Converting Input From Textbox Into Int?
Apr 8, 2015
Here is my code, basically I'll tell you what my program is suppose to do, I want to be able to leave the text box's empty if I like I want to skip 1 or more or all if I like skipping just basically means 0 but getting this error, it's forcing me to type in them all.
Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(Unk nown Source)
at java.lang.Integer.parseInt(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at StockControl.addToStock(StockControl.java:86)
[Code] .....
My code :
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JTextField;
[Code] .....
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Apr 2, 2014
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);
}
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May 2, 2014
I am supposed to write a program on PuTTY using UNIX (I have Windows 8), but I am not comfortable with it yet, so I am using Java through NetBeans (IDE 7.4).
The program has to follow these instructions (ignore the Linux part of the instructions, the rest is in bold):
Write a program on the Linux system using the putty utility. The program should get strings of data from the command line (that is, look for the data in the "args" array of strings). Use a loop to convert each of the strings in the array into a double and add the number to a total. Print the total after all of the strings have been processed.
The program will use try-catch to catch any error that occurs. If an error occurs, the program will print a message saying that the error occurred. The program can end at that point.
You should create the Java program using the nano editor. The input data should be a list of numbers on the line that runs the program.
The problem so far is that I keep getting an error when converting a String value into a new double value. I have yet to code the try-catch method in my program
Java Code:
import java.util.*;
public class Program13Strings {
public static void main(String[] args) {
Scanner scan = new Scanner (System.in);
System.out.println("How many lines of data do you wish to enter?");
int size = scan.nextInt();
[Code] ....
*NOTE: right where my code says double newDouble = Double.valueOf(newResponse); is where the error is occurring.
*ERROR: Exception in thread "main" java.lang.NumberFormatException: For input string: "abc"
at sun.misc.FloatingDecimal.readJavaFormatString(Floa tingDecimal.java:1241)
at java.lang.Double.valueOf(Double.java:504)
at program13strings.Program13Strings.main(Program13St rings.java:21)
Java Result: 1
How can this be fixed so I don't get this error?
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Sep 7, 2014
I am new to java and programming in general. I figured out how to convert an integer input to binary however I am having issues doing the opposite of converting a user input binary number to a decimal.
I need to do this with basic math (or string depending on how I represent the binary) and no functions.
I know how to convert binary to integer on paper but I am having a hard time working it out in java.
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Jul 8, 2014
I am trying to make a program that calculates the change due in dollars and cents. The user inputs both the amount due and the amount tendered. My program only works with whole numbers?
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Mar 4, 2014
Is this even possible? I would like to make it so I can drag drop an image into a textbox . . .
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Oct 2, 2014
I could get my session values in my jsp, now I want to compare the session value whether it matches the textbox, if it matches, it will redirect the user to another page else it will remain the same page.
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Mar 29, 2014
<input type="text" name="test" class="form-control input-sm" maxlength="20"/>
This is my textbox can i include in my tetxbox that it will no accept special characters?
Can i configure it there? like maxlength="20" w/c is character limit is set to 20, not allowing special characters be configure like that , character="speical is not allowed" something like that?
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Apr 24, 2014
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<fmt:formatNumber type="currency" value="12345.6789"/></p>
<input type = "text"/>
This one is working if i set value in fmt but what i want to happen is when i enter a number in textbox it will be fommated on the format that i want, so i think i need to an of og text and set it into value of fmt? <y plan is when I enter a number in textbox it will automatically formatted ....
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Apr 24, 2014
This is my modalPanel code:
<rich:modalPanel id="createManagedObject" moveable="false" autosized="true" width="500" rendered="true" domElementAttachment="form">
<f:facet name="header">
<h:panelGroup>
<h:outputText value="Create Managed Object"></h:outputText>
</h:panelGroup>
</f:facet>
<f:facet name="controls">
<h:outputLink onclick="#{rich:component('createManagedObject')}.hide(); return false;">
[Code] ....
As shown in the above code:
I have following components in ModalPanel:
1) ComboBox
2) Instance
3) Save and Cancel
I wanted some validation here :
For example:
- The Instance Text box and SAVE button should be disabled. When the pop up appears.
- The Instance Text BOX gets enabled only when any selection happenes in COMBO Box
- The SAVE button gets enabled only when COMBO BOX and INSTANCE TEXT BOX is filled.
- Let the CANCEL button be enabled always.
