Swing/AWT/SWT :: Making Interface - Exception Group Layout
Sep 24, 2014
I am making an expert system using Jess about animals. I wanted to make an interface using Swing and so I did. I have a problem using group layouts. The application works fine but at the end a exceptions is thrown:
Exception in thread "AWT-EventQueue-0" java.lang.IllegalStateException: javax.swing.JLabel[,0,0,0x0,invalid,alignmentX=0.0,
alignmentY=0.0,border=,flags=8388608,maximumSize=,minimumSize=,
preferredSize=,defaultIcon=,disabledIcon=,horizontalAlignment=LEADING,
horizontalTextPosition=TRAILING,iconTextGap=4,labelFor=,
text=The animal is a cheetah.,verticalAlignment=CENTER,
verticalTextPosition=CENTER] is not attached to a horizontal group
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The application ask the user some questions about the animal. When the expert system has enough information to know the animal it tells the name of the animal and shows a picture of it. The exception is thrown when the application has guessed the animal and shows the response.
package TheWorldCup; import java.util.ArrayList; import java.util.*; public class WorldCup2014{ public static void main(String args[]){ ArrayList<String> WorldCupTeams = new ArrayList<>();
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What it is doing is printing the team name and all eight groups and showing the group is: team name under. I want it to print out the team name, put it into a group and print out the group. Once 4 teams in a group, close that group off, do this until all groups are filled. How can I do this?
How do you make it so that you can select 2 buttons in a radio button group? for example: If I have 7 radio buttons, and I want to be able to select 2 of the 7 instead of 1.
I know checked exception need to be checked at compile time and runtime exception need not be checked at compile time.
My question is not related to the definition.
The question is on what basis have they selected that FileNotFound exception is a checked exception and NullPointerException is an unchecked exception? Is it the random wish of the creator or is there reason behind why something is selected as checked exception and something as unchecked?
The 2 minute drill from page 69 SCJP kathy and bert book, says regarding Interfaces, that - "A legal nonabstract implementing class must not declare any new checked exceptions for an implementation method."
When I try the below given code in eclipse , it does not throw any errors . (Here I have tried to throw NullPointerException from testFunc whereas the interface function throws IllegalStateExc)
package abstracttesting; public class StaticCheck implements check{ public void testFunc() throws NullPointerException{ // TODO Auto-generated method stub } public static void main(String[] args) { // TODO Auto-generated method stub } } interface check{ void testFunc() throws IllegalStateException; }
So I'm doing a basic MVC layout for a pretty basic game that I am making in order to understand the whole MVC layout. The game requires the user to move up/down/left/right via JButtons on the GUI. Since I'm using an MVC layout and my buttons are in a different class than the ActionListeners, I was wondering what the best way to add the action listeners are?
My IDE has a visual editor for creating Swing applications. The created application windows have no layout manager and use method "setBounds()" for placing Swing components on the application window. I have built an application that uses JInternalFrame. Each JInternalFrame is a separate and different "screen" for the user to interact with.
There are around 2,000 screens in the application and new screens are constantly being added as well as existing screens being modified. As a result, the top-level container - a JFrame - is a fixed size and is not resizable. I have now been asked to increase the size of the JFrame while maintaining the proportions of the screens.
Rather than manually editing the invocations of "setBounds()" on all the screens, any alternative way to achieve this? Also, is there a way to achieve this such that if, in future, the JFrame will again be resized, the screesn will automatically adjust?
I'm trying to build a GUI that must look lik on the image above. There must be three JPanles, the one above, with buttons and combo boxes, must have fixed height and all three must have fixed vertical gaps between them. I'm trying laout after layout but somehow it's not working. I'm allowed to use only standard Swing layouts.
I like to adding a scrollbar to a jpanel with flowlayout but is imposible, i don't see the scrollbar. I've tried a thousand different ways but I have not accomplished anything.
Here is my code:
//Creamos el panel que contendra los botones de cada producto diferente package com.foolsrecords.tpv.tablaproductos.vista; //Hacemos todas las importaciones necesarias import com.foolsrecords.tpv.modelo.Producto; import com.foolsrecords.tpv.modelo.eventos.ControladorEventListener;
I have a stage,it has two layers scene, if user click the button,then change to another layer, and also can change back. It just like swing cardlayout. How can i implement cardlayout in JAVAFX?
Am trying to dynamically insert buttons (which will be presenting card in a frame) using grid layout.As shown image is getting inserted but its not fit in button.I tried Darryl's Stretch icon as well but of no support.
For example, say I have I BoxLayout with a few JButtons in it. How could I make it such that I could drag a JButton such that it could be in front or behind the others?
I've thought about using ComponentMover and just switching to a null layout right before moving it and switch it back right after like bellow, but I'm not sure how to make it keep the change in order.
import java.awt.LayoutManager; import java.awt.event.MouseEvent; public class LayoutComponentMover extends ComponentMover { private LayoutManager layout;
I have quite a specific view for how I want my components layed out. No matter what I try I can get them to display how I want! I'm using three JPanels. There's a main panel that goes inside the tabbed pane. This main panel contains two other panels. The First panel is a gridbaglayout panel, with labels on the left column, and components on the right column. The second panel is underneath the second, and contains a label, and a button beneath it. THis uses a basic box layout, with one component per line. The label doesn't always appear (depends if a component is changed). With everything showing, this is how it looks so far:
However, I want the Labels on the left of the pane. The right hand column should be aligned horizontally and have more space from the labels. Ideally I'd like a gap between the last label/checkbox and the Note label.
