Java反射 getDeclaredField()和getField()方法的区别

import java.lang.reflect.Field;


class Father{
    public String fname;
}

public class Test extends Father{

    private String name ;
    public Integer age ;

    protected String sex;

    public static void main(String[] args) throws Exception {

        Field privateName = Test.class.getDeclaredField("name");
        //Field publicName = Test.class.getField("name");//报错 NoSuchFieldException: name
        System.out.println("privateName="+privateName);
        //System.out.println("publicName="+publicName);

        Field privateAge = Test.class.getDeclaredField("age");
        Field publicAge = Test.class.getField("age");

        System.out.println("privateAge="+privateAge);
        System.out.println("publicAge="+ publicAge.getName());


        Field privateSex = Test.class.getDeclaredField("sex");
       // Field publicSex = Test.class.getField("sex");//报错
        System.out.println("privateSex="+privateSex);
        //System.out.println("publicSex="+publicSex);

       // Field privateFname = Test.class.getDeclaredField("fname"); //报错
        Field publicFname = Test.class.getField("fname");

        /**
         * 结论：
         * getDeclaredField() 可以获取类本身的所有的属性成员
         * getField() 只能获取本类及其父类的public成员
         */
    }
}