Alert Returns Added String Instead Of Adding Var Together
Jan 28, 2014
The following alert returns an added string instead of adding the var together to give me a total?
var tvHours = prompt('How many hours of Tv do you watch last week?');
var webHours = prompt('How many hours of internet surfing did you do last week?');
var gameHours = prompt('How many hours of video games did you play last week?');
alert(tvHours + webHours + gameHours);
Also can you store a var in an alert? e.g ( var time = alert(tvHours + webHours + gameHours); ???
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Dec 16, 2014
i am trying to write a class method which will take in a string and returns a string which is the reversed version of that string. it compiles fine but when i try to run it it states Main method not found in class StringReverse,please define the main method as public static void main(String[]args). I am new to java and cannot figure out
import javax.swing.JOptionPane;
public class StringReverse {
public String reverseString(String str){
JOptionPane.showInputDialog(null,"Please enter word");
char c = str.charAt(str.length()-1);
if(str.length() == 1) return Character.toString(c);
return c + reverseString(str.substring(0,str.length()-1));}}
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Apr 29, 2014
So, I don't know how to start off this program. I'm not looking for the final answer, but I don't know two things: 1. the objective, 2. what type of thing do I start it off with? A method? I'm pretty sure it's not a class right because it already has a class?
public class WebFarm
{
private ArrayList<Server> servers;
/* constructors and other methods and instance variables not shown */
}
public class Server
[Code] ....
the Instructions:
The ping() method of the Server class returns true if the server is currently functioning normally; otherwise it returns false. Write a definition for the needsAttention() method of WebFarm that returns an ArrayList containing the servers that are not functioning normally:
public ArrayList<Server> needsAttention()
{
//I can put code here
}
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Jan 30, 2014
I have doubts in string declaration. As I know we can declare string in two ways:
1. String a=new String("Hello");
2. String b="Hello";
What is exact difference between them? Another thing is when I check (a==b) it retuns me false, but when I check a.equals(b) it returns me with true. Why So?
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Oct 25, 2014
I must write a method that accepts a string and returns an int. The method should sum the unicode values of each character, so the string "ABC" should return 198. Also the only string class methods I'm aloud to use are length, charAt, and substring. I just don't know how the get the Unicode value.
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Feb 6, 2014
I'm trying to get the jsessionid cookie value using the following line in my jsp. It always returns empty string. Is this correct behaviour?
response.encodeURL("")
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Jul 31, 2014
I'm training myself with the EJB 3 technology. I would like to create a stateless bean that instead of returning a String, it returns an object. I tried in the same way I did with the first exercise, but I'm getting several errors.
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Dec 28, 2014
I'm doing a problem where the area of a triangle is returned (if valid). However, I want to return a message (i.e. 'triangle is not valid) if the triangle is invalid.
I'm not sure how to go about to doing this as my method (called area) will only let me return doubles. Possible to return a string in an else within my area method?
public class MyTriangle {
public static void main(String[] args) {
//triangle is valid if the sum of any two sides is bigger than the third
System.out.println(isValid(3, 4, 5));
System.out.println(area(543, 4, 5));
[Code] ...
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Sep 27, 2014
How do i add a ratio into this program. it needs to find the ratio from lowercase to uppercase.
import java.util.Scanner;
public class Strings
{
public static void main(String[] args)
[Code]....
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Sep 8, 2014
Im making a simple code to add an array to a List (the code im referring to is <String> )
import java.util.*;
public class L5_ArrayListProgram {
public static void main(String[] args){
String[] things = {"lasers","ghouls", "food", "dark"};
List<String>list1 = new ArrayList<String>();
for(String x: things)
list1.add(x);
My simple question is - what are the <String> ...<String> for? I understand it makes the list1 variable a string, but why is it made like this? do we usualy use <String> when we need to make a variable a String?
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May 5, 2014
I'm having an issues with adding integer values to a string list. The question is asking me "the method should iterate over runners, and for each runner generate a random number between 90 and 180 (inclusive) which should be used to set the time (in minutes) for that runner."
I have been able to get the random number and iterating over the runner arraylist but I haven't been able to figure out how to add the values generated into the runners list. I am also using BlueJ.
Here's the whole code I have at the moment:
import java.util.*;
import java.io.*;
import ou.*;
import java.util.Random;
/**
* Write a description of class MarathonAdmin here.
*/
public class MarathonAdmin {
// instance variables - replace the example below with your own
[Code] .....
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Feb 7, 2015
i'm trying to add new value (string type) in an existent file.say that we have a .txt file which contain "mario"...i ask to the user a new name, and he write for expample "tony", now i want append the word "tony" in the existent file in this way: Iwrote this code:
Java Code:
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
[code]....
first is saved next to the value existing. why? maybe because the program does not check if there is a string in the file?but I do not think. because otherwise it would happen with any name that is not entered in an odd position.
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Jul 5, 2014
I have an empty string and I want to add to it crosses and naughts. I want to simulate a board of TicTacToe game. My goal is print out 5 strings like this : "xox xxx oxo". There are 3 groups of symbols separated with a space. The crosses and naughts are filled randomly.
Random rand = new Random();
char[] characters = new char[] { 'x', 'o' };
int numOfTimes = 0;
while (numOfTimes < 5)
{
String board = "";
String space = " ";
for (int group = 0; group < 3 ; group++)
[Code] .....
Why my code doesn't output the desired result ?
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Apr 26, 2015
I am creating a .jar for a game I made. I'm not using any dev tools, just a DOS console call to java: %~dp0....javajdkinjar.exe -cfmv TheSwarm.jar manifest.txt *
My manifext.txt contains:
Main-Class: Game
But when I compile the jar, its manifest contains:
Manifest-Version: 1.0
Created-By: 1.7.0_01 (Oracle Corporation)
And I get an error about it not finding the main class. Shouldn't my Main-Class setting be added to the jar? I can manually rename it to .zip and edit the Manifest.MF but that is a huge pain when I'm testing the .jar file and regenerating it often.
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Feb 13, 2014
I have the following code. how can items be added to that list?
private List<IComponentNode> comp;
interface IAAAView {
// returns component with given code or null
IComponentNode findComp(String a);
// returns component with given renderer or null
[Code] .....
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Nov 8, 2014
I am trying to create a form where my customer can add some other fields(like: label,textbox), and he need to use that added fields for the next time he open the application...
I would like to know whether it is possible to save dynamically created controls and reuse it again...
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Nov 4, 2014
I have a ace:dataTable which contains a variable number of columns. For this I use the c:forEach tag. All generated in the c:forEach are not displayed. In the sample, only columnLibelle and columnSum are displayed.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
[Code] ....
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Feb 13, 2014
I'm just a java beginner. I've spent a lot of time installing and configuring software. I'm using Netbeans 7.3 on Windows 7, 64 bit. Recently, I downloaded opencsv from sourceforge.
With no previous experience adding libraries, I read a blog post on adding the library. I think that I then:
Start a new project.
Right click on libraries
Add jar/folder
Gave the temporary path to the .jar file
After, I read the blog post again, and realized I'd missed it. This time I did:
Right click library, Add library, Create library
However, I kept getting a message that the same library already existed. If I do the first process above, I will find the same library.
However, I see no way in Netbeans to remove it. I've deleted the test projects. And started a new one. But the library now exists for all projects it seems.
I've grepped all the files under the Netbean directory, searching for "opencsv", but found nothing. The only things in the Windows registry were locations of files.
How can I delete this library permanently from Netbeans? Short of, uninstall, then reinstall? Is there a way to list all the libraries that Netbeans has?
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Jan 21, 2015
I am writing a program for finding the profit made after paying the broker. here is my code, I am wondering why Java
Code: paidBroker = commission + commissionAfterSale; mh_sh_highlight_all('java');
is being added to
Java Code: noProfit = profit - paidBroker; mh_sh_highlight_all('java');
Here is my full program, you can find these lines of code on lines 64 and 70.
Java Code:
import java.util.Scanner;
public class StockTransaction {
public static void main(String[] args) {
// TODO Auto-generated method stub
//Variable Declaration Section
[Code] ....
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Apr 27, 2014
My panel named panelIncomeInfo are not showing the components that I have added.
public class PayrollGUI {
private JPanel panelIncomeInfo = new JPanel ();
private JPanel panel = new JPanel ();
private JPanel panelPayCheckInfo = new JPanel ();
private JButton close = new JButton ("Close");
[Code] .....
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Oct 26, 2010
I have a .jar that is installed in other computer(outside netbeans). Everything works fine except with report. I am sure the libraries needed for iReport is added in my lib folder but I receive this error message when I to load the report using the program.I use command prompt to see the error:
Java Code:
java -jar projCosting.jar mh_sh_highlight_all('java');
And here is the error message:
Java Code: net.sf.jasperreports.engine.JRException: Error compiling report java
source files : [b]D:CostingRptCosting_1288072391310_955208.java[/b]
at net.sf.jasperreports.engine.design.JRJavacCompiler.compileClasses
[code]....
I have included the library in lib folder but do you think I have to install the iReport application?
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Nov 14, 2010
I am adding JLabels to my JPanel, and the last one always does not show up. For example if I add 3 JLabels, the 3rd will not show up. If i change it to add 4, the 4th will not show up, but the 3rd will now. Here is a snipit of what my code looks like:
setLayout(new BorderLayout());
for(int x=0; x<PEDALCOUNT; x++)
{
pedals[x].setBounds((x*PEDALWIDTH),0,PEDALWIDTH,PEDALHEIGHT );
add(pedals[x]);
}
A workaround that I DO NOT want to keep doing is to put an extra fake JLabel at the end of the for loop, that way everything I want to show up does, but the fake one does not.
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May 6, 2014
I have been playing around all day trying to get this to increase the value of number by one after each new runner is added. How to get the value of number to increase after each record is added?
public class Runner
{
/* static variables */
/* instance variables */
private int number; // runner's number
private String name; // runner's name
private String ageGroup; // standard, junior or senior
private int time; // runner's marathon time in minutes
[Code]...
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Aug 25, 2014
On jsp page i have created table with dynamically added rows now i want to insert the data from dynamic row field into database. How would I get the ids of those dynamically created rows to insert into database using hibernate.
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Feb 14, 2014
I am new to java and during my classes we built a basic calculator. I want to extend my calculator and added function to square numbers.Here is my program:
Java Code:
package calculator02;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
[code]...
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Feb 27, 2014
In the code below, under calculations, I have x=totalPrice+xXxXxX. Obviously the x's were just place holders, but I wanted to know if there was any way to add something there so the program would tally the totalPrice, store it in the x variable outside the loop, so when the loop ended it would display the total price from all the loops added together where I have System.out.println("TOTAL OF ALL ORDERS: $"+ round.format(x)); at the very end.
Java Code:
import java.util.Scanner;
import java.text.DecimalFormat;
public class ModifyOrderV2TEST
{
public static void main(String [] args)
{
//Rounding
DecimalFormat round = new DecimalFormat("0.00");
[Code] ....
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