Storing Data In Array And Printing To Screen

Jun 2, 2014

My assignment was to create a class and then write a program that uses the methods of the class I created. All the output is correct except for the Question # Missed. It prints [I@1dd0fe7. The wrong question numbers have to be stored into an array and that array printed. I've tried using a for loop to print, rearranging the code, setting the code to how I did in the other methods. I either get this [I@1dd0fe7 -or- a bunch of 0's. I'm not sure if I am calling the method incorrectly, or just do not have the correct set-up to print the array, or if I am just not grabbing the ones that are incorrect.

public class DriverExam {
// Fields
private boolean result;
private int testTotal;
private int numWrong;
private int [] numMissed;
private char [] answerKey;

[Code] ....

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Jul 29, 2014

I need to store the data of a bunch of objects of a particular class in files in a predefined directory. Later, I want to get all the files from the directory and turn them into the objects again. Ideally, I'd like to have one file per object and have the files be human-readable and editable without too much difficulty. The class used by the objects will likely be subject to change in the future, as well. To keep things simple, all the data members are either primitives, Strings, or arrays of them. What is the best library/API to use to deal with this situation? Or should I write my own classes for these operations?

I read into serialization, but I read that it doesn't deal well with classes that are frequently modified. I also found articles on Preferences, but none of the ones I saw seem to explain how to best handle reading and writing to and from multiple objects, especially when I don't know a prior all the objects that were written to disk.

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I've sample code of jsp and servlets. Below is my code.

Index.html
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<body>
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[code]....

Now I want to store those username and age(in .html) somewhere and I want those information in welcome.jsp. Now, I'm storing all those in session itself(In doGet method(servlet)).

2 Doubt) Also, when I get the session in servlet HttpSession session = request.getSession(); line No. 27. The session value is org. apache. catalina. session. StandardSessionFacade@69a8bf4f...I'm expecting that session is to be empty. Because, I dint store anything until that line.

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Aug 6, 2014

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import javafx.application.Application;
import javafx.scene.Node;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
import javafx.scene.input.KeyCode;

[Code] .....

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Nov 16, 2014

I have declared an array list that will store data type of 1 Character and 2 integer. The data that will be store in this list is

1. A = {0 3}
2. B = {0 5}
3. C = {0 3}
4. D = {0 3}
5. E = {0 5}
6. F = {0 6}

Now here the alphabets are routers and integers are there con1 and con2 respectively. I have a set of router={ A,B,C,D,E,F}.

Step 1:I have to subtract con1 from con2 i.e. (3-0) of all the routers and
Step 2: then put the router having largest value in new set 1 and
Step 3: then this router will be subtract from the router set.
Step 4:then again I have to repeat the step 1 until the value of routers become <= 1.

Now what I did is I defined 3 arrays first is String array that stores names of routers, 2nd array that stores the first value and 3rd array that stores the second value. I can find the largest value but how to store the name of router against the largest value in the set.

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I've spent almost 3 hours on googling about java beans and where it is usable. What I've figured out is that a bean has a public non-arg constructor, properties and getters/setters to manipulate them. I also know that a bean contains no logic, only fields. However, I don't fully understand why I need to use beans instead of normal classes even if a class can do the same things like a bean? Are beans used to store data or what?

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Dec 4, 2014

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May 7, 2014

My problem is that in my program, I have the user input data for one of three product objects, however when I read the data for all three objects, the same data is stored in all of them.

Anyway this is the method from the Interface class:

private void readInput() // the only method in the program that accepts product data from the user {
Store matesStore = new Store();
String name;
int demandRate, productChoice;
double setupCost, unitCost, inventoryCost, sellingPrice;
Scanner console = new Scanner(System.in);

[Code] ....

And here is the method from the Store class:

public static void addData(int option, String newName, int newDemand, double newSetup, double newUnit, double newInventory, double newPrice)
//sets the product data for a particular product {
if (option==1) setData(product1, newName, newDemand, newSetup, newUnit, newInventory, newPrice);
else if (option==2) setData(product2, newName, newDemand, newSetup, newUnit, newInventory, newPrice);
else /*(option==3)*/ setData(product3, newName, newDemand, newSetup, newUnit, newInventory, newPrice);

[Code] ....

The problem I had was with static variables and methods.

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Nov 15, 2014

We were given a class lab that asks us to write a program that create a multidimensional array ( 5 x 5 ), populates the array using nested loops with letter from A until Y, and displays the array to the screen. and the result should look like this:

A B C D E
F G H I J
K L M N O
P Q R S T
U V W X Y

How to write this program.. I have tried all my best but the results are not coming like this..

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Feb 19, 2014

I am developing an dashboard application in Java, JSTL, MySql, Apache Tomcat 6.I have the below files

1. Dashboard.java (model)

2. DashboardDAO.java (dao)

3. DashboardController.java (Controller)

//Source
protected void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
String forward = "";
forward = LIST_DASHBOARD;
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[code]....

It works in the first time. But, after sometime the data is not retrieved and display empty screen. Once, i stop and start the server again, the data is getting retrieved again. But, later when we refresh the empty page is getting displayed again.

