Introduction
Essentials
Structure
Keywords
Primitive Types
Comments
Literals
Expressions
Operators
Statements
Casts & Mixing
Strings
Console Output 
   Demo
Exercises

    Supplements
Conditional: if-else
Repetitions
Flow Control
Java vs C/C++
JVM Instructions 1

As we saw in the applet and application examples in the first chapter, all Java programs are built within a class framework.

Note: You can begin to program in Java without understanding the details of object oriented code. Later chapters discuss classes and objects in detail. For now you can note the overall framework and then just concentrate on the code within a method and write programs just as if Java were a procedural language.

We provide program Starters in which you can simply insert example and exercise codes without dealing with the details of class design.

Below we show a simple example of a Java application program. In Java all coding occurs within a class definition like this. It begins with a class title line such as

public class SimpleApp1

followed by the members of the class enclosed within curly braces. The members include fields for data and methods, which are similar to functions or subroutines in other languages.

Many details will vary and classes can be much longer and more complicated but this same basic framework holds for all Java programs.

Programmers in C/C++ will note the resemblance to the main method in those languages, though its argument is not a string array.

We will discuss in later chapters the meanings of the keywords "public", "static" and "void".

Latest update: Dec.11.2003

            Tech
Arithmetic Ops
Math Class
More on Integers
FP : Overview
FP : Java  
  Demo 1
More Mix/Cast
  Demo 2
Exercises

           Physics
Differential Eq.
Euler Method
  Demo 1
Predictor-Corrector
  Demo 2
Exercises