Download Java Syntax, Java Conventions, CSE 115 Conventions (Part 1) CSE 115 Spring 2006

Java Syntax, Java Conventions,
CSE 115 Conventions (Part 1)
CSE 115
Spring 2006
January 25 & 27, 2006
I - Java Files
All files that contain Java source code
have a .java extension
Code that has been compiled (using the
compiler javac) will be turned into byte
code and stored in files with a .class
extension
Run the files with the java command to
execute the program.
I – Java Files
The process of creating files is often called
the edit-compile-run cycle as the steps
are:
Create/edit your source code
Compile the code
Run the program to see if it works
If it doesn’t work correctly, go back to step 1
II – Java Syntax
Java is case sensitive (as is UNIX)
The words:
excellent
Excellent
are seen as different by Java
Java is also an extremely consistent
speller.
III – Names of Java Files
Match the names of the classes defined in
those files
Each file contains one (and only one)
class definition
All Java code must exist inside of a class
IV – Identifying the class
Class definitions begin at the word public
and end at a } that matches a { that follows
the name of the class.
public class SomeName {
Between the { } is the Java code
that outlines what the
functionality of the class is.
}
V – Class vs. Object
Class – formal specification (definition)
Object – actual instance
We need to represent properties and
capabilities formally, what programming
constructs do we use to do this?
VI – Where does the program start?
Q: How do you get your program to run in
Eclipse?
Q: What are the two types of Java
programs and what are their differences?
Program starts with the first line of the
Applet’s constructor.