Introduction to GWT Petteri Hietavirta
Introduction to GWT
Jan 13, 2015
Presentation slides for "Introduction to GWT" presented for UK Java User Group Scotland.
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Introduction to GWTPetteri Hietavirta
What is all about?
1. Write some Java code2. Compile3. AJAX web application!
Couple benefits
It is Java code for you• to write• to debug
...Couple benefits...
Compiled for all main browsers
= less effort, more optimized code
...Couple benefits
Plenty of support and examples
Active community
Features• API• Ready made widgets (but not limited to)• RPC (JSON goes as well)• History support• Debugger• JUnit• i18n• JSNI• Apache Licence v2
GWT 2.0 newfeatures
• Code splitting• UI binder• Client bundles• Layout panels• Improved compilation• Speed Tracer
How to getstarted?
1. Install GWT Eclipse plug-in2. Create a project
Example 1
Super SimpleAPI, widgets
Example 2
Somewhat functionalAPI, Widgets, Debugger
Example 3
Client-ServerAPI, Widgets, RPC
Example 4
CC7API, Widgets, JSON, i18n, JSNI, Ext GWT, and some
others
Some issues withGWT
• CSS still not trouble freebetween browsers
• GWT widgets are primitive insome cases
• Client side Java is only a subset• Compilation time
Questions?Comments and critic also welcome
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