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Thread: Linked List question

  1. #1
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    Default Linked List question

    Hey Guys I'm really stuck on a question here what I'm supposed to do is

    Write a class that represents a person. A person should have a name and an age.
    Write a Java program that implements a linked list using the LinkedList class:

    The program should create five people objects with different names and ages and
    add them to the LinkedList using the add(e) method.
    The program should then print out the names and ages of each person object in the
    LinkedList, using a method or methods from the LinkedList class.

       public class Person
    	{
    		private int age;
    		private String firstName;
     
     
     
    		public Person(String firstName,int age)
    		{
    		this.age = age;
    		this.firstName = firstName;
     
    		}
     
     
    	public void printName() 
    		{
    		System.out.println(firstName);
    		}
     
    	public void printAge()
    		{
    		System.out.println(age);
    		}
     
     
     
    	}

    import java.util.*;
     
    public class Linkedlist{
     
    	/**
    	 * @param args
    	 */
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
     
    		String[] firstName = {"John", "Paul", "George", "Ringo", "Pete"};
    		List<String> list1 = new LinkedList<String>();
     
    		for (String x : firstName)
    			list1.add(x);
     
     
     
     
    		printMe(list1);
     
     
    	}
    		//printMe Method
     
    		private static void printMe(List<String> l){
    			for(String b :l)
    				System.out.printf("%s ", b);
    			System.out.println();
     
    	}
     
     
    }
    My problem is I have create five people objects with different names and ages and
    add them to the LinkedList using the add(e) method. The program should then print out the names and ages of each person object in the
    LinkedList, using a method or methods from the LinkedList class.
    I'm not sure exactly how I'm able to do this. Does this explain my problem?

    can anyone help me?

    GROT


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Linked List question

    Can you explain what your problem is by asking some specific questions?

    Change the java tags to code tags: Please edit your post and wrap your code with
    [code=java]
    <YOUR CODE HERE>
    [/code]
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: Linked List question

    My problem is I have create five people objects with different names and ages and
    add them to the LinkedList using the add(e) method. The program should then print out the names and ages of each person object in the
    LinkedList, using a method or methods from the LinkedList class.
    I'm not sure exactly how I'm able to do this. Does this explain my problem?

    can anyone help me?

    GROT

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: Linked List question

    There are a lot of items in the list. Which ones are the problem?
    1)create five people objects with different names and ages
    2)add them to the LinkedList using the add(e) method.
    3) print out the names and ages of each person object in the list.
    If you don't understand my answer, don't ignore it, ask a question.

  5. #5
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    Default Re: Linked List question

    What I have done is it correct?

  6. #6
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    Default Re: Linked List question

    How do you tell if a program is correct?

    Does it compile without any errors?

    Does it execute without errors and give the correct result?

    If the answers to those questions is yes and yes, then the program could be correct.


    What steps of the program have you done?
    Does the code compile OK?
    Does it execute OK?
    Are the results what you want?
    If you don't understand my answer, don't ignore it, ask a question.

  7. #7
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    Default Re: Linked List question

    The question is

    -Write a class that represents a person. A person should have a name and an age.
    -Write a Java program that implements a linked list using the LinkedList class:

    -The program should create five people objects with different names and ages and add them to the LinkedList using the add(e) method.
    -The program should then print out the names and ages of each person object in the LinkedList, using a method or methods from the LinkedList class.

    I can add names and ages to the linked list but why should I need to have a Person Class?
    Sorry for being difficult :/

  8. #8
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    Default Re: Linked List question

    Lets start with the first item in your list. What problems are you having creating the Person class?
    If you don't understand my answer, don't ignore it, ask a question.

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