Acquiring member variables

1, Class object to get the member variables:

Common method of class Class:

 

Creating the Person class:

package pers.reflect.person;

public class Person {
private String name;
private int age;
public String hobby;
public String height;
protected String sex;
String address;

public Person(){
    
}
public Person(String name,int age){
    this.name=name;
    this.age=age;
}


@Override
public String toString() {
    return "Person [name=" + name + ", age=" + age + ", hobby=" + hobby
            + ", height=" + height + ", sex=" + sex + ", address=" + address
            + "]";
}
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}
public int getAge() {
    return age;
}
public void setAge(int age) {
    this.age = age;
}

}

import java.lang.reflect.Field;

import pers.reflect.person.Person;

public class ReflectDemo {

    public static void main(String[] args) throws SecurityException,
            NoSuchFieldException, IllegalArgumentException,
            IllegalAccessException {

        Class c = Person.class;
        System.out.println("getFields()，获取公共的成员变量：");
        Field[] fields = c.getFields();
        for (Field field : fields) {
            System.out.println(field);
        } 

        . The System OUT .println ( " getField (), acquired specified common member variables: " ); 

        Field, hobbyField = c.getField ( " Hobby " ); 
        the System. OUT .println (hobbyField); 

        the System. OUT .println ( " getDeclaredFields (), get all of the member variables, regardless of the modifier. " ); 

        Field, [] fields1 = c.getDeclaredFields ();
         for (Field, Field: fields1) { 
            . the System OUT .println (Field); 
        } 

        the System. OUT .println (" Get the specified private member variables " ); 

        Field, the nameField = c.getDeclaredField ( " Age " ); 

        the System. OUT .println (the nameField); 

    } 
}

 2, the Field class common method:

(1) the type of the return variable:

(2) Returns the name of the property: