August 2004
Intermediate to advanced
480 pages
9h 41m
English
Content preview from Java GarageBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Toolkit: A Simple Calculator
This program demonstrates how you might write a simple calculator in Java. It incorporates a number of the programming constructs we've covered so far in this book, and it could be usefully incorporated into other applications. The main thing it does that is of interest here is that it uses the standard input and shows how to read user-entered data in a complete, working app.
It demonstrates using File I/O (BufferedReader and InputStreamReader), using regular expressions, and exception handling.
package net.javagarage.apps.calculator; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.regex.Matcher; import java.util.regex.Pattern; /**<p> * Demos a working ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.