Your Tester class main method must use an array or an ArrayList of Person objects. It must be populated from a text data file, friends_data.txt. Add the following data to your text file,
Michelle, 12/20/2008, Camilla
Bryan, 3/8/2007, Tom
Camilla, 6/7/2005, Michelle
Tom, 10/15/2007, Bryan
Charlotte, 3/2/2008, Michelle
Each line has the meaning:
-Person name, Person date of birth (MM/DD/YYYY), name of best friend
-Write a Java program that reads in the data from the friends_data.txt file, allocates a new
-Person for each and then stores the newly created object in either an Array or an ArrayList.
-Next print out a report showing the following information for each Person,
1. The Person's name
2. Their popularity counter
3. Their age on May 1, 2014
4. The name of their best friend
5. The age of their best friend on May 1, 2014
Finally, print the name of the most popular Person and the name of the oldest Person.
Person Class
import java.util.ArrayList;
public class Person {
public String personsName;
public String personsFriend;
public String personsBirthday;
public int personsPopularity;
public int popularity = 0;
"method getPopularityNumber in class Person cannot be applied to given type:
Required: java.lang.String[]; found: no arguments; reason: actual and formal argument lists differ in length.
Basically , I'm trying to make a program that makes the Finch follow the object. I have made two classes :
NewOption52 and FollowClass.
Class NewOption52 contains a method which determines the properties of the GUI. Class FollowClass contains a main method which calls GUI method from class NewOption52 and it also contains several methods which dictates the Finch's behavior alongside with appending text to JTextArea feed.
When I connect the Finch and run the program , a GUI should appear and inside JTextArea should have text which says ""Please Place An Object in front of Finch And Then Tap Finch to Activate!". It didn't happen when I run the program.
Class NewOption52 :
import edu.cmu.ri.createlab.terk.robot.finch.Finch; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JOptionPane; import javax.swing.*; public class NewOption52
I want to write an app that declares a class Person(String name, int age), and an Account class, Account(int code, double balance).But, additionally, every Person has at most 3 accounts, and each account has a Peron associated with it.
my code so far...
public class Person { private String name; private int age; private Account[] accounts; private int numOfAccounts; public Person(String name,int age){ this.name=name;
[code]....
My problem is:When I make data input for a person, and additionally I want to read data for the account(s) that this rerson has, what code should I write to create a new Account object as account[numOfAccounts].And, what is the code to assign an owner to a new created Account object?
There exists a relationship between the two classes, but I cannot find the way to implement this relation....
User-defined classes. The concept of getters and setters goes right over my head. Right now we're to write a program to test the Person class below. We have to create 2 instances of the class to test each constructor, and test each method.
class Person { // Data Members private String name; // The name of this person private int age; // The age of this person private char gender; // The gender of this person // Default constructor public Person() { this("Not Given", 0, 'U');
[code]....
then my output will print out the name. But the assignment doesn't tell us to modify the Person class at all, just to create a tester one.
I just want to add a text field and a label next to it that says "Hourly Wage".
Also, when I run this in Xcode, it reports back with "Shell Script Invocation Error" "Command usr/bin/java failed with exit code 1".
Here's my program:
package summerIncome; import java.util.Scanner; public class SummerIncomeCalculator { public static void main(String[] args) { jFrame frame = new Jframe("Summer Income Calculator"); frame.setSize(400,300);
I am making a java text adventure and i am trying to add characters to it. I wrote it exactly the same as i wrote the items class (which works fine) but for some reason the character class keeps getting a null pointer exception when it gets to line 140 in the room class
characters.add(c); game class import java.util.ArrayList; import java.util.HashMap; /** * Game class for Free Willy Five: an exciting text based adventure game. *
I am having some trouble with a Java program. I have a txt data file, which I will display, that I need to add into two separate arrays. The text file is 8 lines long that is supposed to go into two separate 4x4 matrices. A little background info on this program, reads in two arrays, compares them and outputs the largest elements of the same index and outputs them in a separate array. I somehow cannot seem to figure out how to do this. My code is below:
I am trying to create a GUI interface in swing which consists of four classes: a GUI class, which creates a main JPanel, a label, and a JList, which it takes from the second class, a MovesList class that contains a JList and the stuff needed to interface with it. It also has a main class, which basically just creates an object of the GUI class for the main window, and an Other class from which I would like to be able to add an item to the JList. I created methods in the MovesList class to get each component (like getMoveslist, or getMovesListScrollPane), which I then used to create the JList in the GUI class. I also created an addMove method so that I can add an item to the JList from any class through a MovesList object. However, this addMove method only works when called from the GUI or MovesList classes -- it does nothing when I collect from the Other class.
Here is my code:
//Main class public class TestProject { public static void main(String[] args) { GUI mainWindow = new GUI(); mainWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
[Code] ....
