Java - Multiple fields of same data type in an object

Question

I was practicing inheritance and composition after a lesson and decided to write a small program to try some things out, stumbled upon a problem, I'll show my code, it has 4 classes including the Main.java:

public class Main {

public static void main(String[] args) {

    Person person1 = new Person("Person1", 170); //"Name", height
    Person person2 = new Person("Person2", 200); //"Name", height

    Bed bed1 = new Bed(160);

    Bedroom bedroom1 = new Bedroom(bed1, person1);

    bedroom1.sleep();

public class Bedroom {

private Bed theBed;
private Person thePerson;

//Constructors

public void sleep() {
    if(thePerson.getHeight() > 180) {
        System.out.println("You are too tall to sleep on this bed.");
    } else {
        theBed.sleepOnBed();
    }
}

//Getters

public class Bed {

private Person thePerson;
private int height;

//Constructor

public void sleepOnBed() {
        System.out.println("You sleep on the bed.");
}

//Getters

public class Person {

private String name;
private int height;

//Constructor

//Getters

What I want to do is to use both person1 and person2 in my bedroom1 object in Main.java and then test the sleep() method on both of them but I just can't figure out a way to use it.

I tried things like:

public class Bedroom {

private Bed theBed;
private Person thePerson1;
private Person thePerson2;

public Bedroom(Bed theBed, Person thePerson1, Person thePerson2) {
    this.theBed = theBed;
    this.thePerson1 = thePerson1;
    this.thePerson2 = thePerson2;
} 


public class Main {

public static void main(String[] args) {

    Person person1 = new Person("Person1", 170);
    Person person2 = new Person("Person2", 200);

    Bed bed1 = new Bed(160);

    Bedroom bedroom1 = new Bedroom(bed1, person1, person2);

    bedroom1.sleep();

But as you might understand, that lead to nothing. I'm just so tired and can't find any leads online, might be because I use the wrong keywords idk.

I want my program to take multiple objects of data type Person and see if their height matches the conditions to sleep in the bed, that's pretty much it.

You can define an `array of Person`, and pass that to `Bedroom` constructor. Then you can iterate over the array and check the condition you want. When you do that, you will need to set in the `Bed` object the person that validated the condition. — Santiago Salem, Jun 07 '17 at 20:51

secustor · Accepted Answer · 2017-06-11T17:15:49.327

1

You can replace Person with a List of Person objects in the bedroom class and then loop over the array in the sleep method.

public Bedroom(Bed bed1, List<Person> aListOfPersons)
{
  this.persons = aListOfPersons;
}

public void sleep()
{
  for(Person aPerson : persons)
   {
      //check for each aPerson if he fits in the bed
   }
 }

Welcome to Stackoverflow and happy coding!

edited Jun 11 '17 at 17:15

answered Jun 07 '17 at 20:48

secustor

3,001
2
14
20

1

Unless you are using primitives, it's generally a good idea to use `List` instead of an array. That way you don't care what the implementation is. https://stackoverflow.com/questions/1589813/when-to-use-a-list-over-an-array-in-java – Novaterata Jun 07 '17 at 23:52
Ah darn it! I haven't gotten to arrays or lists in my course yet! Thanks for the answer and the warm welcome. – Nedotian Jun 08 '17 at 15:30
1

@Nedotian If this has answered your question, please mark this question as answered. – secustor Jun 08 '17 at 15:41
@Novaterata Thanks for the info, I have changed the code accordingly. – secustor Jun 08 '17 at 15:44

Java - Multiple fields of same data type in an object

1 Answers1