Arrays And Formatting Output - Data Integers

Jan 23, 2015

I am just learning arrays or rather teaching myself about them and I am not to sure how they work and why. I understand that in order to set one up you do

int[] example1;
example1 = new int[]{01, 02, 03, 04};

But I don't really understand is why if you only need 3 data integers, why put the 4th one in?

Also with outputting data, I understand .print() and .println() but I am not to sure what .printf() does and then the formatting after that.

System.out.printf("%3d%11") // and then what you want to print

View Replies


ADVERTISEMENT

Formatting Integers Into Money

Apr 15, 2014

Having the following fields for my money class.

import java.text.DecimalFormat;
public class Money {
//Fields for money will hold dollars and cents
private long dollars;
private long cents;

My task is to use those fields and make a toString method that returns them like a dollars sign. For instance, if there are 32 dollars and 40 cents, then in my String method I have to return something similar to this "$32.40."

I have already tried some of the methods, but they don't seem to work fine.

public String toString() {
DecimalFormat formatter=new DecimalFormat("$#0");
DecimalFormat formatCents=new DecimalFormat(".00");
return formatter.format(dollars)+ formatCents.format(cents);
}

Code:

import java.text.DecimalFormat;
public class Money
{
//Fields for money will hold dollars and cents
private long dollars;
private long cents;
 
[Code] ....

Actually changed a little on my code and I believe strongly this should work; however, doesn't seem to. In my demo,

public class Dem {
public static void main(String[] args) {
Money myMoney=new Money(7.10);
System.out.print(myMoney.toString());
}
 
}

I pass this, but I get "$700.00" as the answer... confused...

My calculation is wrong in the toString method, but still the cents do not appear to be showing.

View Replies View Related

String Formatting - Enter Three Positive Integers Separated By Spaces

Sep 18, 2014

double a = scan.nextInt();
double b = scan.nextInt();
double c = scan.nextInt();

//**********************************Equations**********************************
System.out.println ();

double sum = a + b + c;
System.out.printf("Sum = %d", sum);

Heres the error I'm getting

Enter three positive integers separated by spaces, then press enter:
15 20 9

Sum = Exception in thread "main" java.util.IllegalFormatConversionException: d != java.lang.Double
at java.util.Formatter$FormatSpecifier.failConversion(Unknown Source)
at java.util.Formatter$FormatSpecifier.printInteger(Unknown Source)
at java.util.Formatter$FormatSpecifier.print(Unknown Source)
at java.util.Formatter.format(Unknown Source)
at java.io.PrintStream.format(Unknown Source)
at java.io.PrintStream.printf(Unknown Source)
at project2.main(project2.java:52)

View Replies View Related

Formatting Tables For Console Output?

Apr 13, 2014

I am writing a class which formats console output as a table. It displays the type of an entry, the name of an entry, and the data for an entry. I am stuck on a required for loop which appends a tab character to a string, for formatting it as a table. It doesn't seem to be adding any of the tabs and I can't tell what I've done wrong. As far as I can tell the contents of the loop are never reached, and I can't make sense of it.

The ConsoleWriter class that contains the code that is in error...

Java Code:

package frontend;
public class ConsoleWriter {
private static String tabbedData(String data, int min) {
System.out.println(); //for debug
int tabcount = 0;
int len=8*min;

[code]....

View Replies View Related

Error - Formatting Output String

Sep 28, 2014

I have this error that keeps coming up any time I select one of my buttons. It actually doesn't hinder the performance of the project, everything works. But I am concerned I missed something and errors are never a good sign.On a slightly different note, I would like to figure out what the best way to format my output would be? I would like it to display as "100.00 F". I have a couple ideas on how to get the F symbol (or other symbol) by inserting something like

String degreesymbol = "F" or whichever it is and then returning that in the output string later. I can't get the decimal formatted correctly and I don't know how to print the degree symbol.Here is the code

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.DecimalFormat;

[code]....