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Mar 30, 2014
I need to design the layout of this calculator and also add one more button that clears textbox strings one by one instead of whole.
import javax.swing.*;
import java.awt.FlowLayout;
import java.awt.event.*;
public class Calculator extends JFrame{
double value1;
double value2;
String operator;
double result;
[Code] .....
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Nov 12, 2014
I am trying to write a program that will generate a QR Code from an input text and also display some information about the input/output bits. So far I have created the frame and what to do next. And I'm not sure if I am on the right track since my level of programming is not that great. By the way, I am using zxing libraries from GitHub. I know, there are plenty of generators online for the QR Code, but that is not what I am looking for. As you can see on the attached image, I am more interested in the efficiency of encoding 2D data. Also, I noticed that almost all the online projects regarding 2D codes are for Android. Which is not very useful.
// QR Code Generator
package qrcode;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.EtchedBorder;
import javax.swing.border.TitledBorder;
[Code]....
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Nov 3, 2014
I'm very new to Java and looking to expand knowledge base from Excel VBA..I'm looking to add or analyse data from a csv file in a time order fashion. i.e i want to keep/ add a cumulative total. (once i've achieved that i then want to look at a java equivalent of sumif...
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Dec 22, 2014
I'm converting from ASP to Java for a legacy site. I believe the first part of the if statement is right but I'm having an issue within the else staetment. I'm getting date is undefined, I've tried using getYear and getDate but have not been successful.
ASP:
If Request("action") = "results" Then
aMonth = Request("selMonth")
aDate = cint(Request("selDate"))
aYear = cint(Request("selYear"))
Else
aMonth = UCase(MonthName(Month(Date()),true))
aDate = Day(DateAdd("d",-1,date()))
aYear = Year(Date())
End If
[code]....
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May 16, 2014
I try to use below codes to convert Hex String "1111737999630745" to ASCII.
When I read the result in Notepad++ with HEX-Editor plugin, I find attached image which is different from above String, there is one additional c2 and I am quite confused.
Java Code:
public static void main(String[] args) throws IOException {
Test strToHex = new Test();
File file = new File("D:/filename");
// if file doesnt exists, then create it
if (!file.exists()) {
file.createNewFile();
[Code] .....
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Mar 3, 2015
I was reading about the char data type in Java. I know that an unsigned 16 bit integer is used to represent a char. So we can write the assignments below:
char a = 65; // a will get the value 'A'
But the limit of the char value is 65535.
So I've tried out a few things with char and trying to understand them but I'm not sure how they work.
char a =(char) 70000;
char b = (char) -1;
In the first case I thought that 70000 % 65535 would happen internally and the unicode character present at that location would get stored in 'a' but if I do that I get the answer of 70000 % 65535 as 4465. But when I display 'a' it shows me the output as '?'. Clearly '?' isn't at 4465.
In the second case I have no clue what's happening but somehow when I display 'b' it shows me '?' again.
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Jul 14, 2014
So I was going to try to create a program that prompts input and creates a file (That didn't exist before) with that input as name.Then, the program prompts inputs after stating questions such as 1 + 1, then if the user inputs an answer, put "Question # = Correct "or" Wrong.Code SO Far:
Java Code:
import java.io.BufferedReader;
import java.io.File;
import java.io.InputStreamReader;
public class File_Read {
public File_Read() {//File_Read is the Interactive object
[code]....
So that it puts the Correct or Wrong into the file.
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Jan 28, 2014
This is the code to convert string into unicode but I get an error as "illegal start of an expresssion"while running the code..
import java.util.Scanner;
import java.lang.String;
import java.lang.Character;
public class A
{
public static void main(String args[])
{
[Code]...
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Feb 15, 2014
I have this project due and its asking that i print out what type of triangle it is when the user inputs 3 sides. I have most of it done and working, but it pops up different windows instead of using one window for everything. The assignment says it needs all the final info to be in one window. The boolean is coming from another method. I'm unsure how to get it into a string (Or if that's what i have to do). The method must return a boolean true/false.
import javax.swing.*;
public class Triangle {
public static void main(String[] args) {
int side1 = getSides();
int side2 = getSides();
int side3 = getSides();
[Code] ....
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Jan 21, 2015
I'm trying to write something to will convert my Scanner input which will be either a string or a char toUpperCase but it is not working.
import java.io.File;
import java.util.Scanner;
public class UpperCase {
public static void main(String [] args) {
Scanner kb = new Scanner(System.in);
char reply;
[code]....
