Label Refresh Function Does Not Work With ACM Package
Feb 8, 2014
I'm trying to setup a function that takes input from a user and prints it onto a label and updates it per entry. The updating would occur through removing the old label and then adding a label with the updated value. The text would be center-aligned. While I'm able to get the label to print the current value of "entry", it does so without removing the label with the old value.
I tried reversing the add(label) and remove(label) to see if there is a syntax error with remove, and I determined from the label not being there at all that remove was called correctly. I have kept the loop infinite for debugging purposes to work with various test cases as they come to me.
Java Code:
import acm.graphics.*;
import acm.program.*;
public class testCanvas extends ConsoleProgram {
public void run() {
GCanvas canvas = new GCanvas();
add(canvas);
String entry ="";
I'm doing a software Java GUI - JFrame form like this:
1. The user wants to click on a button that opens a bunch of images that will be displayed as thumbnail in the bottom of the JFrame . 2. Then the user wants to select/click one of the thumbnail and make appear the corresponding image in it's original size on above(center) of the JFrame.
For doing this I used 3 JPanel.
One contains a JButton that opens the jfilechoser dialog window, the second "panelPreview" is for putting the thumbnails created, and the third "panelGrande" is for the image in it's original size.
The firs part "1." is ok.
But in the second part : I got one error when I want to put the ImageIcon in to the JLabel with the further intent of displaying it.
lblBig(imgIcoVett[i]);
In this project I'm dealing with arrays of ImageIcons and JLabels, so it's a bit advanced level for me, so I'm not sure that I wrote right the part of the MouseListener too.
The error displayed by netbeans says "cannot find symbol symbol: method lbl (ImageIcon) local variables referenced from an inner class must be final or effectively final"
Here I attach the project I did with netbeans"AAAD Unlayout 2.zip", but if you just need the highlight of the code, here it is too:
My working directory is e:ajava. in package p1 i create two classes c1 and c2. net beans creates three files e:ajavap1srcp1, e:ajavap1srcc1, e:ajavap1srcc2. package runs without a hitch. i create another package p2 under e:ajava. i want to use class c1 in p2. pray what on earth should be my import statement in the p2 source code after the first statement 'package p2'. another related querry what should i include in my class path so as to gain access to c1 and c2 in source code of p2.
I need a code to get a text from a textField to a label but the label is on a different frame, i will give u an example of what i have so far. so this is the main:
package albaestate; public class AlbaEstate { public static void main(String[] args) { Frame1 first = new Frame1(); first.setVisible(true); }
/*[B]now i have the first frame where i input the information[/B]*/
package albaestate; public class Frame1 extends javax.swing.JFrame { public Frame1() { initComponents();
[Code] ....
What i need is to input the code so that in jLabel5 i get the text from jTextField1 in Frame1; in jLabel6 i need the text from jTextField2 also in Frame1; and in jLabel7 i want to display the calculation of what the jbutton1 in Frame1 is calculating.
Let's say hypothetically you're making a huge program and use a lot of imports (ex import java.util). If you only need a few specific things from java.util, will it use more memory importing java.util.* compared to only importing lets say java.util.Scanner, java.util.ArrayList, etc. Basically does importing a whole package use more (if any at all) memory than only importing specific package parts?
1-I'd to be able to refresh my page. currently I've set it so it doesn't refresh so I can draw but I want to introduce timed refreshment for example after 30 seconds of drawing the page goes blank and starts again.
2- I'd like to introduce a maximum amount you can draw per each refreshment. E.g the page reloads every 30 seconds and each 30 seconds you have 100 ellipses you can draw, when it refreshes you have a new 100 ellipses
My code below...
PImage bg;
int cNum = 1; void setup() { // Images must be in the "data" directory to load correctly size(1200, 800); bg = loadImage("User_T_1.jpg");
I want to know the how to refresh the jsf application after doing something like Faceboook... i.e if i comment or post in my application so automatically the whole application have refresh.
I created this JTextArea with some text in it. And it also has few variables.
Sth like that:
Java Code:
protected JTextArea textLog; textLog = new JTextArea(); textLog.append("test: "+variable); mh_sh_highlight_all('java');
And now while I use button that changes variable value, in textLog variable still shows old value.
Tried to use remove(textLog); textLog.validate(); etc(remove, validate, revalidate, add, repaint), because it works fine with JButtons, but still, in textLog variable gives me old value.
like "you should use somethingvalidate(); while clickin button and it will works", not some shit for 3032 lines with 99% of code that I don't need to do what I want.
In the header I have a combo list. At each change in value in the combo list I have an Ajax request that updates the data in the Body. So far everything is working properly. Now the home screen's structure should be change when the value of combo list change. To do this I have :
- 1 ManagedBean HomeBean that manage the home - 1 ManagedBean HeaderBean that manage the header - 2 object HomeScreen1.java and HomeScreen2.java that allows me to valued data from each screen - 2 services HomeScreen1Loader.java and HomeScreen2Loader.java that manage loading of each type of screen - 1 template home.xhtml - 2 fichier home1.xhtml et home2.xhtml
When I log in to the application, I get the good page corresponding (Element type 1 => home page 1). But when I select a type 2 item, the actionListener methode is execute, ManagedBean's data was updated (for type 2 screen) , but the page does not updated. What do you do ?
