I am trying to save a state of a big GUI Swing app. I am trying to save the containers (ArrayLists and JPanels too ). But I am recieving an exceptions:
Java Code:
ilian.Quiz.MainApp$5
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1183)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1547)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1508)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1431)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1177)
at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1377)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1173)
at java.io.ObjectOutputStream.access$300(ObjectOutputStream.java:162)
[code]...
What is causing it? I guess anonymous classes like new Thread(new Runnable(...) will cause errors.
I am studying Serialization from the SCJP 6 Kathy Sierra book. I came across this code snippet.
public class Cat implements Serializable { public static void main(String[] args) { Cat c = new Cat(); try { FileOutputStream fs = new FileOutputStream("testSer.ser"); ObjectOutputStream os = new ObjectOutputStream(fs); os.writeObject(c);
[code]....
The output is as follows.
files.Cat@4d43691d files.Cat@7f39ebdb
1) Why are the two hashcodes different?
2) Serialization is supposed to make and identical copy of any object and all its instance variables. So, if the hashcodes are different, are these objects located in different locations in heap?
I'm building GUI and whole app is going to read and rewirte on xml file..
First I make function for read and write and they are working, but now I decide to make one class where I'm going to have get and set.. This is my class wehre I need to read everything from xm class CurrentData {
Now my idea is when I start app that everything from xml is going to read from xml and trough get is going to show on my interface, when I edit I'm going to save and with function create I'm going to make same xml file with different parameters... how to use serialization...
I am programming a project where i am supposed to make addition, subtraction, division and multiplication which i can do. I need making a GUI with pictures and thumbnails of other pictures below.
I desired to produce a GUI in Java swing which should be look like mobile phone, as rendered under. test.jpg...So now the user should press the buttons and he can see the operation on the given phone screen, like if user press button "1" then it should display on the screen.
public class SimulatorPanel extends JPanel { public static BufferedImage image; public SimulatorPanel () { super(); try
[code]....
Basically, I wanted to develop a mobile simulator, but I having problem with GUI only. Or any open source simulator in Java?
I'm just starting to learn Java GUI. I'm trying to make a simple GUI that will update dynamically but having trouble ending the loop correctly.The Currently I've got the GUI updating and stopping, but the Test class method loop does not terminate correctly, it continues to count.
import java.awt.*; // Using AWT container and component classes import java.awt.event.*; // Using AWT event classes and listener interfaces import java.util.Timer; import java.util.TimerTask;
I am trying to get my MouseListener to change the foreground and background on hovering over and once the menu is clicked, unfortunately only mouseEntered & mouseExit works but once I click on the menu I loose the selected colours so I am trying to use mousePressed but it does not have any affect.
mnuFile.addMouseListener(new MouseAdapter() { public void mouseEntered(MouseEvent evt) { mnuFile.setForeground(Properties.ORANGE); mnuFile.setBackground(Properties.BLACK); } public void mouseExited(MouseEvent evt) { mnuFile.setForeground(Properties.WHITE); mnuFile.setBackground(Properties.BLACK);
I have a GUI with several buttons and I'm using NetBeans GUI Builder to do. At the click of one of these I would like for it to open another frame containing a picture. So I associate a listener (actionPerformed) the button and when clicked it opens actually post the new frame.
In the new frame I waxed a JLabel and then I associate the image of the label. I saw that to do that NetBeans generates this code:
My problem is that the picture is overwritten several times during the execution of the program is not changed yet in the frame. That is, in the new frame is always displayed an old version of the image.
I have an image that is created every time I click on the button (it always has the same name and same path). Basically I have a generic tree on which I perform the operations (add, remove, etc..). When I click on the button I call a method that generates the image of the tree (using Graphviz). So I have one image that changes over the time...
How can I do so that the image is always up to date?
The Code:
package View; import javax.swing.Icon; import javax.swing.ImageIcon; import javax.swing.JLabel; public class AlberoIpotesi extends javax.swing.JFrame {
I am trying to send a JPanel object to the server. While doing so I get the error -
java.io.NotSerializableException: javax.swing.filechooser.WindowsFileSystemView at java.io.ObjectOutputStream.writeObject0(Unknown Source) at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source) at java.io.ObjectOutputStream.writeSerialData(Unknown Source) at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
I would like a small box to be able to enter a contacts information and I started with building it thru netbeans. Now I am thinking I should start from scratch so I understand everything. What should I do? I am having trouble making the buttons at the bottom work. All I would like to be able to do is setFrameVisible(false); but I can't seem to be able to do that without loosing the whole project not just the frame I am working on.
The buttons I am referencing are the Cancel & Accept
public class pa4GUI extends javax.swing.JFrame { String ph; String ln; String fn; String em; String or;
I am a beginner with Java. I have never used SWING before but I have to use it now and I am clueless. I don't know if what I am doing is right.I need to create a simple calculator. My problem is getting the buttons the user clicks to appear in a text field. I know I haven't added the =/*- buttons yet.
I have left actionPerformed practically blank, what to put in ?
import javax.swing.*; import java.awt.*; import java.awt.event.*; /** * Created by IntelliJ IDEA. * Date: 11/12/2014 * Changing Face Program. */ public class Calc extends JFrame implements ActionListener
I'm trying to implement CSS in Java via a JEditorPane and an HTMLEditorKit. The CSS is included below. It *should* create a container with one on the left, small, and one on the right, large. It works flawlessly on JSFiddle [URL] ...., but on Java, it won't put the two divs next to each other. Is this a problem in Java/Netbeans or is it my problem? It creates the divs, but beneath each other. The JEditorPane is wide enough for all of them to fit.
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 was using jdic api for the embedded browser in my java swing application but its not working good anymore so i want to use a better reliable and of course free api ..
i have problem with the following two java classes, driver class Reservations and Room class. When i run, it just show blank frame, tell me where i gone wrong.
import javax.swing.JOptionPane; import java.awt.*; import java.awt.event.*; public class Reservations extends Frame implements ActionListener { Color lightRed=new Color(255,90,90); Color lightGreen=new Color(140,215,40); Rooms room=new Rooms(5,3);
So i'm using Netbeans and have created this template for the program i want to create. Basically what I want to do is enter a time and date in 24hr format including seconds and the date of start and end time and have the program calculate the time difference between Tool launch and tool Receive that takes into factor the Launch and Receive Dates for a total of hh:mm:ss duration. I don't know how to combine both those factors output one number in a total number of hours Duration. I'm also having problems linking the ODO (odometer) which the formula would basically be time/ODO (or distance in feet) = x.x ft/sec format.
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates and open the template in the editor. */
public class NewJFrame extends javax.swing.JFrame { /** * Creates new form NewJFrame */ public NewJFrame() { initComponents();
I have a problem with slider which i want to create jlabels in a panel by sliding the slider and get the value but the jlabel doesn't show in jpanel. Below is the code :
JPanel PanelBoxes; JPanel panel; JLabel c; public static void main(String[] args){ DividePanel div = new DividePanel(); div.go();
