implementing a swings application. I have a JFrame containing 2 JPanels : Top & Bottom panel. Top panel has a Jcombobox, Botton panel contain a Graph plot. On changing value in combo box, graph plot should get updated. I thought of adding actionlistener to Jcombobox. Not sure what to implement in its actionPerformed()
View RepliesI need to add actionlistener to my code which allow the number 1 to 9 to function which are located in the nested for loop.
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class EX_7_2 extends JFrame {
public EX_7_2() {
setLayout(new BorderLayout(5, 10));
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Can I add actionListener to a button component without creating a reference to it? Look at my code below:
public void init() {
setBackground(Color.red);
//Create the layout
setLayout(new BorderLayout(20, 5));
//Add buttons
add("North", new Button("Red"));
add("South", new Button("Yellow"));
add("East", new Button("Cyan"));
add("West", new Button("Magenta"));
add("Center", new Button("White"));
}
Or should I just do the usual instance.addActionListener(this) like myButton.addActionListener(this)?
I need to take the value of what's typed in my JTextField, and once the submit button is clicked, I want to add that string to my JComboBox list items.
Depending which RadioButton they selected, I need to put the team in HOME or AWAY teams, and so on and so on, until they continue clicking submit.
I am trying to implement user input in my dice rolling program but I do not understand where I need to add the actionListener. What I want the program to do is allow the user to click on each roll button and have the output be between 1 and 6. I figured I can put it in the "main" class due to the size of the program but I would like to know the best way to go about adding the actionListener into a sub-class for practice purposes.Here is my code thus far:
package com.jprogs;
import java.awt.*;
import javax.swing.*;
public class DiceGenerator extends JFrame {
DiceRollEvent dice = new DiceRollEvent();
// create the roll buttons
JButton roll_1 = new JButton("Roll #1");
JButton roll_2 = new JButton("Roll #2");
JButton roll_3 = new JButton("Roll #3");
JButton roll_4 = new JButton("Roll #4");
JButton roll_5 = new JButton("Roll #5");
// create output field for each roll
[code].....
I have a class with jbutton declared inside like these:
public class UI{
private JFrame ventana;
private JTable table;
private JPanel panel;
private JScrollPane tableScrollPane;
private JTextField aBuscar;
[Code] .....
I would like to add actionlistener in my JButton's. Where must I declared these listener. How should I do these?
I was working on implementing the game Hunting the Wumpus [URL] .... for one of my projects in College. I've got the major parts of the game already implemented. I am working on creating a start screen right now. But I've run into a strange problem. In my code the main method that draws is the PaintComponent method in the private class HTWPanel. I need the Actionlistener to listen to the "QWES" keys while the state of the game is PlayState.Playing so that the user can enter the direction he's going in. If I have the following code for my paint component, the Actionlistener works fine.
public void paintComponent(Graphics g) {
super.paintComponent(g);
map.draw(g, 100);
}
But when I try to add a start screen (by changing the background color and adding a label called "StartScreen"), the controller only listens to keys while the start screen is showing, not while the game is playing. I'm pretty sure this problem is due to some internal implementation of KeyAdacpter or ActionListener, but I'm not sure what.
public void paintComponent(Graphics g) {
super.paintComponent(g);
if (state == PlayState.START) {
this.setBackground(Color.orange);
this.add(startScreen);
}
else if (state == PlayState.PLAYING) {
if (this.getBackground() != Color.WHITE) {this.setBackground(Color.WHITE);}
map.draw(g, 100);
}
I attached a screenshot of my main class, HuntTheWumpus, and a screenshot of what my game looks like so far. Each square is a different room in the Wumpus's lair. The black rectangles are door representing which direction you can go to. The rooms that are 2 squares or less from the wumpus are colored red. The hunter is represented by the black circle in the upper left hand square. His he can move left right up and down into different rooms with the "QWES" keys.
