package com.imooc.reflect.project;

public class Address {

    //私有属性：地址编号、姓名、详细地址、电话
    private Integer code;
    private String name;
    private String detail;
    private Integer tel;

    //无参构造及带参构造，get和set方法
    public Address(Integer code, String name, String detail, Integer tel) {
        super();
        this.code = code;
        this.name = name;
        this.detail = detail;
        this.tel = tel;
    }
    public Address() {
        super();
        // TODO Auto-generated constructor stub
    }

    public Integer getCode() {
        return code;
    }
    public void setCode(Integer code) {
        this.code = code;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getDetail() {
        return detail;
    }
    public void setDetail(String detail) {
        this.detail = detail;
    }
    public Integer getTel() {
        return tel;
    }
    public void setTel(Integer tel) {
        this.tel = tel;
    }

    //toString()方法
    @Override
    public String toString() {
        return "Address [code=" + code + ", name=" + name + ", detail=" + detail + ", tel=" + tel + "]";
    }

    //公有方法public void display(){}输出：这是一个地址
    public void display() {
        System.out.println("这是一个地址！");
    }

    //私有方法private void info(){}输出：我是私有方法
    private void info() {
        System.out.println("我是私有方法！");
    }

    //私有方法private void equalsAddress(String name){}比较参数和name的值是否一致 
    //输出比较结果，如：相等，或不相等
    private void equalsAddress(String name) {
        if(name.equals(this.name)) {
            System.out.println("相等");
        }else {
            System.out.println("不相等");
        }
    }
}

​package com.imooc.reflect.project;

import java.lang.reflect.Method;

import org.junit.Test;

public class MethodTest {
    @Test
    //通过Method调用display()方法
    public void demo1() throws Exception {
        Class clazz=Class.forName("com.imooc.reflect.project.Address");
        Address address=(Address) clazz.newInstance();
        Method methodDisplay=clazz.getMethod("display");
        methodDisplay.invoke(address);
    }

    @Test
    //通过Method调用info()方法
    public void demo2() throws Exception {
        Class clazz=Class.forName("com.imooc.reflect.project.Address");
        Address address=(Address) clazz.newInstance();
        Method methodInfo=clazz.getDeclaredMethod("info");
        methodInfo.setAccessible(true);
        methodInfo.invoke(address);
    }

    @Test
    //通过Method调用equalsAddress(String name)方法
    public void demo3() throws Exception {
        Class clazz=Class.forName("com.imooc.reflect.project.Address");
        Address address=(Address) clazz.newInstance();
        Method methodEqualsAddress=clazz.getDeclaredMethod("equalsAddress",String.class);
        methodEqualsAddress.setAccessible(true);
        methodEqualsAddress.invoke(address,"");
    }
}

还有一个问题，代码最后部分这里传参传null为什么会报错呢？

methodEqualsAddress.invoke(address,null);