标签：htm col get 变量 nal 成员 color 成员变量 VID
Person.java
package com.domain; public class Person { }
reflecDemo.java
package com.reflec; import com.domain.Person; public class reflecDemo { public static void main(String[] args) throws ClassNotFoundException { Class cls1 = Class.forName("com.domain.Person"); System.out.println(cls1); Class cls2 = Person.class; System.out.println(cls2); Person p1 = new Person(); Class cls3 = p1.getClass(); System.out.println(cls3); System.out.println(cls1==cls2); System.out.println(cls2==cls3); } }
运行结果：
class com.domain.Person class com.domain.Person class com.domain.Person true true
package com.domain; public class Person { public String name; public String gender; private String pass; private String captcha; protected String id; private final static String TEXT = "Hi reflecDemo"; @Override public String toString() { return "Person [name=" + name + ", gender=" + gender + ", pass=" + pass + ", captcha=" + captcha + ", id=" + id + "]"; } }
package com.reflec; import java.lang.reflect.Field; import com.domain.Person; public class reflecDemo2 { public static void main(String[] args) throws Exception { Class cls1 = Person.class; System.out.println("--------------public---------------"); //获取字段，只能public公开字段 Field name = cls1.getField("name"); System.out.println(name.getName()); //获取所有public字段 Field[] fields = cls1.getFields(); for(Field field : fields) { System.out.println(field.getName()); } System.out.println("--------------public---------------"); System.out.println("--------------private---------------"); // 获取任意字段 Field pass = cls1.getDeclaredField("pass"); System.out.println(pass.getName()); //获取所有字段 Field[] fields2 = cls1.getDeclaredFields(); for(Field field : fields2) { System.out.println(field.getName()); } System.out.println("--------------private---------------"); Field name2 = cls1.getDeclaredField("name"); System.out.println(name2.getName()); Person p1 = new Person(); name2.set(p1, "s9mf"); System.out.println(p1); } }
--------------public--------------- name name gender --------------public--------------- --------------private--------------- pass name gender pass captcha id TEXT --------------private--------------- name Person [name=s9mf, gender=null, pass=null, captcha=null, id=null]
package com.domain; public class Person { public void getinfo(String work, int age) { System.out.println("毕业后求职方向：" + work + " 年龄：" + age ); } private void gethobby() { System.out.println("play the GTA Online"); } }
package com; import java.lang.reflect.Method; import com.domain.Person; public class reflecDemo { public static void main(String[] args) throws Exception { Person p1 = new Person(); Class clazz = Person.class; //获取方法 Method info = clazz.getMethod("getinfo", String.class, int.class); System.out.println("方法名：" + info.getName()); info.invoke(p1, "光荣的打工人",20); //获取方法列表 Method[] methods = clazz.getDeclaredMethods(); for(Method method : methods) { System.out.println(method.getName()); } } }
方法名：getinfo 毕业后求职方向：光荣的打工人 年龄：20 getinfo gethobby
package com.domain; public class Person { public Person() { } public void gethobby() { System.out.println("play the GTA Online"); } }
package com; import java.lang.reflect.Constructor; import com.domain.Person; public class reflecDemo { public static void main(String[] args) throws Exception { Class clazz = Class.forName("com.domain.Person"); Constructor<Person> constructor1 = clazz.getConstructor(); Person p1 = constructor1.newInstance(); p1.gethobby(); } }
play the GTA Online
https://www.cnblogs.com/adamjwh/p/9683705.html
https://www.bilibili.com/video/BV1nK411G7ur?p=9
https://note.youdao.com/ynoteshare1/index.html?id=128508bf6a04968eced81ede9ac1b304&type=note
标签：htm col get 变量 nal 成员 color 成员变量 VID
原文地址：https://www.cnblogs.com/s0mf/p/14163696.html
