Add userinput to ArrayList java

Question

I'm stuck with this matter. I am trying to add new info to the "old" info in an ArrayList. I have tried a few different ways, but I can't get it to stay there.

import java.sql.Statement;
import java.util.*;

public class Head {
public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    String lname, fname, y, m, d, x, dob, phone, place = null, info;
    int choice;

    Date today = new java.util.Date();
    java.sql.Date sqlDate = new java.sql.Date(today.getTime());

    ArrayList<Person>plist = new ArrayList<>();
    ArrayList<Faktura>flist = new ArrayList<>();

    Person p1 = new Person("Shaerer", "Lucas", "200307302232", "0702-523219", "Stockholm", "Her we put some info");
    Person p2 = new Person("Smith", "Jacob", "197609071464", "0761-617163", "Miami", "Some information about this person");

    plist.add(p1);
    plist.add(p2);

case 2:
                                    System.out.println("Add info");             
                                    System.out.println("------------------------------------------------------");
                                          System.out.println(String.format("%-15s%-15s", p.getLname(), p.getFname()));
                                    System.out.println("------------------------------------------------------");
                                    System.out.println(String.format("DateOfBirth: "+ p.getDob()));                                     
                                    System.out.println(String.format("Adress: "+ p.getPlace()));
                                    System.out.println(String.format("Phone: "+ p.getPhone()));
                                    System.out.println(String.format("Info: \n"+ p.getInfo()));
                                    System.out.println("\n" + sqlDate);
                                    System.out.println("Info: ");                                       
                                    info = scan.nextLine();
//                                      plist.add(this);

//                                      for(int i = 0;i<plist.size(); i++){
//                                      List<Person>plist = Arrays.asList(plist);

//                                      for (Person s : plist)
//                                          plist.add(s);

                                    break;

Constructor

public class Person {
private String lname, fname, dob, phone, place, info;

public Person(String lname, String fname, String dob, String phone, String place, String info){
    this.lname = lname;
    this.fname = fname;
    this.dob = dob;
    this.phone = phone;
    this.place = place;
    this.info = info;
}
public String getLname(){
    return lname;
}
public String getFname(){
    return fname;
}
public String getDob(){
    return dob;
}
public String getPhone(){
    return phone;
}
public String getPlace(){
    return place;
}
public String getInfo(){
    return info;
}
public String toOutputFormat(){
    return this.fname + this.lname + this.dob + this.phone + this.place + this.info;
}
}

I already have a String in 'Info', but I would like to add new info to 'Info' (not replace the old info), so when I go to check all info about that person ther will be

"Old" info: blah blah blah

"New" info: (if I could get the date to stick here too it would be awsome) Jada jada jada

I have tried to google this but with no luck. I'm not even sure you can do this... But I'm sure that if you can, this is the place to look :)

Thank you for your time

Answer 1

It's a little difficult to understand what you want to do - but I guess you want to modify the info String in the Person class - this can be achieved by adding a setter:

public setInfo(String newInfo){
    info = newInfo;
}

or even adding:

public addInfo(String newInfo){
    info += newInfo;
}

using it looks like:

EDIT:

import java.util.*;

public class Head {
public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    String lname, fname, y, m, d, x, dob, phone, place = null, info;
    int choice;

    ArrayList<Person>plist = new ArrayList<>();
    ArrayList<Faktura>flist = new ArrayList<>();

    Person p1 = new Person("Shaerer", "Lucas", "200307302232", "0702-523219", "Stockholm", "Her we put some info");
    Person p2 = new Person("Smith", "Jacob", "197609071464", "0761-617163", "Miami", "Some information about this person");

    plist.add(p1);
    plist.add(p2);
    p1.setInfo("SomeThing new and exciting");
    p1.addInfo(" and exhilarating");
System.out.println(p1.getInfo());
    }

Since I don't know where you're going with this - I'm just providing an example. Above code will add your two persons to plist and afterwards edit their info field.