Databases
StackOverflow2013
Postsdbo
POWhat is the advantage of using Java Beans?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POWhat is the advantage of using Java Beans?
    primarykey
    data
    text
    <p>I believe I understand what Java Beans are: Java class(es) which contain a no-arg constructor, are serializable, and expose their fields with getters and setters.</p> <ol> <li><p>Does a Java Bean have to expose <em>all</em> of its fields in order to qualify as a bean? If no, does it even have to expose <em>any</em>?</p></li> <li><p>May Java Beans include constructors with arguments as well as a no-arg constructor?</p></li> <li><p>What is the purpose of Java Beans, other than to conform to a certain coding style? It seems there is a lot of talk about 'beans this' or 'beans that', but I don't know <em>why</em> they are advantageous, specifically.</p></li> </ol> <p>I can totally get making the no-arg constructor. There can be a slew of reasons for it, and I wouldn't be surprised if a no-arg constructor helps the compiler do some optimizations, either. I can also understand making your class serializable. Even if the class is never serialized, it <em>could</em> be, and going back to do it retroactively could be annoying (or impossible in a black-boxed library).</p> <p>But most curious is the requirement to have fields all accessible via getters and setters. I do use them in my own work when I have need of them, but it seems odd that Java Beans requires them (possibly all of them, depending on my answer to #1). If it's an issue with reflection, couldn't the reflection get the fields just as easily? If it's an issue with doing more than simply setting the value, couldn't the reflection use a getter/setter over a field if the method exists?</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USBrian S
    1. USBrian S
    plurals
    1. This table or related slice is empty.
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POWhat is the advantage of using Java Beans?
      1. USRazor Storm
      1. VTFavorite
    2. VO
      singulars
      1. POWhat is the advantage of using Java Beans?
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POWhat is the advantage of using Java Beans?
      1. This table or related slice is empty.
      1. VTUpMod
    1. COLong ago there was a bean editor, so this page may be helpful in understanding what beans were meant for: http://java.sun.com/developer/onlineTraining/Beans/Beans1/builder-tools.html
      singulars
      1. POWhat is the advantage of using Java Beans?
      1. USJames Black
 

Querying!

 
Guidance
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.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload