unit 2 structure of a java program documentation types of errors example l.
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Unit 2 - Structure of a Java Program - Documentation - Types of Errors - Example  Java’s Compiler + Interpreter Editor : Compiler : 7  MyFirstProgram.java  MyFirstProgram.class K This is you… Interpreter Interpreter Interpreter Structure of a Java Program

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slide2

Java’s Compiler + Interpreter

Editor

:

Compiler

:

7

MyFirstProgram.java

MyFirstProgram.class

K

This is

you…

Interpreter

Interpreter

Interpreter

structure of a java program
Structure of a Java Program

For Unit 2, you will be writing the most basic form of Java Programs. They look like this:

publicclass SomeName

{

public static void main (String [ ] args)

{

statement;

statement;

statement;

}

}

This name must match the filename.

This is where the program starts.

It looks for the “main method” and

begins here.

documentation called comments in computer science
Documentation(called “comments” in Computer Science)

// Name:

// Last Changed:

// Description: What does this program do.

publicclass SomeName

{

public static void main (String [ ] args)

{

statement;

}

}

At the top of each file, I would like you

have the following documentation

types of errors
Types of Errors

Syntax Error: an error that the compiler gives you. This could

be a missing “;” misspelled word, missing (), etc

Logic Error: an error that causes the program to not work

correctly. A.K.A. “Software Bugs”

Example: If the program required you

to draw an octagon and you drew a hexagon.

slide6

The First “Bug”

“(moth) in relay”

output to the console screen in java the little black screen
Output to the console screen in Java (the little black screen)
  • Two output methods:
  • System.out.println(someString);
  • System.out.print(someString);

Examples

String firstName = “Mike”;

String lastName = “Efram”;

System.out.println(firstName);

System.out.println(lastName);

System.out.print(firstName);

System.out.print(lastName);

System.out.println(firstName + “ ” + lastName);