JavaFX 2.0 :: String Converter Interface?
Feb 4, 2015Is there a good reason for which StringConverter is an empty abstract class instead of being an interface ?It could spare the overhead of an embedded object reference ...
View Replies
ADVERTISEMENT
String To Unicode Converter Program In Java
Mar 2, 2014I need a program to convert any string of any language to unicode using java....
View Replies View RelatedJavaFX 2.0 :: RectangleBuilder And Fluent Interface
Aug 19, 2014I noticed that in JavaFX 8, RectangleBuilder was annotated as "deprecated" but without any guidance as its replacement.
What should one use to have a fluent API and create Rectangle nodes? I could only find examples in with the developer has to painstakingly instantiate the object then use setters, which goes completely against the overall move to functional programming (for example this can't be used in streams), so I assume they are still old examples.
GUI Temperature Converter
May 4, 2015I am having calculation issues converting Fahrenheit to Celsius. The Celsius to Fahrenheit is working properly.
private void convertButtonActionPerformed(java.awt.event.ActionEvent evt) {
int tempFahr = (int)((Double.parseDouble(tempText.getText()))
* 1.8 + 32);// Calculate Fahrenheit to Celsuis:
fahrenheitLabel.setText(tempFahr + "Fehrenheit");
}
[code]...
Degrees To Fahrenheit Converter
Mar 2, 2014I am trying to teach myself a bit of java and came across the following line of code in the degrees to Fahrenheit converter tutorial:
int tempFahr = (int)((Double.parseDouble(tempTextField.getText()) )
* 1.8 + 32);
I know what the code does in that it is getting the value that the user has input in text field tempTextField and is applying the mathematical calculation to convert to Fahrenheit and assigning the result to the variable tempFahr.
I am guessing any value input into a text box is considered a string?I am guessing that Double.parseDouble takes in a string and converts it to a double.I am assuming that by simply putting (int) in front of
(Double.parseDouble(tempTextField.getText())) * 1.8 + 32)
that it calculates the value and converts it to an int?The tutorial says this example is not localizable because the parseDouble method is not localizable - what does it mean by localizable?
Number System Converter
Feb 15, 2013This program requires knowledge of manipulation of Java String objects and methods. It also requires knowledge of Number System Conversions.
// Lab16MATH05st.java
// The Number System Converter
// This is the student, starting version of the Lab16MATH05 assignment.
import java.util.Scanner;
public class Lab16MATH05st
{
public static void main (String args[])
{
System.out.println("Lab16MATH05 - Number Conversion Program
[code]....
90-Point Version Specifics: The 90-point version requires that you write both the fromHexToBin and fromBinToDec methods.
90-Point Version Output
95-Point Version Specifics {The 95-point version requires everything from the 90-point version and adds the fromBinToHex method. For this version, you may assume that the binary number will have a multiple of 4 bits.
95-Point Version Output
100-Point Version Specifics: The 100-point version requires the same methods as the 95-point version; however, the fromBinToHex method needs to be improved so it can convert regardless of the number of bits.
100-Point Version Output
105-Point Version Specifics: The 105-point version requires everything from the 100-point version and adds the fromDecToAny method. For this version, the method needs to be able to convert from decimal to any base between 2 and 10. Base 16 is not required for this version.
105-Point Version Output
110-Point Version Specifics: The 110-point version requires the same methods as the 105-point version; however, the fromDecToAny method needs to be improved so it can also convert to base-16.
GUI Converter Button - Fahrenheit To Celsius
Nov 13, 2014I am new to java and I am trying to learn a little about GUI. I found this problem of creating a converter for temp from farenheit to celcius. I have everything working, except for when I hit the converter button... it does not convert.
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
[Code] .....
Fahrenheit To Celsius Converter - Output Box
Sep 23, 2014The assignment reads: Develop a Java program (F2C.java) for converting a temperature from the Fahrenheit to the Celsius scale. The program will read the temperature graphically using an input dialog box
(JOptionPane.showInputDialog) and will show also the result graphically on a message dialog box (JOptionPane.showMessageDialog).
