Store and edit complex private string variables from a secondary class.

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Java

string

//Trying to store 4 max private first name, last name and Gender String Variables from Client.class from user input in main.Form.class

import java.util.Scanner;
public class Form {
public static void main(String[] args) {

        Client clientObject = new Client();
	clientObject.setName();

{System.out.println
         ("Welcome to Form User Interface."); 
        
    System.out.println 
         ("Press: (Eneter) key to Continue");} 
	
         {Scanner s = new Scanner(System.in);
	    s.nextLine();}


if (personOne = null && personTwo = null && personThree = null && personFour = null){
       
       Client = new Client();
       System.out.println("add Clients first name\n");
       Scanner s = new Scanner (System.in);
       String First Name = scanner.next();

       System.out.println("add Clients last name\n");
       Scanner s = new Scanner (System.in);
       String Last Name = scanner.next();}

       System.out.println("what is clients Gender\n");
       Scanner s = new Scanner (System.in);
       String Gender = scanner.next();}
else{ 
       system.out.println("No space for new Client"); }}

i'm not sure how I get a new class (Client.class) to fully recognise 4 different Strings containing 3 seperate string variables (Client id 1,2,3,4 then First name, Last name and Gender)

I know my code looks like something a mad man made, But any help would be great, i have tried to look on google and have gone through the API for Java and im at a loss.

What I have tried:

public class Client 
{        
        private string Client1;
        private string Client2;
        private string Client3;
        private string Client4;
        
        public Client(String name){
   
    
        private String First Name; 
	private String Last name;
        private String Gender
	
}

basically I know this code is rubbish and has to have completly different logic in order to work I just can't figure that out.

again, I need to know a way to store max 4 private strings that contain 3 fields that the user can decide and that can be stored in the second class and can be called upon as an object in the main form class.