private void addClass(Class<?> c) { if (classes.add(c)) { if (c.getSuperclass() != null) { addClass(c.getSuperclass()); } for (Class<?> sc : c.getInterfaces()) { addClass(sc); } for (Class<?> dc : c.getDeclaredClasses()) { addClass(dc); } for (Method m : c.getDeclaredMethods()) { addClass(m.getReturnType()); for (Class<?> p : m.getParameterTypes()) { addClass(p); } } if (c != void.class && dimensions(c) < 2) { Class<?> arrayClass = Array.newInstance(c, 0).getClass(); arrayClasses.put(c, arrayClass); addClass(arrayClass); } } }
public static void main(String[] args) throws Exception { Class<ClassTest> clazz = ClassTest.class; System.out.println("============================================="); Constructor[] ctors = clazz.getDeclaredConstructors(); System.out.println("classTest的全部构造器如下:"); for (Constructor c : ctors) { System.out.println(c); } System.out.println("============================================="); Constructor[] publicCtors = clazz.getConstructors(); System.out.println("ClassTest的全部public构造器如下:"); for (Constructor c : publicCtors) { System.out.println(c); } System.out.println("============================================="); Method[] mtds = clazz.getMethods(); System.out.println("ClassTest的全部public方法如下:"); for (Method md : mtds) { System.out.println(md); } System.out.println("============================================="); System.out.println("ClassTest带一个字符串参数的info方法为:" + clazz.getMethod("info", String.class)); Annotation[] ans = clazz.getAnnotations(); System.out.println("ClassTest的全部annotation为:"); for (Annotation an : ans) { System.out.println(an); } System.out.println("该元素上的@SuppressWarnings注释为:" + clazz.getAnnotation(SuppressWarnings.class)); System.out.println("============================================="); Class<?>[] inners = clazz.getDeclaredClasses(); System.out.println("ClassTest的全部内部类如下:"); for (Class c : inners) { System.out.println(c); } System.out.println("============================================="); Class inClazz = Class.forName("ClassTest$Inner"); System.out.println("inClazz对应的外部类为:" + inClazz.getDeclaringClass()); System.out.println("ClassTest的包为:" + clazz.getPackage()); System.out.println("ClassTest的父类:" + clazz.getSuperclass()); }