I was suspecting I had a jButton not working, so I added a console print to test. See below. When I click the button, the console doesn't display anything. Am I using the button wrong?
private void jButtonUpdateItemsMouseClicked(java.awt.event.MouseEvent evt) {
System.out.println("click");
System.out.println(drawPreviousRectangle);//this is a boolean
}
I have also tried the following with the same results (or lack of).
private void jButtonUpdateMajorDeckItemsActionPerformed(java.awt.event.ActionEvent evt) {
System.out.println("click");
System.out.println(drawPreviousRectangle);//this is a boolean
}
is any simple way to apply the same code on both ActionListener and MouseListener, so that the same code is executed when the user either presses a JButton or presses Enter when a JTextField is focused.I know that I can define a method, while it is not preferred as I may use break; in my MouseListener.
A simple example:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TwoListener extends JFrame
{
[code]....
Although I can define a new method that prints out the three numbers, I have to add certain break; code in different cases. So I just wonder whether there is another way to do things like this.
ActionPerformed and ActionListener on Netbeans...If I create a ComboBox on Netbeans using GUI design, then I right click over the Combobox I can find Events - Action - ActionPerformed... but I can't find ActionListener...
Are ActionPerformed and ActionListener the same?
or...
where is ActionListener on GUI Netbeans? Do I need to manualy write the ActionListener part?
I'm trying to acces my variable "cost" so when i press a button it prints the cost(for now) but the int value just prints 0
public class Holiday extends JFrame
{
private RoutinePanel routine; // A panel for routine charge checkboxes
private JPanel HolidayPanel; // A panel for non-routine charges
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I know that JMenu and JMenuItem is suppose to use action listeners but would you consider this implementation an exception?
menuAbout.addMouseListener (new MouseListener () {
@Override
public void mouseClicked (MouseEvent arg0) {
JOptionPane.showMessageDialog (null, "Server Tec Software System
}
@Override
public void mouseEntered (MouseEvent arg0) { }
@Override
public void mouseExited (MouseEvent arg0) { }
@Override
public void mousePressed (MouseEvent arg0) { }
@Override
public void mouseReleased (MouseEvent arg0) { }
});
I am trying to set some serial port parameters here:
public synchronized void connect(String port, String rate, String data, String stop, String parity) throws Exception {
CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier(port);
if (portIdentifier.isCurrentlyOwned()) {
System.out.println("Error: Port is currently in use");
} else {
CommPort commPort = portIdentifier.open(this.getClass().getName(),
2000);
[Code].....
To set the serial port parameters i need to use Integers instead of strings.
So, how i turn my string EG:
String[] baudRates = { "2400", "4800", "9600", "14400", "19200", "38400", "56000", "115200" };
into Integers for my combo box
My database contains path of images that I want my jComboBox to diaplay. I have written the following code but it does not work for comboBox but works fine when I display image on jLabel etc. How should I go about this
try {
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
} catch (ClassNotFoundException ex) {
Logger.getLogger(updatedetail.class.getName()).log(Level.SEVERE, null, ex);
[Code] ....
I am trying to write an application where if you click and hold down on 1 button and move the mouse to another button and release the text on the 2 buttons should be switched around.I have a print line so I can se the text are supposed to get switched around but it is just not happening in the GUI.
I attached all my code in case the flaw was to find somewhere else in the code, but the functionality I am working on is the lines 76 to 121.
import javax.swing.BoxLayout;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
[code]....
I lately started using "advanced" Swing-Components, like JTabbedPane and JComboBox, but I dont get the ComboBox working/This is the code I use:
public class PreferencesPanel extends JPanel
{
public PreferencesPanel (MapEditWindow window)
{
super ();
setLayout (new FlowLayout ());
String[] resolutions =
{
"1024x768", "1280x800"
[code]...
The TabbedPane is placed in another JPanel, which is placed in an Fullscreen-Window.
Now, the problem is, that when I start the application and open the "Preferences"-Tab, everything seems normal, I can see the ComboBox and the first entry is selected. But when I click it, instead of opening and offering me more choices, the program crashes and my screen turns black (I'm using OS X, on Windows it would possibly turn white, but I didnt test this out).
