Chapter 9, Problem 20PE

Program Plan Intro

Methods to return the largest and smallest measure

Program plan:

• In a file “Measurable.java”,
  • Create the interface “Measurable”,
    • Declare a method “getMeasure()”.
  • Define a method “smallest()”,
    • Check whether the measure of object is “0”,
      • If it is true, return null value.
        • Set the first object as minimum measure.
        • Make “for” loop to traverse objects,
        • • Check whether the current object measure is smaller than the minimum object measure.
            • If it is true, assign the minimum measures of object.
        • Return the value that has minimum measures.
  • Define a method “largest()”,
    • Check whether the measure of object is “0”,
      • If it is true, return null value.
        • Set the first object as maximum measure.
        • 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 “Country.java”, create a class “Country”,
  • Declare the string and double variables.
  • Define the parameterized constructor,
    • Assign the initial values.
  • Define a method “getMeasure()”,
    • Return the area.
• In a file “MeasurableTester.java”, create a class “MeasurableTester”,
  • Define the method “main()”,
    • Create array of objects.
    • Call the constructor “3” times with different values.
    • Assign the maximum measure returned from the method “largest()”.
    • Print the maximum and expected maximum measure.
    • Assign the minimum measure returned from the method “smallest()”.
    • Print the minimum and expected minimum measure.