Main.java

package com.rubaka.students_arraylist;

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

public class Main
{

  public static void main( String[] args )
  {
    List<Student> students  = new ArrayList<>();
    Student student1 = new Student();
    student1.setFirstName( "Ivanov" );
    student1.setLastName( "123" );
    students.add( student1 );
    students.add( new Student("Petrov", "{Petr") );
    students.add( new Student("Petrov2", "{Petr2") );
    students.add( new Student("Petrov3", "{Petr3") );
    students.add( new Student("Petrov4", "{Petr4") );
    students.add( new Student("Petrov5", "{Petr5") );

    for(int i = 0; i < students.size(); i++){
      System.out.println( students.get( i ).getFirstName() + " " + students.get( i ).getLastName() );
    }

    for(Student student : students)
      System.out.println(student.getFirstName() + " " + student.getLastName());
  }
}