I can get my input box to show, but I am unable to get to the output box
What I have came up with:
import javax.swing.JOptionPane;
public class F2C {
public static void main(String[] args) {
// Enter Farenheit
String Fahrenheit = JOptionPane.showInputDialog(
[Code] .....
GUI Java Program - Hex To Binary Converter
Mar 11, 2014This code is for a GUI Java program that is supposed to convert back and fourth between two numbering systems. For example, binary to decimal or decimal to binary. I have created methods for some of the conversions however, I could successfully develop a method to convert from hex to binary. If you plan to run it to see what happens to the current method that I made please know that in the GUI the north end from left to right is as follows.
The textfield is for user entry of any type of data. The first combobox is for the user specifying to the program what type of data he or she entered. The second combobox is for the user to choose what he wants that data converted to. The button is to convert it. The south side has a textarea that gives out the results. Please note that only some of the conversions work so far. There are comments in the code to label which methods do what converisons. Need to find a method that will convert from hex to binary, what is wrong with the current method.
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
[Code] .....
Semantic Error In Hexadecimal Converter
Jun 29, 2014I'm sure the solution is simple, but I cannot find it.
/*reads a hexadecimal number input by the user and gives the corresponding base-10 value
*/
public class HexConverter
{
static int i; //used to keep place in the hexadecimal sequence given by user
public static void main(String[] args) {
//declaration of variables
String hexgiven; //the hexadecimal sequence given by user
[Code] .....
Roman To Arabic Numbers Converter
Oct 5, 2014I'm trying to do a program to convert roman numbers to arabic numbers. My problem is that I don't have the right to use Methods and Arrays. Only loops and if/else.
View Replies View RelatedRoman To Arabic Converter Says Everything Equals 1
Mar 25, 2015Im working on a roman numeral to arabic converter and all I had to do was fill out the conversion method romanToDecimal. But for some reason no matter what number I enter It always says my number is equal to one.
//Quiz 1 EC
import java.util.*;
class Roman {
private String romanNum;
private int decimalNum;
public Roman(){
romanNum = "I";
decimalNum = 1;
[code]....
Arabic To Roman Numeral Converter
Sep 12, 2014I got part of this converter built and running fine but now it's getting weird. Specifically I am getting to the part where I have to count above ten which means things like attaching Vs to Is and Xs and suchlike.
I know I have to use an .append someplace, I am just not certain how to go about it. I've been playing with it some, but this is honestly the biggest thing I've built so far that actually *ran* so I'm afraid to poke too many holes in it... where do I start? It's not like I can invent another return string and concatenate them. R is what I've got.
package hello;
public class RomansatHomans {
public static void main(String[] args) {
// input fed on this line loops through toRo and comes back as a String
// R
String R = toRo(23);
// int D = froRo("x");
[Code] ......
Hexadecimal Java Base Converter
Apr 28, 2015I am writing a program that converts any base 10 number to bases 2-16. I have the code for everything up through hexadecimal conversion, for that requires the use of letters. I understand an array list may be of use however I do not understand how to use that in this code. Below is what I have so far
import java.util.*;
import java.io.*;
public class convertBase
{
public static void main(String[] args)
{
int base;
int number;
String newNum;
[code].....
I commented out the hexadecimal portions.How would I go about coding for letters?
Odd Results From Octal-decimal Converter
Mar 13, 2015I wrote this small program to take an octal number from the user and convert it to decimal form.
import java.util.Scanner;
public class Decimal
{
public static void main (String args []) //gets octal number from user, later prints conversion
{
int octal;
[Code] .....
Some conversions work. For example, 77 will be correctly converted to 63, and 77777777 will be converted to 16777215. However, some conversions do not work. An example of this is 775002 gets converted to 74898.
Output Error About Converter (Miles / Kilometer)
Nov 28, 2014I'm doing to create miles/kilometers converter. If I put the mile, converting to kilometer is right. However, if I put the kilometer, converting to mile comes out wrong value. Which part is wrong?
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
[Code] .....
