Chapter 6, Problem 16PE

Program Plan Intro

Program plan:

VerticalBarChart.java

• Create a class named “VerticalBarChart”.
  • Define a function named “readinputValues”.
    • Create an ArrayList object called “numlist”, which will store integer values.
    • Using “while(num >= 0)” loop, checks whether  “num” is greater than or equal to “0” or not .
      • If the condition is true, read and stores the new positive integers into the array list using “add()” method
    • Return “numlist”.
  • Define an “int” function named “findMaxCount”.
    • Declare an integer variable named “maxcount” and access the list using “get()” method.
    • Using enhanced “for” loop, iterate and find the maximum value in the array list.
      • Inside the loop, the conditional statement “if” checks whether “z” is greater than “maxcount” or not  
        • If the condition is true, the maximum value will be stored in the variable “maxcount”
        • • Return “maxcount”.
  • Define a function named “printVerticalBarChart”.
    • Initialize “MAXIMUM_HEIGHT” as “20”
    • Declare an integer variable named “large” and call the function “findMaxCount”.
    • Compute and stores the scale value into the variable name “scalevalue”.
    • At each iteration, print all rows using the outer “for” loop
      • Using the inner “for” loop, at each iteration print one column for each item.
        • Using “get()” method, retrieve a number from the list and store it into the variable “number”.
        • Next calculate the “number” value using the “scalevalue”.
        • Using “if” conditional statement, check whether “row” is greater than or equal to “MAXIMUM_HEIGHT - number”.
        • • If the condition is true, print a “*” symbol else print an empty space.
  • Define a main function.
    • Declare an array list variable named “Arrlist” and call the function “readinputvalues” to read a sequence of positive integer values.
    • Call the function "printVerticalBarChart" and pass “Arrlist” as parameter for displaying the vertical bar chart of asterisks based on maximum value and input values in the array list.