public interface Measurable { double getMeasure(); /** Computes the smallest of the measures of the given objects. @param objects an array of Measurable objects @return the object with the smallest measure, null if array is empty */ static Measurable smallest(Measurable[] objects) { if (objects.length == 0) { return null; } Measurable min = objects[0]; for (Measurable obj : objects) { if (obj.getMeasure() < min.getMeasure()) { min = obj; } } return min; } /** Computes the largest of the measures of the given objects. @param objects an array of Measurable objects @return the object with the largest measure, null if array is empty */ static Measurable largest(Measurable[] objects) { if (objects.length == 0) { return null; } Measurable max = objects[0]; for (Measurable obj : objects) { if (obj.getMeasure() > max.getMeasure()) { max = obj; } } return max; } } ************************************************************************************************************* /** Class to get surface area and volume of a soda can. You are to write the class definition and implement the getMeasure method. */ //-----------Start below here. To do: approximate lines of code = 1 // Define the class SodaCan and have it implement Measurable //-----------------End here. Please do not remove this comment. Reminder: no changes outside the todo regions. { private double height; private double radius; /** Initializes a can with given height and radius. @param height the height @param radius the radius */ public SodaCan(double height, double radius) { this.height = height; this.radius = radius; } /** Calculates the surface area of the soda can. @return the surface area of the soda can */ public double getSurfaceArea() { return 2 * Math.PI * radius * (radius + height); } /** Calculates the volume of the soda can. @return the volume of the soda can */ public double getVolume() { return Math.PI * radius * radius * height; } /** Returns the area of the soda can. @return the area of the soda can */ //-----------Start below here. To do: approximate lines of code = 2 // write a method that correctly implements the Measurable interface // The method should return the surface area of the sodaCan object //-----------------End here. Please do not remove this comment. Reminder: no changes outside the todo regions. } **************************************************************************************************************** ****************** /** A class to calculate the area of several SodaCans. You are to complete the following: - Complete the method totalMeasure which calculates the total measure over all the Measurable items in a given array */ public class SodaCanTester { /** Calculates the total measure over all the given Measurable items @param items the items @return the total measure of the items */ private static double totalMeasure(Measurable[] items) { //-----------Start below here. To do: approximate lines of code = 4 // get the measure from all objects in the arr.

1. public interface Measurable
{
double getMeasure();
/**
Computes the smallest of the measures of the given objects.
@param objects an array of Measurable objects
@return the object with the smallest measure, null if array is empty
*/
static Measurable smallest(Measurable[] objects)
{
if (objects.length == 0)
{
return null;
}
Measurable min = objects[0];
for (Measurable obj : objects)
{
if (obj.getMeasure() < min.getMeasure())
{
min = obj;
}
}
return min;
}
/**
Computes the largest of the measures of the given objects.
@param objects an array of Measurable objects
@return the object with the largest measure, null if array is empty
*/
static Measurable largest(Measurable[] objects)
{
if (objects.length == 0)
{
return null;
}
Measurable max = objects[0];
for (Measurable obj : objects)
{
if (obj.getMeasure() > max.getMeasure())
{
max = obj;
}

2. }
return max;
}
}
*************************************************************************************************************
/**
Class to get surface area and volume of a soda can. You are to
write the class definition and implement the getMeasure method.
*/
//-----------Start below here. To do: approximate lines of code = 1
// Define the class SodaCan and have it implement Measurable
//-----------------End here. Please do not remove this comment. Reminder: no changes outside the
todo regions.
{
private double height;
private double radius;
/**
Initializes a can with given height and radius.
@param height the height
@param radius the radius
*/
public SodaCan(double height, double radius)
{
this.height = height;
this.radius = radius;
}
/**
Calculates the surface area of the soda can.
@return the surface area of the soda can
*/
public double getSurfaceArea()
{
return 2 * Math.PI * radius * (radius + height);
}
/**
Calculates the volume of the soda can.
@return the volume of the soda can
*/
public double getVolume()
{
return Math.PI * radius * radius * height;
}

3. /**
Returns the area of the soda can.
@return the area of the soda can
*/
//-----------Start below here. To do: approximate lines of code = 2
// write a method that correctly implements the Measurable interface
// The method should return the surface area of the sodaCan object
//-----------------End here. Please do not remove this comment. Reminder: no changes outside the
todo regions.
}
****************************************************************************************************************
******************
/**
A class to calculate the area of several SodaCans. You are to complete the
following:
- Complete the method totalMeasure which calculates the total measure over all the Measurable
items in a given array
*/
public class SodaCanTester
{
/**
Calculates the total measure over all the given Measurable items
@param items the items
@return the total measure of the items
*/
private static double totalMeasure(Measurable[] items)
{
//-----------Start below here. To do: approximate lines of code = 4
// get the measure from all objects in the array, add them up and
// return the total
//-----------------End here. Please do not remove this comment. Reminder: no changes outside the
todo regions.
}
public static void main(String[] args)
{
SodaCan[] sodaCans = new SodaCan[4];
sodaCans[0] = new SodaCan(2, 3);
sodaCans[1] = new SodaCan(3, 3);
sodaCans[2] = new SodaCan(5, 7);
sodaCans[3] = new SodaCan(1, 1);
System.out.println("--- TEST 1: Calculate the total in a standard case");
System.out.printf("RESULT: %.2fn", totalMeasure(sodaCans));

4. System.out.println("EXPECTED: 747.70");
System.out.println("n--- TEST 2: Calculate the total for empty array");
System.out.printf("RESULT: %.2fn", totalMeasure(new APerson[0]));
System.out.println("EXPECTED: 0.00");
}
}