When I run this code, I get a window with a JLabel that says "Moves," and a JList that contains five elements -- test 1-test 5, but not a sixth "test from other class." ( using the add move method ) However, when I click on the window, the addMove method is also called, and successfully adds "test 6" to the list.
I am trying to create a second class in a single java file (first time trying this) and want to use data from the first class in the second class but I am not able to do it. What am I missing :
package simplecommissioncalculation; import java.util.Scanner; // import java.util.Scanner public class SimpleCommissionCalculation { public static void main(String[] args) {
I'm trying to share an hashmap(or any other stuff to share data) between a java class and a servlet. The hashmap has to be filled into the servlet with some data and then I have to get those data from the java class.
What is the best approach? I cannot use a DTO because I have several concurrent requests to my servlet.
**Getting data on from rfid scanner as Serial rs232 port in JFrame**, in this case I have made a JFrame form and I have a JTextField for storing data rfid as a String. Actually, I found a class from internet that read the RFID reader as byte, now How To get data from my RFID Class to my JTextfield Jframe in my main class as String?
I have a string of variable tags (tag) filled with variables, and using a Scanner (scan) to manipulate and generate data dictionary add cards for each. The variables are delimited with new line character, and the variables are structured such that the actual name of the variable contains info as to its data type, size, etc. What I need to do is move the scanner to a particular point into the string then use .nextInt() or similar. I don't want to do this to the whole variable, just where I start it from. How can I do this?
Scanner scan = new Scanner( tag ); int ptr = tag.indexOf( "_" ); ptr++; if ( Character.toLowerCase( tag.charAt( ptr ) ) == 's' ) // then start at the "_" character and grab the nextInt()
I am trying to make a text based game. the game has been working perfectly setting up the rooms, first couple of commands, and running it. I am now trying to add items to it but every time it try to run the game it returns :
java.lang.NullPointerException at Room.addItem(Room.java:107) at Game.createRooms(Game.java:133) at Game.<init>(Game.java:28) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
[Code] .....
Here are the classes that matter for this particular situation
import java.util.HashMap; public class Item { private HashMap<String, Item> itemList; private String name; private String itemDescription;
[Code] ....
I know that it is the line
itemList.put(item.getItemName(), new Item(item.getItemName(), item.getItemDescription()));
In the game class that is causing the nullpointer exception i just really cant figure out why that keeps happening and how to add the values correctly....
I need adding a textbox for users to input text onto my JFRame. Also how come the
frame.add(o);
is getting an error under the "add".
Main method class:
import javax.swing.JFrame; public class main { public static void main(String[] args) { JFrame frame = new JFrame(); bot o = new bot();
[Code] ......
Other class (this is where I want the textbox to be)
import javax.swing.JTextArea; import javax.swing.JTextField; public class bot { int x; int y; JTextField f = new JTextField(); JTextArea a = new JTextArea(30, 50); }
Is this the proper way to add to a generic list? My code works just fine, but I got this feeling that there might be some kind of flaw in it or something. Is this pretty much the basic way to add any type of data to a generic list?
import java.util.LinkedList; public class ListOfGeneric<E> { private LinkedList<E> myList;
I managed to retrieve data, and set data in my own ways in which I like. But my problem is, if the file does not contain anything (fully empty), when I try to use my
I'm just learning JFrame and the like, I have 3 classes. I have one class that just calls the methods from the other 2 classes (my superclass), I have one class that draws a frame and adds a panel and then I have my 3rd class, where I'm trying to add a button from in the class to my panel in the other class. However it won't add the button. I'm sure I'm making some obvious mistake, as I'm quite new to Java, but I've been messing around with it for ages and I can't fix it. I'm also not sure if Frame should be extending Test or not.
import javax.swing.*; import java.awt.*; public class Test { JPanel panel; JButton button1;
Having trouble adding Class (Dollar) objects to a HashSet (money), i have done this before with arraylists and i understand that HashSets are different in that they cannot contain duplicates. Currently when this code is compiled i am getting "null" printed when I run the "howFullDatWallet" method.
import java.util.*; public class Wallet { private HashSet<Dollar> money; private int walletSize = 0; private int walletFiller = 0; /** * Constructor for objects of class Pocket */ public Pocket(int walletCap)
I'm trying to fill my jtable with an arraylist. The problem is the jtable is in an extended class and the arraylist in the mainGUI. Now how can I fill the jtable with the arraylist?
That's the arraylist in my MainGUI
BufferedReader in = null; ArrayList<String> data = new ArrayList<String>(); try { in = new BufferedReader(new FileReader("1.dat.txt")); String str; while ((str = in.readLine()) != null) { data.add(str);
I'm using JBoss 7.1.1.Final. I'm writing a Spring 3.1.1.RELEASE web application and have a massive amount (~5MB) of text output to send to the browser. I would like the browser to display the output as it is generated, but right now, the browser only displays everything after the servlet's doGet method completes. Here's my method …
