Avatar of gudii9
gudii9Flag for United States of America asked on

PropertyUtils java

Hi,

I am going through below link on property utils

http://commons.apache.org/proper/commons-beanutils/apidocs/org/apache/commons/beanutils/PropertyUtils.html#getPropertyDescriptor(java.lang.Object


What for they used and why and when. How they are related to collections.
please advise
Any links resources ideas highly appreciated. Thanks in advance
JavaJSP

Avatar of undefined
Last Comment
gudii9

8/22/2022 - Mon
ASKER CERTIFIED SOLUTION
Amitkumar P

Log in or sign up to see answer
Become an EE member today7-DAY FREE TRIAL
Members can start a 7-Day Free trial then enjoy unlimited access to the platform
Sign up - Free for 7 days
or
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
See how we're fighting big data
Not exactly the question you had in mind?
Sign up for an EE membership and get your own personalized solution. With an EE membership, you can ask unlimited troubleshooting, research, or opinion questions.
ask a question
ASKER
gudii9

PropertyUtils is written using java reflection api and provides you ability to modify properties of Java object at runtime.

In the link
 http://javarevisited.blogspot.com/2012/04/java-propertyutils-example-getting-and.html
it was mentioned as below
Remember we don’t know anything about Object on compile time. On runtime Object is provided to program along with name of property to retrieve or modify:

Read more: http://javarevisited.blogspot.com/2012/04/java-propertyutils-example-getting-and.html#ixzz2uX3g47Zr




Why we do not know anything about object at compile time but  runtime Object is provided to program along with name of property to retrieve or modify.

I am not clear on those statements.
I ran above program in the javarevisited link, I got output as below
PropertyUtils Example property value: blue

what is the meaning of output

I see we are setting and getting colr from PropertyUtils
   
  //here color and blue strings can come from variety or sources
        //e.g. configuration files, database, any upstream system or via HTTP Request
        PropertyUtils.setProperty(flexiColor, "color", "blue");
        String value = (String) PropertyUtils.getProperty(flexiColor, "color");
        System.out.println("PropertyUtils Example property value: " + value);

How is it different from regular getter and setter from a bean.

 PropertyUtils.setProperty(flexiColor, "color", "blue");

Where is this setter defined.

please advise
ASKER
gudii9

I see code as below

    PropertyUtils.getPropertyDescriptor(obj, fieldName).getWriteMethod().invoke(obj, list);

What is the meaning of above code while parsing a text document which has not only primitives but also list kind of objects before sending to one other system.
please advise
ASKER
gudii9

How the reflection on class, method, field are different.
Any practical example to understand this reflection concept end to end better with set up on eclipse. please advise
Experts Exchange is like having an extremely knowledgeable team sitting and waiting for your call. Couldn't do my job half as well as I do without it!
James Murphy