I have posted a class ReadExcelDemo and I have this working correctly and can println and get my desired outcome. Where I am having issues is with taking that data and filling a JComboBox drop down menu which is the last line of code where I am getting the error Array Dimension missing.
package Product.form;
import java.io.File;
import java.io.FileInputStream;
import java.util.TreeSet;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
[Code] ....
This is located in the GUI class.
selectProduct.setModel((new ReadExcelDemo.Castings[]).toString());
// This is another class where I am trying to fill a Jcombobox
I am developing an application using Java Swing on Netbeans using Java DB, In which i want to create a form using Jtextfields & JComboBox.
I already added data in the JcomboBox to select. I already create a database and table for this application. Now i want to insert the data in Jtextfield and selection of Jcombobox to insert into the table i designed for it. How to link the form with the table and insert the data of form in table...
I am trying to use a JComboBox with a simple ListCellRenderer
public class EntscheidendeBehoerdeListRenderer extends JLabel implements ListCellRenderer<EntscheidendeBehoerde> {
private static final Color HIGHLIGHT_COLOR = new Color(0, 0, 128);
private static final long serialVersionUID = -4719965772580952993L;
public Component getListCellRendererComponent(
JList<? extends EntscheidendeBehoerde> list,
EntscheidendeBehoerde value, int index, boolean isSelected,
boolean cellHasFocus) {
[code].....
The JCombox shows and odd behavior, when I point to an item it moves up or down and an empty line appears under the cursor.
I have three JComboBoxes. When the user selects an entry in the first JComboBox the entries in the second are set. For this I use an Action extends AbstractAction which is bound to the first JComboBox.
I have also bound an Action to the second JComboBox.
Problem: this also fires when the entries on the second JCombox are added which leads to a Nullpointer.
I need a Listener which only reacts to user input, and does not react when the model of the JComboBox is changed.
How can I add values from a JComboBox to a JTable ? I've created a drop down list and a button and I want the values to be added to a table whenever i click on the button (add).
View Replies View Related in the SSCCE, the ItemListener is not triggered when I add a FocusListener for it beforehand.How can I make them both function when either focus is lost or when an item is selected?
package testapp;
import java.awt.Dimension;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.sql.SQLException;
import javax.swing.JButton;
[code]....
I am developing a java based software connected with a mysql database. I have an Item table in my database. I created a bean class which can keep all item data with it and. Then I loaded each Item data in to its object and fill a Jcombobox. Now I want to search with Item name and get all Item data when selecting that item. I have overidden the toString method to Item name in that class. Is there any way to search my Item objects inside a jcombobox?
View Replies View RelatedI have two classes - One is Read.java and the other is Display.java
Read.java looks like this
public static void main(String[]args){
File file = new File("test.txt");
try{
FileReader fr = new FileReader(file);
BufferedReader br = new BufferedReader(fr);
[Code] ....
Display.java looks like this:
public class Display extends JFrame {
private JComboBox comboBox;
private JPanel contentPane;
/**
* Launch the application.
*/
public static void main(String[] args) {
//method call to access other class
[Code] ....
Instead of having it so it displays the id's to the console,is there a way I can set it straight up to the combo box?
My question is related to combo boxes. A combo box in general is a text field with a dropdown list. I would want to know if we can replace hthe dropdown List by an other component, for example a JTable component.
View Replies View RelatedI need to implement an editable JComboBox. It should display a list of rivers from a database. However since the number of rivers is very large, the entries must be dynamically filled after the user has typed in three or more letters.
I have tried to solve this using a KeyAdapter. Everythings works. However after the user has typed in three characters, these three characters are selected in the Combobox. Of course when the user continues to type these chars will be replaced. I have so far not found a solution to deselect the characters and place the cursor at the end.
this.fliessgewaesserComboBox = new JComboBox<UisFliessgewaesser>();
this.fliessgewaesserComboBox.setEditable(true);
this.add(this.fliessgewaesserComboBox, c);
FliessgewaesserSuchenKeyAdapter fliessgewaesserSuchenKeyAdapter = new FliessgewaesserSuchenKeyAdapter(this);
this.fliessgewaesserComboBox.getEditor().getEditorComponent().addKeyListener(fliessgewaesserSuchenKeyAdapter);
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