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Array - setting up, filling, looking for highest and lowest values
Arrays example from a Well House Consultants training course
More on Arrays [link]

This example is described in the following article(s):
   • Setting up individual variables, and arrays, in Java - some commented examples - [link]
   • Fresh Paint - Java Arrays - [link]

Source code: A350.java Module: J705
public class A350 {
public static void main (String [] args) {

// First demo of an array

// We're going hold a table of ints (in this example) called "guests"
        int [] guests; // guests in an integer array
        guests = new int[7]; // Set it up to contain 7 values (0 thru 6)

        int sunny; // a variable for the day number ...

// Read in numbers to that table ("array")
        for (sunny=0; sunny<7; sunny++) {
                System.out.print("How many on night No. ");
                System.out.print(": ");
                guests[sunny] = (int)WellHouseInput.readNumber();

// Check its there by spilling the beans!
        System.out.println("Let's see if I got that ...");
        for (sunny=0; sunny<7; sunny++) {
                System.out.print(" ");

// Come up with a total of room-nights:
        int roomnights = 0;
        for (sunny=0; sunny<7; sunny++) {
                roomnights += guests[sunny];
        System.out.print("Total roomnights: ");

// Look for busiest and quietest

        int busiest_sofar = guests[0];
        int quietest_sofar = guests[0];

        int busiest_posn = 0;
        int quietest_posn = 0;

        for (sunny=1; sunny<7; sunny++) {
                if (guests[sunny] > busiest_sofar) {
                        busiest_sofar = guests[sunny];
                        busiest_posn = sunny;
                if (guests[sunny] < quietest_sofar) {
                        quietest_sofar = guests[sunny];
                        quietest_posn = sunny;

        System.out.print("quietest was day no ");
        System.out.print(" with ");
        System.out.println(" guests");

        System.out.print("busiest was day no ");
        System.out.print(" with ");
        System.out.println(" guests");

/* It runs like this:

wizard:jn10 graham$ java A350
How many on night No. 0: 4
How many on night No. 1: 3
How many on night No. 2: 4
How many on night No. 3: 5
How many on night No. 4: 3
How many on night No. 5: 2
How many on night No. 6: 4
Let's see if I got that ...
4 3 4 5 3 2 4
Total roomnights: 25
quietest was day no 5 with 2 guests
busiest was day no 3 with 5 guests
wizard:jn10 graham$


Learn about this subject
This module and example are covered on the following public courses:
 * Learning to Program in Java
 * Java Bootcamp
 * Java Programming for the Web
Also available on on site courses for larger groups

Books covering this topic
Yes. We have over 700 books in our library. Books covering Java and associated technologies are listed here and when you've selected a relevant book we'll link you on to Amazon to order.

Other Examples
This example comes from our "Arrays" training module. You'll find a description of the topic and some other closely related examples on the "Arrays" module index page.

Full description of the source code
You can learn more about this example on the training courses listed on this page, on which you'll be given a full set of training notes.

Many other training modules are available for download (for limited use) from our download centre under an Open Training Notes License.

Other resources
• Our Solutions centre provides a number of longer technical articles.
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The Horse's mouth provides a daily tip or thought.
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This is a sample program, class demonstration or answer from a training course. It's main purpose is to provide an after-course service to customers who have attended our public private or on site courses, but the examples are made generally available under conditions described below.

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