currentHeight =
getHeight();
setHeight(currentHeight +
AMOUNT_TO_GROW_IN_ONE_GROWING_SEASON);
}
private void dieDownForWinter(){
setHeight(0);
}
public void doSpring() {
grow();
addYearToAge();
System.out.println("Spring: The
rose is starting to grow " +"up from the ground");
System.out.println("\t Current Age:
" + getAge() + " " +"Current Height: " + getHeight());
}
public void doSummer() {
System.out.println("Summer: The
rose has stopped growing " +"and is flowering");
System.out.println("\t Current Age:
" + getAge() + " " + "Current Height: " + getHeight());
}
public void doFall() {
System.out.println("Fall: The rose
begins to wilt");
System.out.println("\t Current Age:
" + getAge() + " " +"Current Height: " + getHeight());
}
public void doWinter() {
dieDownForWinter();
System.out.println("Winter: The
rose is dormant underground");
System.out.println("\t Current Age:
" + getAge() + " " + "Current Height: " + getHeight());
}
}
5) Simulator.java
public class Simulator // for simulationg all plant
objects
{
public static void main(String[] args) // main
function
{
System.out.println("Creating a
maple tree and tulip and a rose...");
MapleTree mapleObj = new
MapleTree();
Rose roseObj = new Rose();
Tulip tulipObj = new Tulip();
System.out.println("Entering a
loop to simulate 3 years");
for(int i = 0; i < 3; i++) //
loops for 3 times
{
mapleObj.doSpring();
tulipObj.doSpring(); // call for spring
roseObj.doSpring();
mapleObj.doSummer();
tulipObj.doSummer(); // call for summer
roseObj.doSummer();
mapleObj.doFall();
tulipObj.doFall(); // call for fall
roseObj.doFall();
mapleObj.doWinter();
tulipObj.doWinter(); // call for winter
roseObj.doWinter();
}
}
}
SAMPLE OUTPUT: -


1-Assume that the Plant class looks like the following: public abstract class Plant { private int...
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Person Class:
public class Person extends Passenger{
private int numOffspring;
public Person() {
this.numOffspring = 0;
}
public Person (int numOffspring) {
this.numOffspring = numOffspring;
}
public Person(String name, int birthYear, double weight, double
height, char gender, int numCarryOn, int numOffspring)
{
super(name, birthYear, weight, height, gender,
numCarryOn);
if(numOffspring < 0) {
this.numOffspring = 0;
}
this.numOffspring = numOffspring;
}
public int getNumOffspring() {
...
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