我的java代码中的错误是什么。没有编译

Question

我的代码中有什么错误？代码未编译，仅在add.persons(p);

处给出编译错误

import javax.swing.*;
public class AddressBook
{
    ArrayList personInfo;

    public AddressBook()
    {
        persons=new ArrayList();
    }
    public void addperson()
    {
        String name= JOptionPane.showInputDialog("Enter name of the person ");
        String address=JOptionPane.showInputDialog("Enter address of the person ");
        String phoneNum =JOptionPane.showInputDialog("Enter phone number of the person ");
    }
        personInfo p = new personInfo(name, address, phoneNum);
        persons.add(p);
        public void searchPerson(String n)
        {
            for (int i = 0; i<persons.size(); i++)
            {
                PersonInfo p= (personInfo)person(i);
                if (n.equals(p.name))
                {
                    p.printPersonInfo();
                }

            }
        }
        public void deletPerson(String n)
        {
            for (int i = 0; i<persons.size(); i++)
            {
                PersonInfo p= (personInfo)person(i);
                if (n.equals(p.name))
                {
                    person.remove(i);
                }

            }
        }
}

Answer 1

移动这个

personInfo p = new personInfo(name, address, phoneNum);
persons.add(p);

在方法中，一切都会起作用....