Handling Button Events In Eclipse Standard 4.4 / Java?
Jul 20, 2014
Code:
package button;
import javax.swing.*;
import java.awt.event.*;
public class Actions extends JFrame implements ActionListener
{
JPanel pnl = new JPanel();
[Code] ....
Errors:
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
The type Actions must implement the inherited abstract method ActionListener.actionPerformed(ActionEvent)
event cannot be resolved
event cannot be resolved
at button.Actions.<init>(Actions.java:4)
at button.Actions.main(Actions.java:9)
I am new to JSF, trying to customize the primefaces picklist, I want to update the picklist Source List dynamically on certain events like onclick or change?
I tried to write an Listener and populate the dualModel, the call is going to the method and List is getting updated but in UI, the old list is only maintained . I have also asked this question in stackoverflow ,
Refer this link for further details : stackoverflow [URL] .....
I have studied about the hierarchy of exception classes in which Throwable class comes at the top and two of its direct subclasses are Error and Exception..I just want to ask if in some code snippet we throw an instance of Error or its subclass within the try catch block then will that be also called "exception handling" ? I am asking this because Error class is not a child class of Exception therefore cant be said an Exception, therefore handling the same should not be called exception handling
I was wondering how Java knows where to Import classes from when we don't specify the whole directory path.
For example: import java.util.* Does It automatically search In both your current directory and the directory created during Installation that contains the standard library (wherever It may have been Installed) ?
I am facing NoClassDefFoundError with one of the java standard platform class (java.text.DigitList$1)
java.text.DigitList class is part of rt.jar so it should not create any issue as such.
I am using Java 1.6.0_06
StackTrace: Unhandled exception java.lang.NoClassDefFoundError: java/text/DigitList$1 at java.text.DigitList.shouldRoundUp(DigitList.java:4 11) at java.text.DigitList.round(DigitList.java:363) at java.text.DigitList.set(DigitList.java:351) at java.text.DigitList.set(DigitList.java:272) at java.text.DecimalFormat.format(DecimalFormat.java: 584) at java.text.DecimalFormat.format(DecimalFormat.java: 507) at java.text.NumberFormat.format(NumberFormat.java:26 9)
Server : Java Servlet Client : Simple JSP Communication : Server Sent Events every 1 second Here is the problem.
My code needed the server to send updates every one second to the client as stated above. Hence, I added a while loop with a sleep of 1000 milliseconds in the servlet code as shown below. The following strange behavior is observed:
- While the server is sending updates to the client, and the client window closes by mistake, the server does not stop sending updates It continues sending the data. - When the client is re-opened, it sends data much faster (almost double). For example, the server sends 60 seconds worth of updates (60 updates) in just 25-30 seconds. The server sends faster updates not only for this round of updates, but also for any subsequent updates.
This server behavior is much unexpected. Am I writing the server side code wrong? I have looked around a lot and only found while loop method for modifying the server update interval. Is there any other method which I am missing?
Assume we have 2 files that are input.txt and output.txt Input.txt has Name||Age||email||contact No||Name1||age1||email1||contact No1||name2||Age2||email2||contact no2||etc...
initially the output.txt does not have any record.using a java program we have to make it as
Names in the input file:Name,Name1,Name2,Name3 Ages in the input file:Age,Age1,Age2,Age3 email id in the file: email, email1, email2 Contact no in the file:contact no, contact no1,contact no2
I'm doing this assignment in which i have to write some products in csv file...but as u can see in csv file two products are same "Cooking Oil"..so any method that can add two same product's quantity and their amount and write them in file
import java.util.*; import java.io.*; public class SalesbyTransactionMonth{ private static final String fileName = "Data.txt"; private static final String fileName1 = "sales_by_trans_month.csv"; String line = "";
I know I can calculate the sum of squares as such:
// SumSquares.java: calculate the sum of two squares class SumSquares { static int sumSquares(int a, int B)/>/> { int asquare; int bsquare;
[Code] ....
But how can I modify the code so that it inputs a list of integer values in the range of -100 to 100 from the keyboard and computes the sum of the squares input values. And how would I go about using exception handling to ensure that the input values are in range and are legal integers.
I know I can calculate the sum of squares as such:
// SumSquares.java: calculate the sum of two squares class SumSquares { static int sumSquares(int a, int B)/>/> { int asquare; int bsquare;
[Code] .....
But how can I modify the code so that it inputs a list of integer values in the range of -100 to 100 from the keyboard and computes the sum of the squares input values. And how would I go about using exception handling to ensure that the input values are in range and are legal integers.
[B]import java.io.* ; import sun.audio.*; public class AudioDemo{ public static void main(String[] args) throws Exception
[Code] ....
And I am getting the following errors ...
Exception in thread "main" java.io.FileNotFoundException: E:pppp.wma (The system cannot find the file specified) at java.io.FileInputStream.open(Native Method) at java.io.FileInputStream.<init>(Unknown Source) at java.io.FileInputStream.<init>(Unknown Source) at AudioDemo.main(AudioDemo.java:10)
I'm programming a game in Eclipse using Java for Android. I was wondering if any good example of a Health bar using Images. All I can find is people using the progress bar, but i feel that's unprofessional looking.
