Java反射的几个小实例

//显示父类和所有接口
	public static void showSuperclassAndInterface(String className){
		try {
			Class<?> clazz=Class.forName(className);
			System.out.println(className+"的父类是：\n"+clazz.getSuperclass().getName());
			
			System.out.println("\n"+className+"所包含的接口有：");
			Class<?>[] interfaces=clazz.getInterfaces();
			for(Class<?> i:interfaces){
				System.out.println(i.getName());
			}
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		}
	}
	
	//显示此类中所有set方法
	public static Method[] showSetMethod(String className){
		List<Method> list=new ArrayList<Method>();
		try {
			Class<?> clazz = Class.forName(className);
			Method[] methods=clazz.getMethods();
			for(Method m:methods){
				if(m.getName().indexOf("set")==0){
					list.add(m);
				}
			}
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		}
		return list.toArray(new Method[list.size()]);
	}

	//显示所有属性的值
	public static void showAllPropertyValue(Object bean){
		Class<?> clazz=bean.getClass();
		
		Method[] methods=clazz.getMethods();
		
		List<Method> list=new ArrayList<Method>();
		
		for(Method m:methods){
			if(m.getName().indexOf("get")==0){
				list.add(m);
			}
		}
		
		for(Method m:list){
			try {
				System.out.println(m.getName().substring(3)+"屬性的值是："+m.invoke(bean, null));
			} catch (IllegalArgumentException e) {
				e.printStackTrace();
			} catch (IllegalAccessException e) {
				e.printStackTrace();
			} catch (InvocationTargetException e) {
				e.printStackTrace();
			}
		}
		
	}
	
	public static void main(String[] args) {
		//showSuperclassAndInterface("java.util.ArrayList");
		/*for(Method m : showSetMethod("Student")){
			System.out.println(m.getName());
		}*/
		Student student=new Student();
		student.setName("張三");
		student.setAge(22);
		
		showAllPropertyValue(student);