I want to use the bit of code below to re-write the page to tell the user of a successful registration and then redirect them to another page. My problem is that I can't figure out how to get the path right for the login page. As can see, my first choice was to have the use click to the login page and when I use href it works fine.
I tried to use the entire file page starting at C and that didn't work. I also tried
${pageContext.request.contextPath}/Login
which is what I had to do for the action in the form for the login servlet page.
My question is what is the URL I need to use. By the way, if I jut put in google's URL, or any other for that matter, it works fine.
As you can see above tabTwo has a separate fxml included within.
Now some of the tab content in tabTwo needs to be refreshed based on the actions performed in tabOne. But however initialize method of included tab action class is called only once for the first time when the fxml page loads. How the initialize method of tabActions.fxml can be forced to execute every time the tab loads?
find out why when I access the site for the first time, it loads a blank white page, but when I reload it, it forwards me to the home page as it should.
I doubt that the reason is nothing else than the code below (in the doGet method):
I suppose it's something with the session... because after I reload it, it works. But! When I close the browser and start all over again, the main page is white-blank again... And after a reload it works.
The exception:
SEVERE: Servlet.service() for servlet [first] in context with path [/MYSITE] threw exception java.lang.NullPointerException at controller.Controller.doGet(Controller.java:42) Line 42 of the Controller is "for (int i = 0; i < cookies.length; i++) {"
P.S. I cleared all the cookies, but the problem persists.Also, the first it loads, it prints in console:
"null been here 4!"
But, if I reload further, it prints:
"null been here 4! been here 2! No Email! Literally, doGet!"
I am trying to plot a graph and graph should display when JButton is clicked. To create data set, I am taking some value through JTextField and then created a chart and plotted it. I've got a problems: the chart doesn't refresh when I change the text field value.URL....Here is my program:
public class Test2 extends JFrame { /** * */ private static final long serialVersionUID = 1L; private JPanel contentPane; private ChartPanel chartPanel; private JTextField textField_1; double a;
I want to add a button who refresh the tree the problem that i have not "DefaultTreeModel" in my class to do this ((DefaultTreeModel) jTree1.getModel()).reload(); and i try this jtree.updateUI(); but not work ....
I am trying to plot a graph and graph should display when JButton is clicked. To create data set, I am taking some value through JTextField and then created a chart and plotted it. I've got a problems: the chart doesn't refresh/update when I change the text field value.
public class Test2 extends JFrame { /** * */ private static final long serialVersionUID = 1L; private JPanel contentPane; private ChartPanel chartPanel; private JTextField textField_1; double a;
I have a JSF page (called MainPage) with a commandButton: clicking on it, I open a modal panel with a <Rich:fileUpload> component, related to a listener in corresponding bean.
When I start to upload a file, page MainPage starts to refresh, but I would like to prevent this because it's not necessary.
I tried to "play" with <Rich:fileUpload> property values, but nothing seems to work and I don't know what to do anymore.
import java.applet.*; import java.awt.*; import java.awt.event.*; public class number2 extends Frame { int x = 0; int y = 0; public void run() { addMouseListener(new mymouselistener());
my new class had me download eclipse and for some reason it won't let me type anything until I create a document. creating a document creates a package and that lets me create a class which then it will let me start typing code...so wtf is wrong with eclipse and why is it bulling me into having this "package" line in my code when I never had anything like that in other ide's?
I would like to be able to draw things onto the panel (via paintComponent), but I'd like it to draw 'on top' of what's already there. The default seems to be that it resets every time I call repaint.
I am busy programming a clone of the popular phone game they had on Nokia cellphones a long time ago called Snake II but since I know very little about programming I will be using ASCII graphics instead of a 2D graphics engine.
My idea for implementation is having a main class called game which should refresh a grid of ascii characters every, say 0.2 seconds. Then I have another class called Dot. Each Dot object has x and y coordinates, and a direction in the x and y planes (dirx = -1 means left, dirx = 1 means right, diry = 1 means up, diry = -1 means down, and obviously the snake cant move the diagonals)
The Game class prints a "*" symbol where the Dot is, and what I'm trying to do is get the screen to refresh (I think I need to use the sleep() function for this to slow the game down to a reasonable pace), and go in the direction it is supposed to go.
(I haven't programmed this in yet but the snake will be an array of Dot, and at each refresh Dot at position 0 will pass it's coordinates and direction to Dot at position 1, Dot1 to Dot2, Dot2 to Dot3, etc.
Here's my code so far:
A first class called Game.
Java Code: //Not done yet but this is the start to my game of Snake. Basically the class Game generates a Grid of ASCII characters
import java.util.Scanner; public class Game { public static void main(String[] args) { Scanner keyboard = new Scanner(System.in); final int WIDTH = 79;
[Code] .....
My problem now is that I am taking input from the Scanner class. What it does is wait for my input, then it goes on to executing the rest of the code in other words refresh the ASCII grid. This is a problem because I need the snake to keep moving at constant pace while listening to the keyboard.
How can I get my while loop to keep going (i will add a sleep() function later) while listening to the keyboard without stopping?