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May 21, 2014
In my Java class, the last assignment we had to turn in was to create a program that would take a users input and create a new type of animal. I went through the different steps in the instructions, and everything seemed to be going well up until the point where we actually took the users input and created the new animal. Specifically, I kept getting an error stating that I could convert a String to an animal.
I'm attaching the main class (Animal), one of my animal classes (Bird) and the class where I'm getting the error (AnimalStuff). I turned the program in as is, so what's done is done, but I'd like to learn what I'm doing wrong and what I can do better. I do know that the loop in AnimalStuff is wrong as it doesn't work right either, but I'm more concerned about the conversion from String to animal, as the entire program depended on this to work, and it doesn't.
public class Animal {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
}
public static String kind;
public static String integument;
[code]....
Is there anything that jumps out at to what I'm doing absolutely wrong?
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Sep 24, 2014
I've started writing a new program that Scans for some strings. I want to specify a random Integer to those Strings in order to do my desired idea. what should I do?!! my codes are here :
import java.util.Random;
import java.util.Scanner;
public class Draw {
public static void main(String[] args) {
System.out.println("This Program is written to solve little problems in families cause of doing unwanted works!!");
[code].....
now I want to Specify an Integer to each person that has been scanned! for example if the first person is " David " , which is a String, in the next step :
Random randomNumber = new Random();
randomNumber.NextInt(101);
int David = randomNumber.NextInt(101);
I want to what should I do?
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Sep 30, 2014
how to make an applet out of this program but can't seem to do it.
Java Code: import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.JLabel;
import javax.swing.JFrame;
import java.io.*;
import java.util.Scanner;
[code]....
Technically, when you run the program, a gif page appears (that I put as a placeholder) and when you press the letter 'n' JCreator runs the program, displaying a character P on a .txt field made using the Notepad on Windows. You can move it left, right, down, and up andf it will move accordinly. However, each time I make such action, the compiler has to rewrite to whole .txt field with the new position.
My former tutor said that in order for it to be "real-time", we have to use an applet.
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Sep 26, 2014
I'm trying to complete a code to convert decimal to octal. however i can't figure out how to print the output correctly. it should be.. Your integer number 160000 is 0470400 in octal. (160000 is the number you input). My code is...
Scanner input = new Scanner(System.in);
int value;
int a;
int b;
int c;
int d;
int e;
int f;
int g;
String result;
[Code] .....
Lastly, my output prints everything correctly, but the input number always is 0.
Ex error: input= 160000
Your integer number 0 is 0470400 in octal.
it should be.. Your integer number 160000 is 0470400 in octal.
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Jul 15, 2014
how to write the toString to convert this output :
List:
side: 14 color: java.awt.Color[r=0,g=0,b=255]
side: 18 color: java.awt.Color[r=255,g=0,b=0]
side: 12 color: java.awt.Color[r=255,g=255,b=0]
side: 18 color: java.awt.Color[r=255,g=0,b=0]
side: 16 color: java.awt.Color[r=0,g=255,b=0]
side: 10 color: java.awt.Color[r=255,g=200,b=0]
side: 10 color: java.awt.Color[r=255,g=200,b=0]
to this output
side:14 color:#0000FF
side:18 color:#FF0000
side:12 color:#FFFF00
side:18 color:#FF0000
side:16 color:#00FF00
side:10 color:#FFC800
side:10 color:#FFC800
here is how i have it written now
public String toString()
{
return "side: " + side + " color: " + color + "";
}
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Mar 16, 2014
I am taking Python this semester. Our teacher wants us to convert Python to JavaScript without really explaining how or/and expecting us to be familiar with it already.Python Program I have is pretty simple - it prompts you to enter your first and last name and end your DNA string, "CAG" repeats are counted by another function and the result is passed to function that identified weather you may have huntington's decease or not.
<body>
<p>Enter First Name: <input type="text" size="25" id="firstname" value="">
<p>Enter Last Name: <input type="text" size="25" id="lastname" value="">
<p>Enter DNA: <input type="text" size="25" id="DNA" value="" >
<p><button onclick="alertt(f,l,d,c,p)" style="background-color:pink"><b>PRESS TO FIND OUT RESULT</b></button></p>
<script>
[code]...
When I run it there is an issue with countCAG and prediction functions :( I would run each one individually in JS console and I get Undefined, or InvalidString I read that I am supposed to use var in front of each variable, unlike in Python where you just assign variable a value without any add-ons in the front. But JS console seems to recognize both ways of assigning, however var smth=0 immediately evaluates to Undefined, and smth=0, gives me 0...
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