Reflection, Introspection, and Naming : Field « Reflection « Java Tutorial






import java.lang.reflect.Field;

public class RectangleFields {
  public static void main(String args[]) {
    Class rectClass = null;
    Field rectField[] = null;

    try {
      rectClass = Class.forName("java.awt.Rectangle");
      rectField = rectClass.getDeclaredFields();
    } catch (SecurityException se) {
      System.out.println("Access to Rectangle fields denied");
    } catch (ClassNotFoundException cnfe) {
      System.out.println("Didn't find the Rectangle class");
    }

    System.out.println("Fields in Rectangle are:");
    for (int i = 0; i < rectField.length; i++) {
      System.out.println(rectField[i].toString());
    }
  }
}








7.4.Field
7.4.1.Recursively get all fields for a hierarchical class tree
7.4.2.Reflect All
7.4.3.System class reflection
7.4.4.Get all declared fields from a class
7.4.5.Getting the Field Objects of a Class Object: By obtaining a list of all declared fields.
7.4.6.Getting the Field Objects of a Class Object: By obtaining a list of all public fields, both declared and inherited.
7.4.7.Getting the Field Objects of a Class Object: By obtaining a particular Field object.
7.4.8.Reflection, Introspection, and Naming
7.4.9.Get the name of a primitive type
7.4.10.Getting and Setting the Value of a Field (assumes that the field has the type int)
7.4.11.Retrieving a Predefined Color by Name
7.4.12.Get a variable value from the variable name
7.4.13.Return a list of all fields (whatever access status, and on whatever superclass they were defined) that can be found on this class.
7.4.14.Checks whether the specified class contains a field matching the specified name.
7.4.15.Return Retrurns the Type of the given Field or Method