I 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
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?
I 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.
The 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(
This 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.
This 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.
I'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
I'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.
Im 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;
I 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");
I 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?
I 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.
Is 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 ...
I'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?
Write a CiUI application that converts Celsius temperatures to Fahrenheit temperatures. The user should be able to enter a Celsius temperature, click a button, and then sec the equivalent Flhnfflhelt temperature. Use the following formula to make the conversion: F - - y C + 32..F is the Fahrenheit temperature and C is the Celsius temperature.
Now the program runs (In Jgrasp) But when I Enter a number in the fahrenheit box and hit "COnvert' NOTHING happens. I went over my code and I can't find what seems to be the problem...I tried changing
ActionListener Listener = new ConvertListener(); convertBtn.addActionListener(ConvertListener); <----- I tried changing ConvertListener to just Listener but it gives me more problems import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextField;
I'm new to coding and we have an assignment for class to convert fahrenheit to celsius so far this is what i have:
import java.util.Scanner; public class Lab5 { public static void main(String[] args) { //variable dec Scanner scan = new Scanner(System.in); double input;
[code]...
This is what he wants us to do "Write a method name celsius that accepts a Fahrenheit temperature as an argument. The method should return the temperature, converted to Celsius. Demonstrate the method by asking the user a temperature value to convert. Then below the result, call a loop that displays a table of the Fahrenheit temperatures 0 through 20 and their Celsius equivalents."
I have followed the instructions carefully but the conversion values are not correct.
Write a program that displays a table of the Celsius temperatures 0 through 20 and their Fahrenheit equivalents. The formula for converting a temperature from Celsius to Fahrenheit is F - | C + 32 where ¥ is the Fahrenheit temperature and C is the Celsius temperature. Your program must use a loop to display the table.
Code
public class TempConversion { public static void main(String[] args) { for(double i = 0; i <= 20.0; i++) {
I was asked to work on building a program that can convert Fahrenheit to kelvin. Need to create a for loop that spits out the value of kelvin for every degree increase from 32 degrees Fahrenheit to 100 degrees Fahrenheit.
Every time I input a number for fahrenheit, I always get 273.15. Everything compiles, the only problem is that run-time error. I need getting fahrenheit to exactly change to kelvin.
//my class public class TempConversion { private double fahrenheit; public TempConversion() { fahrenheit = 0;
I am writing a small program to convert temperature from Fahrenheit to Centigrade. I cannot figure out why I keep getting 0.00 for the Centigrade temperature output. Also, I cannot figure out how to get the F degree symbol before or after the temp. I know in JOptionPane the char = 176 is the code for it but im not sure how to code it into the program. My program keeps saying 0.00 for Centigrade temp on the output ....
import javax.swing.JOptionPane; import java.text.DecimalFormat; public class tempConversion { public static void main(String[] args) { String newDecimal;
[Code] .....
Okay I figured out the Degree symbol!(String DEGREE = "u00b0") phew... now only if i can get the correct output!
I am new to Java, programming, and intelliJ. I am trying to make a BMI Calculator using this code as my initial template which converts Fahrenheit to Celsius.
import javax.swing.JFrame; public class Fahrenheit { //----------------------------------------------------------------- // Creates and displays the temperature converter GUI. //-----------------------------------------------------------------
[code]....
I created a local field within BMIButtonListener for weight, height, resultLabel, and was able to compile but it did not calculate and listed exceptions.
Write java program using table that stores celsius and farenheit values that are equal to one another using a loop. use C 0-20 and convert to farenheit.
I have to use doubles for Celsius and Fahrenheit and in the formula. I get a runtime error with the following displayed:
I will display a table of temperatures in their Celsius and Farenheit equivalents.
celsiusfarenheit
import java.util.*; import java.lang.*; import java.io.*; class TemperatureConversion { public static void main (String[] args) throws java.lang.Exception { double celsius;// Temperature in degrees Celsius minimum double farenheit;// Temperature in degrees Fahrenheit
I am trying to create a java file that will print out the temperature in Fahrenheit. This is my code.
import java.util.Scanner; public class TemperatureConverter { public static void main(String[] args) { float temperature; Scanner in= new Scanner(System.in); System.out.printf("Enter temperature in degrees Celsius: "); temperature = in.nextInt(); //Getting a red X next to this line. fahrenheit = temperature * 9/5 +32; //Add this line System.out.printf(+temperature + " degrees Celsius is " + fahrenheit + " degrees Fahrenheit."); //System.out.println(temp1 + " degrees celsius is " + fahrenheit + " degrees Fahrenheit."); } }
I need to know what I am doing wrong. Using Eclipse as my platform. I have entered comments where I am getting red X's.
The error I get when I run the program.
Exception in thread "main" java.lang.Error: Unresolved compilation problems: fahrenheit cannot be resolved to a variable fahrenheit cannot be resolved to a variable at TemperatureConverter.main(TemperatureConverter.jav a:24)
I am trying to write a program converting Fahrenheit to Celsius using a for loop. I get it to run and Fahrenheit goes to a hundred. My issue is that the Celsius just says 100 down the column and is not converting. I have tried messing with it, and can not figure what is wrong with it.
import java.util.Scanner; public class Controlstatement { public static void main(String[] args) { double F = 1.0; double Celcius = 100; System.out.printf("%s%20s", "Farenheit", "Celcius" ); for (int Farenheit = 0; Farenheit <= 100; Farenheit++) { F = Celcius * (Farenheit - 32 * 5.0/9.0); System.out.printf("%4d%,20.2f", Farenheit, Celcius); } } }
<import javax.swing.JOptionPane; public class TempCalc {
public static void main(String[] args) {
//Confirming which conversion to compute. String FarOrCel = (JOptionPane.showInputDialog("Would you like to calculate a Farenheit value or a Celsius value? (Enter Farenheit or Celsius)");
[Code] ....
So I've been trying to come up with a Farenheit to Celsius converter and back. However, whenever I run the program in JCreator it never recognizes the string "Farenheit". Even if I put that exact thing (I copy/pasted from the if (FarOrCel == "Farenheit")) it keeps asking me for a Celsius value.
[quote name='INNOCENTREAPER##!' date='28 September 2014 - 07:40 PM' timestamp='1411958437' post='2057072']
<import javax.swing.JOptionPane; public class TempCalc { public static void main(String[] args) {
//Confirming which conversion to compute. String FarOrCel = JOptionPane.showInputDialog("Would you like to calculate a Farenheit value or a Celsius value? (Enter Farenheit or Celsius)";
