here is the code i already have made;
import java.awt.*;
import javax.swing.*;
public class EX_7_2 extends JFrame
{
public EX_7_2()
{
setLayout(new BorderLayout(5, 10));
[Code] ....
I have buttons created on a frame and then I register the listener from a controller in a controller-view relationship.
When I click the button on the face, the action never executes for some reason. I thought maybe there was a problem registering the listener but I can call the buttons doclick() method and it executes as it should. Perhaps I'm overlooking something really obvious here but I can't see it.
btnEight = new JButton( "8" );
// btnEight.addActionListener( controller );
btnEight.setBounds( 212, 90, 41, 23 );
frame.getContentPane().add( btnEight );
and then I add the listener
public void setController( ActionListener theController ) {
Component[] components = frame.getContentPane().getComponents();
for ( Component component : components ) {
if ( component instanceof JButton ) {
JButton button = ( JButton ) component;
button.addActionListener( theController );
}
}
again, when i click the button nothing happens. but if i add the following code
btnEight.doclick()
the actionPerformed invokes in theController as I intended.
You can see the entire project on GitHub so you can see the full context. The controller class contains the listener and the view class contains the buttons.
Whenever i click start button it will just printout start to the jtextfield it wont start the time .
import java.awt.*;
import java.util.Date;
import javax.swing.*;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.*;
[code]...
I'm using Eclipse with the Window Builder Pro plugin to create a Java program. I noticed that when I had Eclipse create an action listener for a combobox in a Swing GUI it created an AWT listener.
Did I choose the wrong type of listener? I want my code to use the Swing components because I understand that they are more portable.
In my code 0,1,2 work fine an present my prompts an use my listener correctly but for some reason 3-6 is not an I don't know why? Here's my attached code.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class Guess extends JFrame
[Code] ....
I meant 3-5 not 6
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.
Which contains a tabbed pane and in the sub panel it has two sub panels
1. new user
2.list if i click a button in panel ---
one new user --- i need to get call a function which is of other class so that it displays the list in the right panel..
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class Test extends JFrame{
[code]...
I'm not a java developer, i'm a tester. I am currently testing a java swing application and to do that I have to automate how its used. IE I have to write code which will press buttons for me rather than depending on an end user to do this. I have managed to reverse engineer the entire application (hooray for me), however I am struggling to work out how to invoke methods that would typically be kicked off by a user pressing a button. how to I can call actionPerformed(ActionEvent ae) method which sits in the ATMMainPanel class?
I will be calling it from inside another method which is the equivalent of the main() method.
Java Code:
public class ATMMainPanel extends JPanel implements ActionListener {
[declarations here]
//here - User is pressing the Enter button after putting in pin.
public void actionPerformed(ActionEvent ae) {
[code performed when button is pressed]
} mh_sh_highlight_all('java');
I am working on a 3D-Projekt, but that's not the point. I wanted to call a function to turn the camera and want, that the function ist called while the key is pressed. I tried following:
private ActionListener actionListener = new ActionListener() {
public void onAction(String name, boolean pressed, float tpf)
if (name.equals("Camera Left") && pressed) {
setViewAngle(-1);
I think, I have to change the ActionListener "onAction", but I can't remember in which way. In the actual code the programm only once perform the action when the key is pressed.
I already tried :
while(pressed) {setViewAngle(-1)}
But that didn't work, but get the whole programm to halt.
So I thought of key repeating.
I'm writing a program for exemplary reasons that is basically two text fields, one for a username, and one for a password. the way its written is asking testing for what is inputed into the text fields if its equal to a "valid" username and password. if it is, a variable representing that is set equal to 1. there is another if statement asking if the actionevent.getsource is equal to the name of the textfield. the issue I had was that when I ran the program, it seemed to only test for the first condition, so I got the same result from the program regardless of what I input into the text field.
The Code
Main class:
import javax.swing.JFrame;
public class Alpha {
public static void main(String args[]){
log l = new log();
l.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
l.setSize(360, 240);
l.setVisible(true);
[Code] .....
The code originaly was written "eve.getSource() ==" but I changed that to see if it would resolve the issue with no avail. With it written this way, the program does nothing upon entering the text and pressing enter. Currently, there is nothing written to change the variable "val" to 1 to show that the username is valid. I did this because I can't figure out how I would go about doing this.