This is my current code for the panel/s inside the tabbed pane window.
videoPanel = new JPanel(); applyVidBtn = new JButton("Apply Settings"); applyVidBtn.setVisible(false); warningLbl = new JLabel("Note. Applying these settings causes a program restart."); warningLbl.setVisible(false);
I am currently writing a chess application in Java swing. For the GUI part, I have one MainWindow class, and one ChessBoard class. The MainWindow has a main panel, in which is contained 1) a panel containing the chessboard from the chessboard class (a grid layout array of 64 JLabels), 2) a JLabel status bar, and 3) a JList to hold the moves of the game. I have a movePiece method in the chessboard class, which I would like to add the move and question to the moves list, which is contained in the main window class.
However, since JList is some special type, I can't make it static ( that gives me an error ). I also tried creating a method in the main window class to add a move to the list, which I would then access via the chessboard class. However, I can't make the method static, because it is referencing a non-static variable ( the JList ), and since the Main window class already has an object of the chessboard class, trying to create a main window object in the chessboard class creates a stack overflow error.
I have to create a Swing application for which i haved a set of requirements as,
1. there will be two JPanels ,left and right, on the main JFrame , left frame would contain a JTextField and a submit JButton ,user can enter values 1,2,3 ,in the JTextField and presses the JButton
a. if user enters 1, a JTextField will be shown on right JPanel b. if user enters 2, a JTextField and a JRadioButton will be shown on right JPanel c. if user enters 3, a JTextField and a JComboBox will be shown on right JPanel
So I have done that but when my boss sees the code behind this application he told me to make it more extensible i.e. if there is going to be an additional requirement for values 4 or 5 or 6 and so on , then i have to make minimal changes in my code or no change in my code and it should work . how this can be done ? is it possible make such software design ?
public class DesktopApp extends JFrame { private static final long serialVersionUID = 1L; private static final Logger logger = Logger.getLogger(DesktopApp.class); private JPanel jp, jp2, mainPanel; private JLabel jl, jl1, jl2, jl3, jl4, jl5; private JTextField jText, jText2, jText3, jText4;
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What wrong am i doing here in this code which in not considered to be an extensible design ?
I've got to make a ball bounce around a screen.... From what I can gather they seem to hold back useful java code.
anyway, i've changed the code over and over, and think this is the most succinct way i can manage it. but i have a problem. where i've marked the code (*****) and the following line are conditional on each other. so one won't provide the correct answer without the other line executing first, and vice versa (ignore the code after, i haven't looked at where that should be yet ). Anyway I don't really want to rip the code apart, again, because i'm pretty sure it's close.
Now my issue is I have a JTable. The first column will contain Date objects all the way to the bottom. I want the JTable to display only the month and year. I created a custom cell renderer, but it appears the cell renderer method "getTableCellRendererComponent" is never called. (I tested it using System.out.println();) Here is my code for setting the cell renderer and the contents of the first column:
MonthYearTableCellRenderer renderer = new MonthYearTableCellRenderer(); tblView.setDefaultRenderer(Date.class, renderer); for(int i = 0; i < 60; i++){ Calendar cal = Calendar.getInstance(); cal.set(Calendar.DAY_OF_MONTH, 1); cal.add(Calendar.MONTH, i); tableModel.setValueAt(cal.getTime(), i, 0); }
The Date objects are set into the cells of column 0 correctly. The table shows the result of the "toString()" method for each cell in that column.
basically I would like to know how to to the following Java. Example... Say I have one JComboBox, and it is populated with 10 items which reads from a text file ("apple","banana","kiwi","orange","grape fruit"), and the other JComboBox holds the price ($1,$2,$4, etc etc...you get the drift).
How do I make in such a way when I select for example banana from the JCombobox that it syncs the other JCombox to the correct price?
Basically syncing the two JCombobox so that you do not need to select the price yourself - it does it automatically for you.
My question is, how do I get my Cube to visualize in the JPanel? I've tried a bunch of add methods but they don't compile. Is there a proper method I can use to add an object to a JPanel?
I have made a window using JFrame and on my JPanel I have added 3 components: 2 JTextFields ("field1" and "field2") and inbetween them a JButton ("switch"). My goal is to switch the value of field1 to field2 and vice versa when the JButton is clicked. I thought this ActionListener which I have added to my JButton would achieve my goal:
public void actionPerformed(ActionEvent e) { field2.setText(field1.getText()); field1.setText(field2.getText()); }
However, it changes the value of field2 into the value of field1 but not the other way around.
What I'm trying to do is show a loginscreen. After logging in it should show another contentpane with actual content.
This is my main class:
public class Project extends JFrame { public static void main(String[] args) { JFrame frame = new Project (); JPanel paneel = new Paneel (); frame.setSize (800, 600);
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The compiler gives me an error when I try to refer to "frame". What I've tried to do is refer to frame by using Project.frame but it still gives me the same error. The compiler shows the message that it cannot find "frame" in class Project, but that's exactly where it is!
Is there a simple way to make this work? I've read about threads and loops but they don't seem the most basic solution. Maybe there's a way to get the current frame so I can use that?