View Replies View Related

Formatting Exception Output - Keyword Not Found

Nov 7, 2014

I've been trying for a while to get my exception output to print in a particular form to System.err.

What I'm looking for as output is

KeywordException: edu.cofc.csci221.KeywordException: **Keyword Not Found**

I'm getting

Keyword Exception: edu.cofc.csci221.KeywordException
at edu.cofc.csci221.CheckLine.checkForInvalidKeyword(CheckLine.java:101)
at edu.cofc.csci221.ReadLogFile.main(ReadLogFile.java:47)

The code:

line = scan.nextLine();
try { check.checkForInvalidSymbols(line); } catch (SymbolException sEx) { System.err.print("Symbol Exception: "); sEx.printStackTrace(); }
try { check.checkForInvalidKeyword(line); }catch (KeywordException kEx) { System.err.print("Keyword Exception: "); kEx.printStackTrace(); }
if(check.checkFirstKeyword(line) && line.split(" ")[0].equals(keywords[0])) { System.out.println(line); }

[Code] ....

I'm just unsure of where to go/what to do.

View Replies View Related

Java - Private Arrays / Integers?

Jan 16, 2015

I have a project for a class where I'm supposed to be something with private arrays and private integers and I still don't understand the point of private anything within java. if I want to change a variable I'll change it. if I want it to stay the same I'll leave it the same. so what point is all this private/public nonsense unless I'm trying to stop hackers or something?

View Replies View Related

Reading Data From A File And Putting That Data In Arrays

Feb 8, 2015

I am creating a program where it reads the data inside a file and then places this data into arrays. The file I created has numbers 1-30 in it, file named, testing1.txt .

Java Code:

public static void main(String[] args) {
// TODO Auto-generated method stub
// Variables Declaration Section
//******************************
BufferedReader br;
String sCurrentLine;
String str;

[Code] ....

My issue is that the 'str' value is not initialized, but if I initialize it, it ruins the code. I'm not sure what to do in the situation.

View Replies View Related

Arrays / Strings And Related Output Arena

Apr 3, 2014

This is one of the most interesting programmes in java Number-Word..The programme give the alphabet output of a no. inserted between 1 and 10,000

Example :

Input:Enter a word less than 10000

5457

Output:Five Thousand Four Hundred And Fifty Seven

Code:--

import java.util.*;

Java Code:

class num2word
{
public static void main(String args [])
{
num2word ob = new num2word();
ob.check();
}
void check ()

[code]...

View Replies View Related

Converting Primitive Data Types To Read Integers With Decimal

Sep 13, 2014

I get an error when I try to divide 500 miles by 25.5 gallons

Exception in thread "main" java.lang.NumberFormatException: For input string: "25.5"
at java.lang.NumberFormatException.forInputString(Num berFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:580)
at java.lang.Integer.parseInt(Integer.java:615)
at Mileage.main(Mileage.java:42)
Java Result: 1

[Code] .....

View Replies View Related

Create Instance Of Array Of Several Integers And Prints Data Based On Methods

Apr 15, 2014

I have to make two classes. The first one crates an instance of an array of several integers and prints data (average, greatest, lowest, et cetera) based on the second class, which contains the methods. I'm having a problem with the syntax for the first class required to use the methods.

Here's a shortened version of what I have right now just based on processing the number of integers in the array (because if I can get just one method properly connected, I could figure out everything else).

Driver

import java.util.Arrays;
public class ArrayMethodsDriver
{
//Creates the ArrayMethods object
public static void main(String[] args)
{
int[] a = {7,8,8,3,4,9,8,7};

[Code] ....

When I try to compile this, I currently get the "class expected" error on the count part.

View Replies View Related

Data Read From File And Being Placed Into Arrays

Feb 8, 2015

I am creating a program where it reads the data inside a file and then places this data into arrays. The file I created has numbers 1-30 in it, file named, testing1.txt .

I am unable to post my code, it redirects me to a 'Page not found' page.

The problem with my program is a variable that I have initialized, is being said its not being initialized.