My goal is to layer 2 images. 1 being the frame of the health bar, 1 being the value of the health bar. I figured it would be something like moving the value health bar image few pixels over depending on the variable of health.
I am following a tutorial to write a 2d game from scratch in java but when I compile and run my code the application (JFrame) doesn't come up on my screen, it just runs for a second and terminates itself for some reason.
package com.thecherno.rain; import java.awt.Canvas; import java.awt.Dimension; import javax.swing.JFrame; public class Game extends Canvas implements Runnable{ private static final long serialVersionUID = 1L;
im wanting to create a console gui that opens with my program game and people can type stuff in it to run commands as well as a debug option to show when errors happen and have a command to list all availble command.
com.microsoft.sqlserver.jdbc.SQLServerException: The connection to the host localhost, named instance sqlexpress has failed. Error: "java.net.SocketTimeoutException: Receive timed out". Verify the server and instance names, check that no firewall is blocking UDP traffic to port 1434, and for SQL Server 2005 or later verify that the SQL Server Browser Service is running on the host. at com.microsoft.sqlserver.jdbc.SQLServerException.ma keFromDriverError(SQLServerException.java:171) at com.microsoft.sqlserver.jdbc.SQLServerConnection.g etInstancePort(SQLServerConnection.java:3174) at com.microsoft.sqlserver.jdbc.SQLServerConnection.p rimaryPermissionCheck(SQLServerConnection.java:937 ) at com.microsoft.sqlserver.jdbc.SQLServerConnection.l ogin(SQLServerConnection.java:800) at com.microsoft.sqlserver.jdbc.SQLServerConnection.c onnect(SQLServerConnection.java:700) at com.microsoft.sqlserver.jdbc.SQLServerDriver.conne ct(SQLServerDriver.java:842) at java.sql.DriverManager.getConnection(Unknown Source) at java.sql.DriverManager.getConnection(Unknown Source) at jdbc.JdbcSQLServerConnection.main(JdbcSQLServerCon nection.java:25)
try to make a game in this code i am trying to make the basics i have made a mouse it should move the game code is
import java.applet.Applet; import java.awt.*; public class Game extends gameLoop { public void init() { setSize( 854 , 480); Thread th = new Thread (this);
I've got a problem in Eclipse. The below code is a part of my program, used for (re)starting a new game. The 'public static int' statement gives the error 'This method must return a result of type int'..
public static int playAgain(){ boolean validInput = false; do { System.out.println("Would you like to play a game? Please answer 'yes' or 'no'."); String playAgain = input.next();
I'm developing a JavaEE system with several applications on a Weblogic AS (10.3.5) using Eclipse indigo with OEPE plugin. I turned my computer off, turned it back on, started the eclipse, and all of a sudden I get class-path errors all over the place (didn't change a thing).
Now let me get this straight:
1. Say I have an application with one EAR project that contains an EJB project and an EJBClient project (both in the deployment assembly). 2. I have written a new regular Java project, and I want to use it in both the EJB and EJBClient projects (it needs to be visible to them). 3. As far as I know, I can simply add this Java project to the EAR project's deployment assembly, and it will be visible to the EJB and EJBClient projects. 4. This has been working for me so far, but now I get class-path errors and I have to add this Java project to the build path of each project.
How should I set the class-path when using JavaEE technology in Eclipse?
how to change the color of an output element in Eclipse? Can't seem to find it anywhere on the internet.For example, a response to my question 'What color do you want?' could be 'red'. I added an if-statement, which states if input = red, start using a red colored 'X' as string for further output.How do I obtain the color red for my X?? Or isn't it possible changing the color of output elements?
I have recently revisited a program I wrote a few years ago, that runs absolutely fine in the console in Eclipse. However, when I export it as a Runnable Jar File, then open the file on my Desktop, nothing happens.How do I get the program to export so that when I open the file, a window opens that acts as the console (so the program can run in it)?
I've been working quite a bit with a login system the past couple of months and I now have a version that I would like to try "for real" by extracting it as a runnable .jar or .exe file. I've looked at a couple of guides that told me how to do this properly, but even after following every step precisely it didn't work.
One of the guides I tried: 3 Ways to Create an Executable File from Eclipse - wikiHow
Double clicking the file or selecting it and pressing enter does nothing, the computer loads for a second and then nothing happens. I don't receive any visible errors when extracting the program, either.
However, when running the file from the command prompt I do receive an odd error: Microsoft Windows [Version 6.2.9200] (c) 2012 Microsoft Corporation. All rights reserved.
C:UsersUserName>java -jar Login.jar Exception in thread "main" java.lang.IllegalArgumentException: input == null! at javax.imageio.ImageIO.read(Unknown Source) at LoginSystem.Data.updateData(Data.java:347) at LoginSystem.Data.<init>(Data.java:309) at LoginSystem.MainFrame.<init>(MainFrame.java:42) at LoginSystem.MainFrame.main(MainFrame.java:457)
C:UsersUserName>
I must say I don't quite understand the error, it seems to be unable to load an image which is odd considering the program works fine without any errors at all in Eclipse.
