一、方法的反射

 

1 import java.lang.reflect.Method; 2 import java.util.Scanner; 3  4 public class kh { 5     public static void main(String[] args) { 6         Scanner s=new Scanner(System.in); 7         System.out.println("请输入字符："); 8         test dd=new test(); 9         String f=s.nextLine();10         //只需要获取类中的方法名，即可实现类中方法的调用11         try {12             Class d=test.class;13             Method method=d.getMethod(f, new Class[]{});//当方法中有参数时，此处应添加参数14             method.invoke(dd, new Class[]{});15         } catch (Exception e) {16 17         e.printStackTrace();18         }19         20 21     }22 23 }24 class test{25     public void print(){26         System.out.println("print----");27     }28     public void print1(){29         System.out.println("print1---------");30     }31 }

 2、调用javaBeen中的get函数实例

1 import java.lang.reflect.Method; 2  3 public  class kh{ 4     public static void main(String[] args) { 5         User user=new User(30,"zhangsan"); 6          7         System.out.println(h("age",user)); 8          9     }10     public static Object h(String name,Object object){11         //生成类类型12         Class a=object.getClass();13         //处理输入的name成getName或getAge14         String getname="get"+name.substring(0, 1).toUpperCase()+name.substring(1);15         try {16             //调用JavaBeen中的get函数17             Method method=a.getMethod(getname, new Class[]{});18             Object o=method.invoke(object, new Class[]{});19             return o;20         } catch (Exception e) {21             e.printStackTrace();22             return null;23         }24 25     }26 }27 class User {28     int age;29     String name;30     public int getAge() {31         return age;32     }33     public void setAge(int age) {34         this.age = age;35     }36     public String getName() {37         return name;38     }39     public void setName(String name) {40         this.name = name;41     }42     public User(int age, String name) {43         super();44         this.age = age;45         this.name = name;46     }47 48 }