In this article we will see how can we retrieve Filed Information using Java Reflection

Please read this post before follow post.

How to get all declared Fields ?

This means , we will get the fields names which are declared inside of the class(public , private, default, protected).

This is similar to what we did while method name extraction.

public String[] getAllOwnFieldNames(){
        ArrayList<String> allFields = new ArrayList<String>();
        for(Field aField : myClass.getDeclaredFields()){
        allFields.add("Field Name : "+aField.getName()+" , Full Name : "+aField.toString());
        }
        return allFields.toArray(new String[allFields.size()]);
    }

How to get all Fields accessors?

(which includes inherited fields of its own, super class and full hierarchy)

That means , we will get fields which are included in the class and the method which are taken from its parent class.(following full hierarchy)

public String[] getAllAccessableFields(){
        ArrayList<String> allFields = new ArrayList<String>();
        for(Field aField : myClass.getFields()){
            allFields.add("Field Name : "+aField.getName()+" , Full Name : "+aField.toString());
        }
        return allFields.toArray(new String[allFields.size()]);
    }

Note :

• in both cases, I used getName(), and toString() get full information.
• And , for both scenarios we can get access to the fields by specific names.

myClass.getDeclaredField("StingName");
myClass.getField("StringName");

And, we need to know the field name .

Thanks..:)