如何从FXML控制器访问ArrayList

Question

我正在使用JavaFX，我正在尝试从控制器文件添加到一个ArrayList类，所以当在FXML文件上按下创建按钮时，控制器将一个人对象添加到一个联系类，这是一个arrayList但是我希望ArrayList类Contacts是全局的，这样我就可以编辑稍后在

中添加到列表中的任何内容

人员类：

package project1;

/**
 *
 * @author Fomnus
 */
public class Person {
    private String firstName;
    private String lastName;

    /**
     * Constructor with parameter
     *
     * @param firstName
     * @param lastName
     */
    public Person(String firstName, String lastName) {
        this.firstName = firstName;
        this.lastName= lastName;
    }

    /**
     * Method to get the name of person
     */
    public String getFirstName() {
        return firstName;
    }
    public String getLastName() {
        return lastName;
    }

    /**
     * Method to set the name of person
     */
    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

}

Contacts类ArrayList：

package project1;

import java.util.ArrayList;
import java.util.List;

/**
 *
 * @author Fomnus
 */
public class Contacts {

    public static void main(String args[]) {
      // create an array list
      ArrayList contactsList = new ArrayList();

      Person person1= new Person("John", "Doe");
      Person person2= new Person("Jane", "Rivers");
      Person person3= new Person("Steve", "Smith");
      Person person4= new Person("Lucy", "White");

      contactsList.add(person1);
      contactsList.add(person2);
      contactsList.add(person3);
      contactsList.add(person4);

   }
}