Contents (chapter 1)
•Short History
•Java Development tools
•Install JBuilder Tool and Samples
•Getting Started With Java Programming
–Compiling and Running a Java Application
–Compiling and Running a Java Applet
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Java Programming: A Beginner's Guide - History, Tools, and Getting Started, Slides of Computer Science
Learn about the history of java, its development tools, and how to get started with java programming through compiling and running applications and applets. This guide covers jdk versions, java development tools, and installation of jbuilder and samples.
Typology: Slides
2012/2013
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Contents (chapter 1)
- Short History
- Java Development tools
- Install JBuilder Tool and Samples
- Getting Started With Java Programming
- Compiling and Running a Java Application
- Compiling and Running a Java Applet
History
- James Gosling
- Oak (Embedded consumer electronic
appliances)
- Java, May 20, 1995, Sun World
- HotJava
- The first Java-enabled Web browser
Java Development Tools
- Sun JDK
- Inprise JBuilder (RAD)
- Microsoft Visual J++
- Symantec Café (RAD)
- Rouge Wave JFactory
- Sun Java Workshop
- IBM Visual Age for Java (RAD)
Install JBuilder and Samples
• Install JBuilder
• Install Sample Programs
• Setup JDK 1.2.2 environment
- Set classpath=%classpath%;c:\jbbook
- Set path=%path%;c:\jdk1.2.2\bin
- Check Java Home:
- www.javasoft.com
A Simple Application
Example 1.
//This application program prints Welcome
//to Java! public class Welcome { public static void main (String[] args) { System.out.println("Welcome to Java!"); } }
Source Run
Compiling Programs
- On command line
- javac file.java Java Source File
Bytecode
Compiler
Example
javac Welcome.java
java Welcome
output:...
A Simple Applet
Example 1.
/* This is an example of Java applets */
import java.awt.Graphics;
public class WelcomeApplet
extends java.applet.Applet { public void paint (Graphics g) { g.drawString("Welcome to Java!",10,10); }
} Source
Viewing Java Applets
Browser with Java Interpretation on Windows
Browser with Java Interpretation on Sun
Applet
Applet Viewer Utility
appletviewer htmlfile.html
Example:
appletviewer WelcomeApplet.html
Run Applet Viewer
Security Restrictions on Applets
- Applets are not allowed to read from, or write to, the file system of the computer viewing the applets.
- Applets are not allowed to run any programs on the browser’s computer.
- Applets are not allowed to establish connections between the user’s computer and another computer except with the server where the applets are stored.