Object Reflection: set value

       
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import java.awt.Rectangle;
import java.lang.reflect.Field;

public class SampleSet {

  public static void main(String[] args) {
    Rectangle r = new Rectangle(100, 20);
    System.out.println("original: " + r.toString());
    modifyWidth(r, new Integer(300));
    System.out.println("modified: " + r.toString());
  }

  static void modifyWidth(Rectangle r, Integer widthParam) {
    Field widthField;
    Integer widthValue;
    Class c = r.getClass();
    try {
      widthField = c.getField("width");
      widthField.set(r, widthParam);
    } catch (NoSuchFieldException e) {
      System.out.println(e);
    } catch (IllegalAccessException e) {
      System.out.println(e);
    }
  }
}

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4.	Object Reflection: get field value
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9.	Set private field value
10.	Get fields of a class object
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12.	Getting the Field Objects of a Class Object: By obtaining a list of all declared fields.
13.	Getting the Field Objects of a Class Object: By obtaining a list of all public fields, both declared and inherited.
14.	Getting the Field Objects of a Class Object: By obtaining a particular Field object.
15.	Get all declared fields from a class
16.	Retrieving a Predefined Color by Name
17.	Get a variable value from the variable name
18.	Fetches all fields of all access types from the supplied class and super classes
19.	Checks whether the specified class contains a field matching the specified name.
20.	whether given field is a "public static final" constant
21.	Process bean properties getter by applying the JavaBean naming conventions.
22.	Fetches the property descriptor for the named property of the supplied class
23.	Find Field
24.	Return a list of all fields (whatever access status, and on whatever superclass they were defined) that can be found on this class.
25.	Get all fields of a class.
26.	Find field 2
27.	Get class field/property
28.	Accessible Field Iterator
29.	Adds all Fields (from Class.getFields) to the list
30.	Retrieve a value from a property
31.	Set the value of the field of the object to the given value.
32.	Fast Property accessor for a single class.

Object Reflection: set value : Field « Reflection « Java

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