I'm trying to modify an existing code and I'm having trouble with it. I want to add two things to a java Sudoku menu. I added JMenu 5 and JMenu 6 but now I have to make them work. When the user clicks on "Aide" and then "Reglements", I need to have an image that pops and that disappear when the user clicks on it.
I am having issue with jmenu popup in netbeans. It only sometimes works. Sometimes I don't get a java popup at all. Sometimes my File and Edit options are completely missing. This is what my code looks like.
import javax.swing.*; public class menu { /** * @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here JFrame f = new JFrame(); f.setVisible(true);
My professor like us to make a salary, taxes and etc exercise. which we should type the name first then, input salary. then if we input the amount 8000 or higher. the system will ask another question about the marital status. and that is it.
My real problem is when we input 5000-7999 the system should ask a different question, stating do you want to pay for your premiums and a follow up of yes and no choices. if we input 0-4999 the system will just state that it is your current salary.... etc..
package exer5; import java.util.Scanner; public class Exer5 { public static void main(String[] args) { Scanner Kirk = new Scanner (System.in);
I have two dialogues: one name "dialog" and another named "queryDialog". Each dialog has one button among other things and they are supposed to make their respective dialogues hide when clicked. But the second button doesn't work.Here is my code:
I tried to follow the example of How to add multiple ActionListeners for multiple buttons in Java Swing - Stack Overflow but there seems to be a problem.
I have spent quite a few hours trying to follow an API on how to use Actions in a java program.
I have 3 JButtons and have just added a JMenu. What I want to do is to add an ACTION so that the JMenu performs the same function as the JButtons. (i.e. they both do the same thing).
I have tried to copy and follow the example from the API forum.
How to Use Actions (The Java > Tutorials > Creating a GUI With JFC/Swing > Using Other Swing Features)
The first error I get in compiling is on the following line:
Action loadFile = new LOADFILE();
However, I get the following error message:
softeng2final2.java:49: cannot find symbol symbol : class LOADFILE location: class softeng2final2 Action loadFile = new LOADFILE();
How to get my program to display a piece of text (upside down) on the first button press, and then display it right-side up on the second button press. I've looked all over the internet and I can't seem to find a example that fits my situation.
Here is the code:
package org.CIS407.Lab10; import javax.swing.*; import java.awt.*; import java.awt.event.*; public class JUpsideDown extends JFrame implements ActionListener
I have read that when two threads have two steps (of execution) and each step involves many operations, then the operations of both the threads kind of overlap one-another. For example
I think I am not very clear about interleaving actions/operations? Especially when we say that atomic actions can not be interleaved. But
Java Code:
class Counter{ private int c=0; void increment () { c++; } void readIn () {
[Code] ....
And the following sequence of events occurs.
Thread A: Retrieve cThread A: Increment cThread A: Store the result in cThread B: Ask the user to enter a valueThread B: Read in the value, store it in c
Now the value of c obtained after increment will be lost (Thread Interference). Isn't this an example of interleaving operations?
I was tasked to do a 2-4 player network card game. Before I jumped into doing the card game. I decided to try out an a simple program which is the clients taking turns to type in their textfield.
I have a server that listens to 3 incoming client connections. once all 3 clients is being connected,
Steps
1) The first client will send the message first while the second and third client will wait for the first client to finish sending.
2) After the first client finished sending the message, it will be second client turn to send the message and the third client will wait for the second client to send finish.
3) After the third client finished sending the message, it will be third client turn to send the message and the first client will wait for the third client to send finish and (go back to step 1))
**The first client can only start typing once all 3 clients is being connected**
In my server class,I spawn a new Thread once a client is connected, I do a wait() on each time the client is being connected, I stored the thread in a arraylist as well. I have an id to keep track how many clients is currently connected. once the id reaches 3, I used notifyall() to notify all the threads and set the first position of my arraylist as my currentThread so that I can keep track which is the currentThread running.
I started 3 clients. and I typed the textfield of the first client but my server isn't receiving any messages.
class Server implements Runnable { private List<SpawnNewThread> sntList = new ArrayList<SpawnNewThread>(); private SpawnNewThread currentThread; private int id = 0;
- The Instance Text box and SAVE button should be disabled. When the pop up appears. - The Instance Text BOX gets enabled only when any selection happenes in COMBO Box - The SAVE button gets enabled only when COMBO BOX and INSTANCE TEXT BOX is filled. - Let the CANCEL button be enabled always.
