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    <p><strong>PHP</strong></p> <p>You save a file. PHP is started with the file as a source, it interprets the contents, build op codes, executes, you get results. PHP stops.</p> <p><strong>Java EE</strong></p> <p>You save a file. You compile the project (a change in one file might change other class files). You also start an Application Server (expensive) or do a context reload (less expensive). It is like doing a Apache restart after every PHP file change. You leave the Application Server running, so subsequent requests will be fast.</p> <p>But why all this trouble? Java requires an application reload because it doesn't interpret every class file on every request (like PHP does) so when changes happen a reload is required to the whole application. Another reason is that the JVM is a highly optimised beast and to have excellent performance you cannot have quick turnaround (the optimisations take time by nature). Think of running PHP with OP cache enabled and warmed up for each PHP file change.</p> <p>For small applications the reload in Java EE is quite inexpensive but it gets worse once the application grows. Once you are using couple of frameworks then on application context reload will also trigger the initialisation of these frameworks.</p> <p>If you want PHP like development experience then there is a commercial tool, <a href="http://jrebel.com" rel="nofollow">JRebel</a> available. This tool will reload the new bytecode from the changed class files instead of doing a context reload.</p>
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    1. POperformance (compilation, build, load, memory load) in the Java EE developement
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    1. COthank you for your explanation, this tool allow to reload Java EE like php (only with cltr+s and no waiting) ????
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    2. COthere is not a free tools ?
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    3. CONo free tools that would give this kind of experience in Java EE. A combination of a lightweight servlet container, low footprint frameworks, a small project, SSD and powerful computer is a good start for a quick turnaround in Java.
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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