View Replies View Related

Looping Through JTextFields And Storing Data In Arrays

Aug 6, 2014

I am working on my second javafx program and I am getting confused. The program that I am writing is a payroll calculator. A secondary window opens at the start of the program where the user first enters the number of employees and clicks submit to save the number and to close this window. Then, the user begins to enters the employee information (first name, last name, pay rate and hours worked) when the user clicks the NextEmp button, I want the data in the text fields to be entered into arrays for later use, then clear the fields for the next use. I am running into 2 issues. The first is the close event for the secondary window that pops up. I cannot figure out the syntax. The second issue that I am running into is the loop to store the data into the arrays. I believe I am getting the text field data correctly, but I cannot figure out how to stop the loop until the NextEmp button is pressed again.

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] .....

View Replies View Related

Process Data And Determine Winners - Two Dimensional Arrays

Feb 4, 2015

The international Olympics Committee has asked you to write a program to process the data and determine the medal winners for the pairs figure skating. You will be given the following file: Pairs.txt

Which contains the data for each pair of skaters. The data consists of each skater's name, their country and the score from each of eight judges on the technical aspects and on the performance aspects. A typical record would be as follows:

Smith
Jones
Australia
5.0 4.9 5.1 5.2 5.0 5.1 5.2 4.8
4.3 4.7 4.8 4.9 4.6 4.8 4.9 4.5

The final score for each skater is the sum of the average of the two categories of score. Design a class to hold the above data and the final score. Read the data in from the file and calculate the final score for each pair. Sort the array of objects , and display the results on the screen in order, giving special prominence to the medal winners.

Here is my CLass:

public class Skaters {
private String name1;
private String name2;
private String country;
private double [] arrTech = new double [8];
private double [] arrArt = new double [8];
private double score;

[code]...

how do i print my 2 arrays using the file? i got the name1, name2 and counntry to print but im stuck on printing the scores that are stored in the arrays. Also, i have to print the average for each array. one is for techniques and the other one is artistic. as you can see i already wrote the code for it but im stuck in printing it.

View Replies View Related

Adding Data File Into Two Separate 2D Arrays In Java

Apr 27, 2014

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:

Data File:

2 7 6 4
6 1 2 4
9 7 2 6
8 3 2 1
4 1 3 7
6 2 3 8
7 2 2 4
4 2 3 1

Code:

public class prog465a {
public static void main(String[] args) {
Scanner inFile = null;
try {
inFile = new Scanner(new File("prog465a.dat.txt"));

[Code] .....

View Replies View Related

Parallel Arrays - User Input Integer 1-12 / Output Name Of Month And Number Of Days In That Month

May 11, 2015

I've been working on a question using parallel arrays where the user inputs an integer 1-12 and the output will be the name of the month and the number of days in that month. This is what I have so far

import java.util.*;
public class DaysMonth
{
public static void main (String args[]) {
Scanner keyIn = new Scanner(System.in);
int[] days = new int[]{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

[Code] ....

After I enter the user int it just ends.

View Replies View Related

Getting Data Output From Websites

Mar 2, 2014

Is it possible to use Java to input data to website, and then get the output? For example, can you use java to input a word to dictionary.com and then get the data from the resulting webpage? I've noticed there are sometimes android applications where users of a website create an app version of the website, so presumably they are working on a similar principal of using java (for android applications) to inputting information (such as when you log into the website through the app) etc. and getting the same output information you would get if you inputted that information into the actual website itself.

The real problem is:

I'm not sure if I'm correct in assuming that this is all just java doing this or if there is some other programming language being implemented to achieve this resultI don't know what terminology I should be using, as I'm not getting any results when I search on the web for how to do this.

View Replies View Related

Can Database Storage And Queries Replace All Collections And Arrays (which Basically Hold Data)

Jan 10, 2014

My friends and me are trying to make online Test taking system. We got a very basic doubt.

We have developed classes and relationship between classes for example : Online Test Taking system will have admin and student class. And Admin will have list of students.. etc.