I'd like to change the text on the two buttons which I have in my Dialog Box, how should I do this?
Also, when I click the X Button in the top right of the Dialog Box, nothing happens, and the program only stops when I end it in jGrasp. How do I make this button close the program when clicked on?
import javax.swing.*; import java.util.Random; public class SwingInputExample { public static void main(String args[]) {
I need to design 'notepad' application as my assignment.
Requirement: Only text is allowed, all the characters are having same size and font. It should have feature like new, open, save , save as , exit , UNDO , find , replace and font.
For this i use JTextArea and menu bar .
I am able to develop features like new, open, save , save as , exit. Need to implement now UNDO , find , replace and font but struck at 'UNDO'.
UNDO feature should be enable only when user writing in the writing area but not when it opens any file. What i thought is to have a flag on whenever user save whatever he wrote and if he use select UNDO then it check for the flag. If flag is ON then it will not do UNDO and if flag is not set then it cleared everything from the Text Area.
I would like to implement a variable in a class that is used in another class, how can I do that?
I have a Mall class and a Customer class I would like to associate the position of the customer that is in the Mall class and also implement the same in the Customer class.
Here is a small part of the code without all the methods.
//the two objects Mall m = new Mall("RandomMall",50,30); Customer c1= new Customer("Jack",1240); //the first part of the mall class without the methods class Mall{ private String name; private int width,length; String[][]grid = new String[width][length];
I want to implement a kind of "container" in which to store objects (instances) of different types. Then with an iterator I'd call common methods. This is what I have in mind:
Where translate(x, y, z) is a method common for objects in Positionables which objects are of different types (Sphere, Box etc.).
Now I was thinking Positionables could be a List<Positionable> and Positionable is an abstract class and Sphere and Box extends from it. But I don't know how to propagate the call of translate() to the subclasses.
What are the best approaches for this matter? It would be perfect if I could make it so I could somehow use the "with" construction like in the example above.
I'm writing a simple queue program using a netbeans as a GUI program I've used netbeans GUI editor to create the GUI my main problem was I've written the queuing code to a button function it works but it runs only once and the queue becomes empty on the second run. So I implemented a class which will create the queue outside the button click event but when I do that I get a Symbol not found: method error . The place where I get the error:
I need to implement the attached interface ("Locality"). In the attached UML diagram it has a 1 on 1 relationship with the class "Team". I don't know if this can be somehow implemented in Java. Can I create the attribute "team" in the Locality interface and let it be used by the "Town" and "City" classes? Could it be better to implement it as an abstract class instead?
I am a beginner at Java programming. how to implement my own String class, but I have to provide my own implementation for the following methods:
public MyString1(char[ ] chars) public char charAt(int index) public int length( ) ublic MyString1 substring(int begin, int end) public MyString1 toLowerCase( )
[code]....
I have looked through the API, but I don't really understand where to start.
I have a JSF app and for some reasons i need to refresh the page on browser back button.I tried implementing the solution given in Force JSF to refresh page / view / form when back button is pressed ,the only difference is that my app runs with servlet version 2.5 so i did the mapping in web.xml as below
Ive been trying to implement the Filewriter to my code. What I want is to have the textfield data written to a text field. Im thinking you have to specify the text field you want to have in the filewriter statement,I've done something like this, Ive used the try catch block.
if (source == jBPay) { System.out.println("Pay"); { double dOrderTotal = dTotal*1.2; jTTotal.setText(Double.toString(dOrderTotal)); jTTotal.setHorizontalAlignment(JTextField.CENTER); // align text field centre jTotal.setText(String.format("%.2f", dTotal)); // set pay text field to 2 decimal place
[code]...
What I want is to have the textfield data written to a text file*Hi all, Ive been trying to implement the Filewriter to my code but I cant figure out what im doing wrong.What I want is to have the file data written to a text field. Im thinking you have to specify the text field you want to have in the filewriter statement.
>>> Student s = new Student("Roll No", "Name"); >>> System.out.println(s);
Then it gives output according to the way that toString() of Student is implemented,right ? What if I wanna do the same for arrays?? I mean to ask, let us say I have array int[] arr = { 1, 2, 3, 4, 5}. When I say System.out.println(arr), it should give the output as it gives for collections [1,2,3,4,5].
I know that Arrays.toString(int[]) can work for us in this regard. But my question is that can we write our own toString() method so that when I print the "arr" (an Object itself) it should call the toString() that we implemented like a callback function.
