Chapter 9, Problem 18PE

Program Plan Intro

Display average height and name of the tallest person

Program plan:

• In a file “Measurable.java”,
  • Create the interface “Measurable”,
    • Declare a method “getMeasure()”.
• In a file “Data.java”, create a class “Data”,
  • Define a method “average()”,
    • Initialize the “sum” variable.
    • Create “for” loop to iterate objects,
      • Update sum value.
        • Check whether the value is positive,
        • • Return the value.
        • Otherwise,
        • • Return “0”.
  • Define a method “max()”,
    • Check whether the measure of object is “0”,
      • If it is true, return null value.
        • Assign the object.
        • Make “for” loop to traverse objects,
        • • Check whether the current object measure is greater than the maximum object measure.
            • If it is true, assign the maximum measures of object.
        • Return the value that has maximum measures.
• In a file “Person.java”, create a class “Person” that implements “Measurable” interface,
  • Declare the necessary variables.
  • Define the parameterized constructor,
    • Assign the initial values.
  • Define a method “getHeight()” to return the height.
  • Define a method “getName()” to return the name of the person.
  • Define a method “getMeasure()” to return the height for Measurable interface.
• In a file “PersonTest.java”, create a class “PersonTest”,
  • Define the method “main()”,
    • Create an array of objects.
    • Call the constructor to assign the values.
    • Assign the value returned from the method “average()”.
    • Assign the value returned from the method “max()”.
    • Print the average and expected height.
    • Print the name of the tallest person.