Tomcat web server - Chapter 1: All About Java 13 public static
Chapter 1: All About Java 13 public static void main(String args[]) { double checkAmount = 1257.63; out.print( Pay to the order of ); out.print( Dr. Barry Burd ); out.print( $ ); out.println(checkAmount); } } Why You Should Use Java It s time to celebrate! You ve just picked up a copy of Java For Dummies, 4th Edition, and you re reading Chapter 1. At this rate, you ll be an expert Java programmer in no time at all, so rejoice in your eventual success by throwing a big party. To prepare for the party, I ll bake a cake. I m lazy, so I ll use a ready-to-bake cake mix. Let me see . . . add water to the mix, and then add butter and eggs . . . Hey, wait! I just looked at the list of ingredients. What s MSG? And what about propylene glycol? That s used in antifreeze, isn t it? I ll change plans and make the cake from scratch. Sure, it s a little harder. But that way, I get exactly what I want. Computer programs work the same way. You can use somebody else s program or write your own. If you use somebody else s program, you use whatever you get. When you write your own program, you can tailor the program especially for your needs. Writing computer code is a big, worldwide industry. Companies do it, freelance professionals do it, hobbyists do it, all kinds of people do it. A typical big company has teams, departments, and divisions that write programs for the company. But you can write programs for yourself or someone else, for a living or for fun. In a recent estimate, the number of lines of code written each day by programmers in the United States alone exceeds the number of methane molecules on the planet Jupiter.* Take almost anything that can be done with a computer. With the right amount of time, you can write your own program to do it. (Of course, the right amount of time may be very long, but that s not the point. Many interesting and useful programs can be written in hours or even minutes.) * I made up this fact all by myself.
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