package personalinformationclass;

import java.util.Scanner;

public class PersonalInformationClass {

    public static void main(String[] args) {

        Person person1 = personInfo();
        Person person2 = personInfo();
        Person person3 = personInfo();

        System.out.println("Person number ones information: ");
        System.out.print("Name " + person1.getName());
        System.out.print("Address: " + person1.getAddress());
        System.out.print("Age: " + person1.getAge());
        System.out.print("Phone: " + person1.getPhoneNumber());

        System.out.print("");

        System.out.println("Person number twos information:");
        System.out.print("Name: " + person2.getName());
        System.out.print("Address: " + person2.getAddress());
        System.out.print("Age: " + person2.getAge());
        System.out.print("Phone: " + person2.getPhoneNumber());

        System.out.print("");

        System.out.println("Person number threes information:");
        System.out.print("Name: " + person3.getName());
        System.out.print("Address: " + person3.getAddress());
        System.out.print("Age: " + person3.getAge());
        System.out.print("Phone: " + person3.getPhoneNumber());

    }

    public static Person personInfo(){

        Scanner keyboard = new Scanner(System.in);

        System.out.print("Getting persons info...");
        System.out.print("Enter name: ");
        String name = keyboard.nextLine();
        System.out.print("Enter your address: ");
        String address = keyboard.nextLine();
        System.out.print("Enter your age: ");
        int age = keyboard.nextInt();
        System.out.print("Enter your phone number: ");
        long phoneNumber = keyboard.nextLong();

        Person person = new Person (name, address, age, phoneNumber);

        return person;

    }

}

run: java.lang.NoClassDefFoundError: Person
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
at java.lang.Class.getMethod0(Class.java:3018)
at java.lang.Class.getMethod(Class.java:1784)
at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
  Caused by: java.lang.ClassNotFoundException: Person
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 7 more
  Error: A JNI error has occurred, please check your installation and try again