java中如何反射获取一个类

package poi;import java.lang.reflect.Constructor;import java.lang.reflect.Field;import java.lang.reflect.Method;import java.lang.reflect.Modifier;import org.apache.poi.xwpf.usermodel.XWPFSettings;public class ReflectMain { public static void main(String[] arg) throws SecurityException, NoSuchFieldException, IllegalArgumentException, IllegalAccessException, ClassNotFoundException, InstantiationException{ XWPFSettings ct = new XWPFSettings(); Class c = ct.getClass(); System.out.println("---------------------指定类的成员变量-----------------------"); System.out.println("反射获得的类的成员变量个数"); System.out.println(c.getDeclaredFields().length); for (Field fil : c.getDeclaredFields()) {  System.out.print(fil.getType()+" ");  System.out.println(fil.getName()); } System.out.println("------------------------类的构造方法-----------------------"); for (Constructor constructor : c.getDeclaredConstructors()) {  System.out.print(Modifier.toString(constructor.getModifiers())+" ");  System.out.println(constructor.getName()); } System.out.println("--------------------------成员方法--------------------------"); for (Method method : c.getDeclaredMethods()) {  System.out.print(Modifier.toString(method.getModifiers())+" ");  System.out.print(method.getReturnType()+" ");  System.out.println(method.getName()); } System.out.println("---------------------------类的修饰符------------------------"); int mod = c.getModifiers(); String modifier = Modifier.toString(mod); System.out.println("modifier = " + modifier); System.out.println("------------------------指定类的完全限定名--------------------"); System.out.println(c.getName()); System.out.println("------------------------指定类的父类限定名--------------------"); System.out.println(c.getSuperclass().getName()); }}