public class BasicTest {public static void main(String[] args) throws Exception {Demo demo = new Demo(10,"moss");// 所有类的对象都是Class的实例Class<?> clazz = null;Class<?> clazz2 = null;//获取类对象clazz = Class.forName("demos.reflection.Demo");clazz2 = Demo.class;clazz2 = demo.getClass();Q.p(clazz.getClass());Q.p(clazz==clazz2);// 使用默认构造函数 创建一个新的实例  demo = (Demo) clazz.newInstance();demo.me();//获取所有public的构造函数Constructor<?>[] con =clazz2.getConstructors(); Q.pl(con);//使用自定义构造函数 创建一个新的实例  demo=(Demo) con[1].newInstance(100,"jack");demo.me();//获取超类 接口
        Q.p(clazz.getSuperclass());Q.pl(clazz.getInterfaces());//获取所有属性，不包括继承的Field[] fields = clazz.getDeclaredFields();Q.pl(fields);//获取无参函数，调用无参函数Method method=clazz.getMethod("me");Q.p("method "+method);method.invoke(clazz.newInstance());//获取有参函数，调用有参函数 method = clazz.getDeclaredMethod("you", int.class,String.class);Q.p("method2 "+method);method.invoke(clazz.newInstance(), 19, "you");//获取所有方法,不包括父类的， 可通过getMethods()获取全部的Method[] methods = clazz.getDeclaredMethods();Q.pl(methods);//给属性赋值Field field = clazz.getDeclaredField("name");field.setAccessible(true);field.set(demo, "reSetName");Q.p(demo.getName());//获取注解method = clazz.getMethod("toString");Annotation[] as = method.getDeclaredAnnotations();Q.pl(as);}
}

class Father{protected String father;
}interface Interface{}public class Demo extends Father implements Interface{private static String k = "k";private Integer id;private String name;Demo(){}public Demo(String name){this.name=name;}public Demo(int id, String name){this.id=id;this.name=name;}public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public void me() {Q.p("["+id+"----"+name+"]");}public void you(int id, String name){Q.p("["+id+"----"+name+"]");}@Overridepublic String toString(){return "["+id+"----"+name+"]";}}