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info023_01_sem2_english

Programación en Java - Parte introductoria
by

Erick Araya

on 17 February 2014

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Transcript of info023_01_sem2_english

Introduction to Java
INFO 023
Sem. II - 2013
Starting...
S.O.S!! who can help me with Java?
Do you remember her?
Algorithms!!!
Structured
Flowcharts!!
(SFCs)
Example
Example... Python!
"Interpreted"
Interpreted Language
Java?
Interpreted?
Compiled?
Compiled Language
Compiled and Interpreted
Summary
JDK? JRE?, JVM?
Piece of Software
Model of Virtual Machine
Reads and Executes "Byte-code"
JVM (Java Virtual Machine)
JVM
API classes
JRE (Java Runtime Environment)
It allows to execute a Java program
JRE
JDK (Java Development Kit)
Many other tools
In order to create, compile, execute Java programs
Una pregunta para los "nuevos":
Do you know this?
Programming Languages are
classified as:
Interpreted
Compiled
A question for "novices":
In Python?
Easy!!
print("Hello, friends!")
and in Java? (Text mode)
public class Greetings{
public static void main(String args[]){
System.out.println("Hello, friends!");
}
}
Where do I write the code?
Geany
http://www.geany.org/
DrJava
http://drjava.sourceforge.net/
Requirements:
Class !=
class

This code is valid!!,
(but not in Python..)
Let's review the code:
PROGRAMMING 2013
LECTURE 01
What does this mean?
Pseudocode!!
"public": accessible from different classes and programs
"static": allows sharing the information
"void": there is no return value to the program that called it
Develop a structured flowchart to determine whether or not a person is an adult. The user enters the age of the person, as input
Java
drjava.sourceforge.net
Syntax error
Alicia Campos Erick Araya
Full transcript