Can anyone solve this for me using java programming language? Exercise: A planet

Question

Can anyone solve this for me using java programming language?

Exercise:

A planet has a name, an orbit, a diameter and a mass. Define a class called Planet, and provide required constructors, accessor and mutator methods. Override the following methods that are defined in the Object class

equals method that checks reference equality and returns a boolean value

clone method that creates a copy of an object and returns it

toString() method that returns a string containing object details

Develop a driver class to do the following

1.Creates an array planets using the values provided in the file input.txt. Each line of the text represent name, orbit(distance from the sun) , diameter and mass

2. Print the name of the heaviest planet

3. Print name of the farthest planet from Sun

4. Create a clone of a planet

5. Check if two planets are equal

6. Print details of all planets ( by invoking toString() method implicitly)

Sample input(planet.txt):

Mercury 57910000.0 4880.0 3.30e23

Venus 108200000.0 12103.6 4.869e24

Earth 149600000.0 12756.3 5.972e24

Mars 227940000.0 6794.0 6.4219e23

Jupiter 778330000.0 142984 1.900e27

Saturn 1429400000.0 120536 5.68e26

Uranus 2870990000.0 51118.0 8.683e25

Neptune 4504000000.0 49532.0 1.0247e26

Pluto 5913520000.0 2274.0 1.27e22

Explanation / Answer

Given below is the code for the question. To indent the code in eclipse, in the file press Ctrl +A and then Ctrl + i

Hope the answer helps. If it did, please don't forget to rate the answer. Thank you.

Planet.java
public class Planet{
private String name;
private double orbit;
private double diameter;
private double mass;
public Planet(){

}
public Planet(String name, double orb, double dia, double mass)
{
this.name = name;
this.orbit = orb;
this.diameter = dia;
this.mass = mass;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getOrbit() {
return orbit;
}
public void setOrbit(double orbit) {
this.orbit = orbit;
}
public double getDiameter() {
return diameter;
}
public void setDiameter(double diameter) {
this.diameter = diameter;
}
public double getMass() {
return mass;
}
public void setMass(double mass) {
this.mass = mass;
}
//override toString
@Override
public String toString()
{
String str = "";
str += "Name: " + name +" ";
str += "Orbit: " + orbit + " ";
str += "Diameter: " + diameter + " ";
str += "Mass: " + mass + " ";
return str;
}
@Override
public boolean equals(Object obj)
{
if(obj instanceof Planet)
{
Planet p2 = (Planet)obj;
if(p2.name == name && p2.orbit == orbit
&& p2.diameter == diameter && p2.mass == mass)
return true;
else
return false;
}
else
return false;
}
@Override
protected Object clone() throws CloneNotSupportedException {
return new Planet(name, orbit, diameter, mass);
}
}

PlanetDriver.java

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
public class PlanetDriver {
public static void main(String[] args) {
String filename = "planets.txt";
int count = 0;
try {
Scanner inFile = new Scanner(new File(filename));
//create an array of planets
Planet[] planets = new Planet[9]; //an array of 9 planets
while(inFile.hasNext())
{
String name = inFile.next();
double orbit = inFile.nextDouble();
double diameter = inFile.nextDouble();
double mass = inFile.nextDouble();
planets[count] = new Planet(name, orbit, diameter, mass);
count++;
}
inFile.close();
//find the heaviest and farthest planets
int indexOfHeaviest = 0;
int indexOfFarthest = 0;
for(int i = 0; i < count; i++)
{
//check if this heavier
if(planets[i].getMass() > planets[indexOfHeaviest].getMass())
indexOfHeaviest = i;
//check if this is farther
if(planets[i].getOrbit() > planets[indexOfFarthest].getOrbit())
indexOfFarthest = i;
}
System.out.println("The heaviest planet is " + " " + planets[indexOfHeaviest]);
System.out.println("The farthest planet is " + " " + planets[indexOfFarthest]);
Planet clone = (Planet)(planets[0].clone());
if(clone.equals(planets[0]))
System.out.println("clone is equal to planet 0 (" + planets[0].getName() + ")");
else
System.out.println("clone is NOT equal to planet 0 (" + planets[0].getName() + ")");
if(clone.equals(planets[1]))
System.out.println("clone is equal to planet 1 (" + planets[1].getName() + ")");
else
System.out.println("clone is NOT equal to planet 1 (" + planets[1].getName() + ")");
//displaying all planets
System.out.println(" Displaying all planets");
for(int i = 0; i < count; i++)
System.out.println(planets[i]);
} catch (FileNotFoundException e) {
System.out.println(e.getMessage());
} catch (CloneNotSupportedException e) {
System.out.println(e.getMessage());
}
}
}

ouput

The heaviest planet is
Name: Jupiter
Orbit: 7.7833E8
Diameter: 142984.0
Mass: 1.9E27

The farthest planet is
Name: Pluto
Orbit: 5.91352E9
Diameter: 2274.0
Mass: 1.2700000000000001E22

clone is equal to planet 0 (Mercury)
clone is NOT equal to planet 1 (Venus)

Displaying all planets
Name: Mercury
Orbit: 5.791E7
Diameter: 4880.0
Mass: 3.3E23

Name: Venus
Orbit: 1.082E8
Diameter: 12103.6
Mass: 4.869E24

Name: Earth
Orbit: 1.496E8
Diameter: 12756.3
Mass: 5.972E24

Name: Mars
Orbit: 2.2794E8
Diameter: 6794.0
Mass: 6.4219E23

Name: Jupiter
Orbit: 7.7833E8
Diameter: 142984.0
Mass: 1.9E27

Name: Saturn
Orbit: 1.4294E9
Diameter: 120536.0
Mass: 5.68E26

Name: Uranus
Orbit: 2.87099E9
Diameter: 51118.0
Mass: 8.683E25

Name: Neptune
Orbit: 4.504E9
Diameter: 49532.0
Mass: 1.0247E26

Name: Pluto
Orbit: 5.91352E9
Diameter: 2274.0
Mass: 1.2700000000000001E22

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