But question troubled me was: if we use database to store all data for example student details then I can perform all sorts of operations writing sql query and store result in some other database then what is the need of "ArrayList<Student> field in Admin".??

Question is: We can put everything in database and manipulate using database(sql) functions to manipulate it.Then what is the need of Arraylist of anything which is just used to store object details for example student details....??

View Replies View Related

Not Getting Output From Array But Debug Shows Data Is There

Jul 1, 2014

I am working on a simple JAVA tutorial, not homework, where employee data is taken from an array and displayed on the console. The data is divided by department, age, name and for the Accounting and Information Systems departments, they are displayed in ascending order by employee age. Everything works except I am not getting the output to the console other than the titles. As I step through the debug, the data clearly is populating the array.

Here is my code:

Company Class:

package SimpleJavaAssignment;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.*;

[Code] .....

Prime Age Checker:

package SimpleJavaAssignment;
import java.math.*;
public class PrimeAgeChecker {
public boolean PrimeAgeChecker(int age) {
BigInteger bi = new BigInteger(String.valueOf(age));
boolean prime = bi.isProbablePrime(10);
return prime;
}
}

View Replies View Related

Servlets :: How To Output Data From Database Into Table JSP

Mar 7, 2015

I am trying to output data but get empty table. What am I doing wrong? Here is my code:

Class Item:

package com.store.util;
public class Item {
private Long id;
private String name;
private String description;
private String category;
private Double price;

[Code]...

View Replies View Related

Create Individual XML Files From Parsed Data Output Of XML File?

Feb 26, 2015

I have written a program (DOM Parser) that parses data from a XMl File. I would like to create an individual file with the corresponding name for each set of data parsed from the xml document. If the parsed output is Single, Double, Triple, I would like to create an individual xml file (Single.xml, Double.xml, Triple.xml)with those corresponding names. How do I create the xml files and give each file the name of my parsed data output?

import java.io.IOException; 
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;

[code]....

View Replies View Related

How To Create Individual XML Files From Parsed Data Output Of XML File

Feb 26, 2015

I have written a program (DOM Parser) that parses data from a XMl File. I would like to create an individual file with the corresponding name for each set of data parsed from the xml document. If the parsed output is Single, Double, Triple, I would like to create an individual xml file (Single.xml, Double.xml, Triple.xml)with those corresponding names. How do I create the xml files and give each file the name of my parsed data output? 
 
import java.io.IOException;import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;import org.w3c.dom.Element;

[Code] ....

View Replies View Related

What Is The Difference Between Regular Arrays And Multi Dimensional Arrays

Jun 28, 2014

I mainly would like to know is a int[4][4] or a int [4*4] is more efficient to use. Which takes more storage? Which requires more to process? that kind of stuff.

View Replies View Related

Formatting Array List?

Oct 16, 2014

How do you format an arraylist?

Mine looks like this:

[<?xml version="1.0" encoding="UTF-8" standalone="no"?> <DefEnv id="Dev">, <Envt id="Test">, , <DB id="DM">,

But I want it to look like: I'd prefer if the '[' , '<>' and ',' were not on them also but I'm not too bothered about that bit.

[<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<DefEnv id="Dev">,
<Envt id="Test">, ,
<DB id="DM">, ]

View Replies View Related

Formatting User Input

Feb 4, 2014

I have been given a piece of work to do for College that requires me to format user input. For example: This is an example of text that will have straight left and right margins after formatting

will transform into:

This..is..an.example
of..text..that..will
have..straight..left
and...right..margins
after.....formatting

The user inputs the width, in the case above being 20. Each line has to therefore be 20 characters long. All spaces are to be replaced with full stops.

This.is.an.example.o
f.text.that.will.hav
e.straight.left.and.
right.margins.after.
formatting..........
public class Main {
public static void main ( String args[])

[code]....

View Replies View Related

JSP :: Formatting Amounts To Be Displayed

Mar 26, 2004

How to go for formatting amounts to be displayed using JSP?

View Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved