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Thread: PhoneBook entries with ArrayList problem

  1. #1
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    Default PhoneBook entries with ArrayList problem

    Hi I am supposed to create a class and create a constructor and accessors and mutators. then i must create a program that crates 5 instance objects of the PhoneBook class and stores them in an ArrayList. then use a for loop to display all 4 instances in the Array List.

    The Problem i am having is actually hard coding the name and numbers in there and getting them to be displayed.

    Here is my code for Phone Book class

    HTML Code:
    package Program_4;
    
    public class PhoneBook {
    
    	private String name;
    	private String number;
    	  public PhoneBook() { 
    		  name = null;       
    		  name = null;    
    		  }
    
    	
    public PhoneBook(String phonename, String phonenumber){
    	name=phonename;
    	number=phonenumber;
    }
    public void setname (String phonename){
    	name=phonename;
    
    }
    public String getname(){
    	return name;
    
    }
    public  void setnumber (String phonenumber){
    	number=phonenumber;
    }
    public String getnumber(){
    	return number;
    }
    
    
    }
    Here is my program

    HTML Code:
    package Program_4;
    import java.util.ArrayList;
    
    import javax.swing.JOptionPane;
    public class PhoneBookDemo {
    
    	
    	public static void main(String[] args) {
    	PhoneBook book=new PhoneBook();
    	ArrayList <PhoneBook> entries=new ArrayList<PhoneBook>();
    	entries.add("Greg","478-454-7605");
    	entries.add("Peter","478-448-7975");
    	entries.add("Bob","478-234-7650");
    	entries.add("John","478-423-7905");
    	entries.add("Jim","478-124-7235");
    	
    	
    	for (int x = 0; x < entries.size(); x++){
    	
    	JOptionPane.showMessageDialog(null, entries.get(x));
    	}
    	
    	
    	
    	}
    
    }


  2. #2
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    Default Re: PhoneBook entries with ArrayList problem

    entries.add("Greg","478-454-7605");
    You need to create an instance of the PhoneBook class and pass that to the add method, not two Strings.
    Improving the world one idiot at a time!

  3. #3
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    Default Re: PhoneBook entries with ArrayList problem

    Thank you for your quick response. Where do i exactly create this instance in my code?

    thanks

  4. #4
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    Default Re: PhoneBook entries with ArrayList problem

    Hi,
    The modified code will as follow:
    for adding the object in the list,

    entries.add(new PhoneBook("Jim","478-124-7235"));

    bean factory
    Last edited by abani; December 18th, 2011 at 02:00 AM.

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