Java Notes
Maximum, Minimum, Average Height
This program prompts for name/height pairs and displays the maximum, ,minimum, and average heights.
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// File : flow-loops/MaxMinAvgHeight.java // Purpose: Calculates maximum, minimum, and average height. // Name : Fred Swartz // Date : 2006-04-24 import javax.swing.*; public class MaxMinAvgHeight { public static void main(String[] args) { int maxHeight = -999; // Maximum height String tallestPerson = "nobody"; int minHeight = 999; // Minimum height. String shortestPerson = "nobody"; int totalHeights = 0; // Total of all heights. int numberOfEntries = 0; // Number of inputs. while (true) { //... Read in name, height String input = JOptionPane.showInputDialog(null, "Enter name and height"); if (input == null || input.length() == 0) { break; } int spacePos = input.indexOf(" "); String name = input.substring(0, spacePos); String heightStr = input.substring(spacePos+1); int height = Integer.parseInt(heightStr); //... Check to see if this person is taller. if (height > maxHeight) { maxHeight = height; tallestPerson = name; } //... Check to see if this person is shorter. if (height < minHeight) { minHeight = height; shortestPerson = name; } //... Add to total and count. totalHeights += height; numberOfEntries++; } //... Display statistics double average = ((double)totalHeights) / numberOfEntries; JOptionPane.showMessageDialog(null, "Maximum height = " + maxHeight + " " + tallestPerson + "\nMinimum height = " + minHeight + " " + shortestPerson + "\nAverage height = " + average); } } |