Question

In Java please create two classes.

Racecar - Should contain:
variables - color (string), id (string), topSpeed (int), and efficiency (double between 0-1)
getters & setters for each, but getSpeed should return topSpeed* efficiency

Main - should instantiate 3 car objects (values up to you) and compare the top speeds.
the 'winner' should be printed out as the following:
"The [color] car, [id], is the winner!"

Answer 1

Program:

import java.util.*;

class Racecar
{
String color,id;
int topSpeed;
double efficiency;

void setColor(String col)
{
color=col;
}

void setID(String id1)
{
id=id1;
}

void setTopSpeed(int ts)
{
topSpeed=ts;
}

void setEfficiency(double eff)
{
efficiency=eff;
}

String getColor()
{
return color;
}

String getID()
{
return id;
}

int getTopSpeed()
{
return topSpeed;
}

double getEfficiency()
{
return efficiency;
}

double getSpeed()
{
return topSpeed * efficiency;
}
}

class TestRaceCar
{
public static void main(String args[])
{
Scanner sc=new Scanner(System.in);

String col,id1;
int tpSpd;
double eff;

Racecar rc[]=new Racecar[3];

for(int i=0;i<=2;i++)
{
rc[i]=new Racecar();
System.out.print("\nEnter Details of Racecar "+(i+1)+": ");

System.out.print("\nEnter Color: ");
col=sc.next();
rc[i].setColor(col);

System.out.print("Enter ID: ");
id1=sc.next();
rc[i].setID(id1);

System.out.print("Enter Top Speed: ");
tpSpd=sc.nextInt();
rc[i].setTopSpeed(tpSpd);

System.out.print("Enter Efficiency ( between 0-1): ");
eff=sc.nextDouble();
rc[i].setEfficiency(eff);

}

double top=-1;
int index=-1;

for(int i=0;i<=2;i++)
{
if(i==0)
{
top=rc[i].getSpeed();
}

if(top<rc[i].getSpeed())
{
index=i;
top=rc[i].getSpeed();
}
}

System.out.println("\nThe "+rc[index].getColor()+" car, "+rc[index].getID()+" is the Winner!\n");
}
}

Output: