java project presentation ppt

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How to Create a MS PowerPoint Presentation in Java with a Maven Project?

In the software industry, presentations play a major role as information can be conveyed easily in a presentable way via presentations. Using Java, with the help of Apache POI, we can create elegant presentations. Let us see in this article how to do that.

Necessary dependencies for using Apache POI:

It has support for both .ppt and .pptx files. i.e. via 

• HSLF implementation is used for the Powerpoint 97(-2007) file format 
• XSLF implementation for the PowerPoint 2007 OOXML file format.

There is no common interface available for both implementations. Hence for 

• .pptx formats, XMLSlideShow, XSLFSlide, and XSLFTextShape classes need to be used.
• .ppt formats, HSLFSlideShow, HSLFSlide, and HSLFTextParagraph classes need to be used.

Let us see the example of creating with .pptx format

Creation of a new presentation:

Next is adding a slide

Now, we can retrieve the XSLFSlideLayout and it has to be used while creating the new slide

Let us cover the whole concept by going through a sample maven project.

Example Maven Project

Project Structure:

As this is the maven project, let us see the necessary dependencies via pom.xml

PowerPointHelper.java

In this file below operations are seen

• A new presentation is created
• New slides are added
• save the presentation as

We can write Text, create hyperlinks, and add images. And also the creation of a list, and table are all possible. In general, we can create a full-fledged presentation easily as well can alter the presentation by adjusting the slides, deleting the slides, etc. Below code is self-explanatory and also added comments to get an understanding of it also.

We can able to get the presentation got created according to the code written and its contents are shown in the image below

We can test the same by means of the below test file as well

PowerPointIntegrationTest.java

Output of JUnit:

We have seen the ways of creating of presentation, adding text, images, lists, etc to the presentation as well as altering the presentation as well. Apache POI API is a very useful and essential API that has to be used in software industries for working with the presentation.

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Java Projects

Apr 07, 2019

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Java Projects. Tools and techniques. Mike Godfrey Information Technology Services / The University of Texas at Austin. Outline. Look at three java projects Different architectures adopted Problems encountered and lessons learnt Tools and other useful techniques . Who are we?.

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Presentation Transcript

Java Projects Tools and techniques Mike Godfrey Information Technology Services / The University of Texas at Austin

Outline Look at three java projects • Different architectures adopted • Problems encountered and lessons learnt • Tools and other useful techniques

Who are we? • Remains of centralized data processing • Part of the unit providing IT services across campus • Traditionally mainframe based applications with web front-ends scripted in a simple in-house language • Changing mission as our administrative application development role is done by departments • Project list that requires a much more powerful language pushing adoption of Java • Changes are forcing developer to acquire new skills and ways of working – java camp.

The Systems • Clips – a web-based file system for distributing course materials • Jwebagent – a java runtime for our in-house scripting language • Tech lounge – a web-based developer documentation store

Clips – file system

Clips Requirements • A simple to use, intuitive interface • Handle all file types • Accessible from any location • Date controlled display of materials • Easy transfer of materials from class to class • Work well with existing mainframe class management system • Work within the UTDirect portal framework

Basic Design Choices • File system metaphor for user interface • Browser access for both students and faculty • Use native XML database to model the file system in a recursive schema • Store binary files in same XML database • JSP with scriptlets for display • clips interface

Use of XML for Meta Data • File system metaphor seems ideally suited to the tree structure of XML • Meta data structure based on two nodes types; directory-nodes and binary-nodes • One XML document contains all meta information needed to build file structure for a given class • Easy to re-build hierarchy of resources from XML tree • Database uses schema to specify stored document structure

Meta-Data Details • Directory nodes store information about a directory: name, creation time, description, etc • Binary nodes store information about a binary file: name, foreign key, size, content type, etc • Directory nodes can contain either binary nodes or other directory nodes (hierarchy) • clips meta data

mainframe Broker Natural Existing class management system Adabas Clips Architecture XML database (binaries and Meta-data) Helper Classes Tamino api JSP presentation layer User Broker api Authorization and class info

New Issues for us • Handling and auditing file uploads from web pages (multipart encoded forms) • Building and manipulating XML records • How to best make large scale use of JSPs in a complex Java system • How to simplify communication with mainframe

Useful Tools • Log4j – used for debugging and recording production exceptions (system written before Java 1.4) • JDOM – very user friendly api for manipulating the XML • cos.jar – used to parse the multipart encoded forms • Entire-X broker ACI for Java • Java stub generator for mainframe modules • Tamino - native XML database

Lessons Learnt • Be careful of scriplets in JSP; they expand to fill the available space! • Better to use a controller servlet to organize navigation through JSPs • XP and pair-programming works • A Java developer’s best friend is Goggle

View jsp Controller servlet Maintain jsp Update jsp Copy jsp Copy Task Copy Task Auth Task Auth Task Form Parser Form Parser Resource List Resource List Update Task Update Task mainframe mainframe XML store XML store Alternative JSP architecture View jsp Maintain jsp Update jsp Copy jsp

Jwebagent Jwebagent HTML file .WBX file

What is Webagent? • A scripting language with a syntax like Natural (mainframe language) • Scripts transformed into C++ objects forming a virtual machine which is serialized to a .WBX file • Runtime reads .WBX file, rebuilds the C++ virtual machine and executes it. • Pro: easy and productive for creating web front ends to mainframe applications. • Con: limited functionality

Why Jwebagent? • Same as Webagent but the rebuilding of the runtime is done in Java …plus • Enable java classes to run existing Webagent scripts • Enable Webagent scripts to use java classes • Improve execution speed – no process forking and script buffering

Main Runtime Elements • Servlet – handles all execution requests for a WBX file • Executor – coordinates loading file, running the VM, and handling errors for an individual file request • File loader – re-builds the serialized script objects • Context objects – handle data specific to that particular request • VmOpCodes – functional elements of the VM • Data objects – variables, literals

file request Servlet Executor vmOp vmOp broker vmOp broker vmOp broker vmOp vmOp WBX file Serial code object env http req http resp Request context Runtime Script context Builds then executes Data buffer

Useful Tools • Junit – unit testing framework (junit.org) • JProbe – application analyzer (Quest Software) • JMeter – load testing suite (Apache.org) • HttpExplorer – gui http request and response tool (in-house) • Jedit – text editor (Jedit.org) • IntelliJ IDEA – Java IDE (Jet Brains) • CVS (Tortoise, WinCVS, Putty for SSH) • Xvi32 – hex editor

Junit – unit testing • Provides easy way to set and teardown test situations • Automated running of many tests • Organize tests in suites and suites into meta-suites • Text or gui UI for test reporting • Refactor with confidence! (very valuable) • Trick is to know what tests to write • Good with Jwebagent as it is not database driven

JProbe – code analyser • Threadalizer – finds deadlocks and conflicts (did not show any problems for Jwebagent) • Memory Debugger – shows memory use by classes and can find hanging objects (useful – strings to byte arrays) • Profiler – tracks objects and the call pattern, records method time and number of calls (most useful tool –identify prime objects to optimize)

JProbe Code Optimizations • Strings to byte arrays – saved memory on string generation • io to nio gave 25% increase in through-put • In-lining of frequently used methods to reduce calling overhead • Combining of related classes when frequently constructed • Un-doing OOP improved performance!

JMeter – load testing • Build and store test plans • Control number of threads, ramp-up times and thread delay to simulate different testing scenarios • Test http apps, SOAP and web services, LDAP, JDBC, etc • Display test results in graphs, tables, files, etc • Build tests with logical flows to suit application • Apply pre and post requests during tests • Very valuable for performance tuning (with JProbe)

JVM Tuning • Changed default of client mode to server mode (20% improvement) • Other settings have given some improvements • Use incremental GC rather than ‘stop the world’ style • Uses the flags that control survivor ratio for the GC generations – we have short lived objects • Increased default memory allocation

Did we make it? • First tests showed consistently slower times than the C++ version ( up to 33* slower) • JProbe analysis and JVM tuning reduced this to about 2* slower on average • Through-put is slightly lower • JMeter shows a mean that is much faster than C++, but and average that is much higher • Problem appears to be in the multi-treading of Broker • Tried JNI against C++ broker and see same results

Lessons learned • Always build a test suite before refactoring • Never optimize until you know what to optimize • Do not assume GC defaults are optimal • Java needs lots of memory! • Allow for distractions in your project estimates (estimated time 9 months, actual time start to finish 2.5 years, actual time spent on project 10 months)

Tech Lounge

Project Goals • Nice, easy to use documentation store • Replace mainframe based system • Provide better editing and display options • Allow limited access to subsets of articles • Control the life-time of articles to ensure relevancy • Provide good search capabilities and cross-referencing options • Store multiple document formats

Design Choices • Store articles in native XML database • Article content stored against a subset of XHTML strict DTD – easy to display and construct • Each article has a meta-data XML file for owners, dates, related articles, number of reads, etc • Article display via XSLT for HTML and pdf • Article maintenance via jsps and custom tag libraries • tech lounge

Article Maintenance Architecture New Article jsp Controller servlet Maintain Article jsp Auth Task Form Parser Article Bean mainframe XML store

Useful Tools • Many things from Apache • DHTML • Graphic designer Created Tools/utilities • Tamino Wrappers – abstraction layer • UID (QUID-like foreign key generator)

Problems/Mistakes • Not using CVS well during first half of project • Not writing unit tests • Not using logging for debug messages

Evolution • Display of XML – moving towards all XSLT • JSP usage – moving away from interlinked pages towards controller server style • JSP structure – scriplets bad, custom tags good(?) • Building up institutional tools/utilities and standards that are increasing productivity • Individual experts towards wide spread Java use through in-house training courses

Review of our Java Experience Pros: • More flexible and capable • Greater abstraction possible, increased elegance • Many very powerful tools/utilities freely available Cons: • Requires higher competency of developers • Less productive for our typical applications • Needs larger machines

Other projects • PdaParser – code generation to ease communication with mainframe modules • Fatcookie – authentication • Virtual File System extension to JEdit to work with our unix server script editing proceedure Current • Jar management database (entirely XML/XSLT) • Web service wrapper for mainframe modules • Dynamic pdf generation from mainframe data

Useful Project Management Tip Remember the Bullfighter!

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Top 7 Real World Applications of Java

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Powerpoint Templates and Google slides for Java Project

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Posted on Dec 14, 2018 • Updated on Dec 17, 2018

Create PowerPoint Presentations in Java

In this article, we will show you how to create PowerPoint presentations from scratch using a free Java PowerPoint API – Free Spire.Presentation for Java.

Table of Contents

Overview of free spire.presentation for java, create a “hello world” presentation.

• Format Content in Presentation

Add Images to Presentation

Add bullet list to presentation, create table in presentation, create chart in presentation, set document properties to presentation, protect presentation with password.

Free Spire.Presentation for Java is a free Java PowerPoint API, by which developers can create, read, modify, write, convert and save PowerPoint document in Java applications without installing Microsoft Office.

For more information of Free Spire.Presentation for Java, check here .

Download Free Spire.Presentation jars: https://www.e-iceblue.com/Download/presentation-for-java-free.html

The following example shows how to create a simple presentation with “Hello World” text.

Format Text Content in Presentation

The following example shows how to format text content in a presentation.

The following example shows how to add images to a presentation.

The following example shows how to add bullet list to presentation.

The following example shows how to create table in presentation.

Free Spire.Presentation for Java supports a variety types of charts. Here we choose bubble chart as an example.

The following example shows how to set document properties, such as author, company, key words, comments, category, title and subject, to a presentation.

The following example shows how to protect a presentation with password.

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