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Sep 24, 2014

One of the requirements of my programming assignment is that a user enters a command along with two numbers. For example, if I entered the following command:

I 5 6

The program create an image like this (it wouldn't be outputted though):

00000
00000
00000
00000
00000
00000

It creates a 5 x 6 "image". This is where my troubles begin. The program should also accepts other commands, such as:

L 3 2 F

which would produce (also not outputted):

00000
00F00
00000
00000
00000
00000

Here is my method for creating an "image" with an M * N array

for (int i = 0; i < column; i++) {
for (int j = 0; j < row; j++) {
System.out.print("0");
} System.out.println();
}

The code works, but I need to store the image in an array so it can be changed by other methods (I can't create the image manually every time). I tried doing something like this but it doesn't work:

public static String[][] createImage(int row, int column) {
String[][] image = new String[row][column];
for (int i = 0; i < column; i++) {
for (int j = 0; j < row; j++) {
image[j][i] = "0";
} System.out.println();
} return image;
}

This method outputs as many blank lines as the columns I entered and the memory location of image.

So my question is: how would I store "0" in a 2D array so that it can be accessed and changed by other methods?Or, am I using a 2D array incorrectly and will the image have to be created manually every time? If so, how would I output image if it is created in a separate method?

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Apr 1, 2014

how can i store biginteger in an array?

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Oct 9, 2014

I trying to write a piece of code which takes a set of numbers or even data type and stores in an array (or something more suitable).

For example:

Date N1 N2 N3 N4 N5 Day
10/11/2012 10 09 32 100 15 Thursday
11/12/2013 01 0 0 23 50 51 Tuesday

I'd like to be able to sort them so that if I want to search for one of the entries, I can then create a function which allows me to sort them by date or even return all the numbers by a given date or day, etc....

However, I'd like to be able to set it up so that each set is "linked" meaning that again that I can search by date and it returns everything at that date.

I wanted to use an array but I don't know:

-How to do it?

-Whether this is a suitable approach?

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Apr 17, 2014

I am having trouble fixing and figuring out how to change my code. My out put is very off.

"
Enter a 3-by-3 matrix row by row:
1 1 1
1 1 1
1 1 1
Sum of the major diagonal is 6.0
Sum of the values of the column are: 10.0
Sum of the values of the column are: 20.0
Sum of the values of the column are: 30.0 "

Code is below:

public static void main(String[] args) {
double[][] m = new double[3][3];
m = createArray();
}
private static double[][] createArray() {

[Code] ....

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Feb 28, 2015

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for (String element : teams) {
System.out.println(
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int[] wins = new int [6];
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int[] losses = new int [6];
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How do I pull 3 separate values from the user and then store each value in a separate element of each array? so if one team wins 3, draws 2 and loses 1 - I need to put 3 into the wins array, 2 into the draws array and 1 into the losses array? I then need to total all this in a table.

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Oct 30, 2014

public class MonthsName
{
static String monthsName[];
public static void main(String[] args) {
String[] months = new String[13];
months[0] = null ;

[Code] .....

I keep getting 1 error that tells me this.
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
at MonthsName.main(MonthsName.java:22)
Java Result: 1

Just before that netbeans couldn't find the main class. I was wondering if it netbeans or my code that's wrong.

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Apr 15, 2014

I am reading records from a txt file and storing it into an array

import java.util.*;
import java.io.*;
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//patients exercise time
public static void main (String[]args) throws IOException{
Scanner in = new Scanner(new FileReader("values.txt"));
double [] patientTimeRecords = new double [300];
int noExerciseCount=0, numPatients =0;
double highest=0, lowest=0, avg=0, totalTime=0;
 
[Code] ....

However an error msg keeps popping up:

Exception in thread "main" java.util.NoSuchElementException
at java.util.Scanner.throwFor(Scanner.java:907)
at java.util.Scanner.next(Scanner.java:1530)
at java.util.Scanner.nextDouble(Scanner.java:2456)
at pastpapers.PatientExercise.main(PatientExercise.ja va:44)

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Apr 22, 2015

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Reads file: Beginningbalance.txt
Displays Data with calculation
Creates a file called "Newbalance.txt" with the following values:

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import java.io.*;
import java.util.Scanner;
import java.text.DecimalFormat;
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public static void main(String[]args) throws IOException {

[Code] .....

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Jul 9, 2014

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[code]....

I realize that the second method doesn't have anything to return yet, I just wanted to put that in there while I was doing things that I actually know how to do ha. The convertNum() method is supposed to be the method with which the array of characters is converted to phone numbers.

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I'm making a game of checkers for my A2 Computing coursework which is due in within a week. I have completely finished the game, and only thing I have left to do is connect the two JPanels together via a CardLayout that I have made. However I am unsure how to do so

Here is the code from my CardLayout:

import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.FlowLayout;
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import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
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[Code] ....

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Here is the main important GUI from my CheckerBoard class:

import java.awt.*;
import java.awt.event.*;
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[Code] ....

Once again kept to a minimal.

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final static int size = 5;
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[code]...

what I need to change so that a print to file class can access EACH array in this array folder. Also if any cookie cutter printToFile class I could use/borrow/change that'd be really useful, as I've never done any printing to file before. Also, the levels of each stat and exp will be changing so that's why I need a separate class to print so that I can call it when it's been updated so we always have the most up to date stats saved.

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public class Square
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[Code].....

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