System class reflection : Field « Reflection « Java Tutorial

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;

public class ReflectionDemo1 {
  public static void main(String args[]) {
    try {
      Class c = Class.forName("java.awt.Dimension");
      Constructor constructors[] = c.getConstructors();
      for (int i = 0; i < constructors.length; i++) {
        System.out.println(" " + constructors[i]);

      Field fields[] = c.getFields();
      for (int i = 0; i < fields.length; i++) {
        System.out.println(" " + fields[i]);

      Method methods[] = c.getMethods();
      for (int i = 0; i < methods.length; i++) {
        System.out.println(" " + methods[i]);
    } catch (Exception e) {
      System.out.println("Exception: " + e);

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