JavaFX 2.0 :: Converting String To Date Using DateTimeStringConverter
Oct 1, 2014I would like convert string to date (dd/MM/YYYY) - this is useful for compare dates in TableColumns.
so i use DateTimeStringConverter (the string "01/11/2014" is a value of DatePicker)
DateTimeStringConverter format = new DateTimeStringConverter(Locale.FRANCE,
"dd/MM/YYYY");
Date d1 = format.fromString("01/11/2014");
d1.toString()
I don't obtain the right date but this date = "Mon Dec 30 00:00:00 CET 2013" !!!
Interface Extends More Than One Interface
Jun 9, 2014Below code gets printed as output?
public interface I1 {
public void method();
}
public interface I2 {
public void method();
}
public interface I3 extends I2, I1 {
[Code] ....
Using Methods Of Interface
Feb 5, 2014I have following code. In this code CSClient is an interface. All methods of CSClient are implementaed in CSClientImpl class. Do I not need CS Client Impl imported in this code ?
How can I call getBranch() of CSClient, which is not implemented in CSClient as " this. getCsClient(). get Branch (new CSVPath(vpath), true);" ? This code works fine without any error in eclipse.
How can a method getBranch(), which is implemented in CSClientImpl class be used in this code without importing CSClientImpl ?
package com.rbc.teamsite.client;
import java.io.File;
import java.io.FileWriter;
import java.io.InputStream;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
[code]....
Variables In Interface
Jan 21, 2015Variables defined in interface are public static and final so I was thinking that we should not be able to override the variables in a class thats implementing the interface. But when I am compiling the below class, it compiles fine and gives the correct values. but when I did disp.abhi = 35; it gives a compile error (cannot override final variable)
interface display{
int abhi = 10;
void displayName();
[code]....
What Is Marker Interface
Nov 24, 2014what is marker interface?i want to know internal implemenatation and how to write custom marker interface?
View Replies View RelatedInterface As Object?
Aug 6, 2014I'm having trouble understanding the concept of the interface Connection, and PreparedStatement.
1) The simplest way to put it is how is it possible that this code is creating Connection and PreparedStatement objects? I was always under the impression that interfaces cannot be instantiated, but rather implemented. For example I don't see "public class Prepared implements Connection", or "public class Prepared implements PreparedStatement", But I see "Connection con = null;" and "PreparedStatement pst = null;". So it seems as if the interfaces are being used to create objects called con and pst.
2) If in fact these interfaces are being implemented, where are the method blocks in this code that should have been added in order to fulfill the contract?
package zetcode;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
[code]....
Concept Of Interface
Aug 22, 2014I am not getting the concept of interfaces.I know they are used to implement multiple inheritances.I also know the example that we create an interface car with certain methods so that a class like bmw which implements the car interface has to implement these methods.But I don't know how interfaces come handy?I don't know the meaning of a class calls a method using an interface?(i know that an interface can not be instantiated).
View Replies View RelatedImplementing Comparator Interface?
Mar 7, 2014overriding of the compare method.
Here's an example I found:
public class Someone {
String name;
int age;
ArrayList <Someone> listarr = new ArrayList <Someone>();
public Someone(String name1, int age1) {
name = name1;
age = age1;
[code]...
1. In the compare method, what happens when it returns one of the 0, -1, or 1? How does returning such values contribute to the sorting process? How does it take in information (like I know it does through the parameters, but how exactly)?
2. Why do we use the class name for the generics?
Interface Not Updating Properly
Mar 20, 2015The program runs well , it adds the applet but it dosn't update the interface unless I press "_"(Minimize) . To be more clear , the object paints a spring wich goes through 4 stages , it is added to the JFrame but it dosn't uptade until I minimize the frame , that is when it goes to the next stage .
The main class which calls the spring to be added to the frame :
public class principal implements ActionListener ,Runnable{
JTextField field;
JFrame frame;
private class Action implements ActionListener {
public void actionPerformed(ActionEvent event) {
frame.repaint();
[Code] .....
When To Use Interface And Abstract Class
Apr 17, 2014I know whats the interfaces and abstract class and also know that difference between interface and abstract class,but here my doubt is eventhough abstract class more advantage than the interface,then why should we use interfaces and when?
View Replies View Related