Need to write two files but getting an expected exception error.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.Scanner;
import java.io.FileWriter;
public class TestingPanel extends JPanel
[Code] ....
TestingPanel.java:49: error: unreported exception IOException; must be caught or declared to be thrown
FileWriter outputFileQuestions = new FileWriter("Test.txt");
^
TestingPanel.java:50: error: unreported exception IOException; must be caught or declared to be thrown
FileWriter outputFileAnswers = new FileWriter("Answers.txt");
[Code] ....
Prompt for the project is "Write a program that will ask the user for a number of seconds and output the equivalent period of time in days, hours, minutes, and seconds.The program should:
-Use modulo division to calculate the number of days, hours, and minutes.
-Use compound operators when making assignments.
-Proper formatting and use of comments
-Symbolic constants defined as the number of seconds in a minute, hour, and day.
For example: final int sec_in_min = 60;"
public class Mod1
{
public static void main (String[] args)
{
int sec, min, hr, day;
final int SEC_IN_MIN = 60;
final int SEC_IN_HR = 60 * 60;
final int SEC_IN_DAY = 60 * 60 * 24;
[code]....
I got to make a java code for my class. I must make a calculator using stacks. I have a code but i got some mistakes. Here is the code
Java Code:
package stackscalc;
import java.util.Scanner;
import java.util.Stack;
import java.util.EmptyStackException;
class Arithmetic {
int length;
Stack stk;
String exp,
[Code] .....
I am trying to make a calculator using Java GUI. I've managed to make an ActionListener and add it to a button, but I've made an error in my code that I'm unsure of how to solve. Because of how I've written the code, only one number can be placed in the text field. For example, the an ActionListener for the three button on the calculator was added to the button, but no matter how many times the user presses the button, only one 3 will appear in the text field. The code is below:
import javax.swing.*;//import the packages needed for gui
import java.awt.*;
import java.awt.event.*;
public class Calculator {
public static void main(String[] args) {
JFrame window = new JFrame("Window");//makes a JFrame
window.setSize(300,350);
[code].....
As you can see, because the compiler forces the String variable to be final, so when the user presses the button, the code simply shows how a space character and three character would look like, because the String variable can't change. How do I write my code so that every time the user presses the button, a character is added to the text field?
i got a problem with this program.I am supposed to make a calculator using stacks but it seems that i m stack. i can t get the right recognition
for () and {} []
its not necessary to use all these symbols.just a simple () will do .here s the program
package stackscalc;
import java.util.Scanner;
import java.util.Stack;
import java.util.EmptyStackException;
class Arithmetic
{
int length;
Stack stk;
String exp,
postfix;
[code]....
I want to make a calculator program as my first ever program and I've been working on the layout and I think I have it close to where I want it but will probably tweak it in the future after I get it to work. My problem is I'm trying to add a MenuBar to it but it is not showing up. I tried having it all over my code but whereever I put it the MenuBar doesn't show up.
public class MySecondCalculator extends JFrame {
JTextArea screen;
JMenuBar mb;
JMenu file;
JMenuItem open;
JButton one, two, three, four, five, six, seven, eight, nine, zero, decimal, add, subtract, multiply, divide, equals;
[code]....
i am working on my assignment in Compro 2, we are ask to make a simple calculator program
here's my code;
import javax.swing.JPanel;
import javax.swing.JButton;
import javax.swing.JFrame;
import java.awt.BorderLayout;
[code]...
I have to make a gpa calculator for 5 courses of grades A B+ C+ D F, and worth 4, 3.5, 3, 2.5, 2,1,0 respectively. using 10 input text boxes, and a button
Create two arrays of length 5: one to hold the numerical values of letter grades, the other to hold the number of credit hours. Initialize both to have 0’s. Write a function that takes a letter grades entered by a user and returns its numerical equivalent.
Use an ‘if…else if… else’ construct.
Write a function that can operate on the two arrays and return the GPA. Use a for loop that runs from 0 to 5, multiplies the corresponding array elements and adds them together, divides that total by the total number of credit hours, and returns that value.
Input elements:
In the first 10 textfields, use the onchange attribute to fill the arrays with user entries.
Hint: For the course grade entries it should look like
onchange= ‘array1[0] =
first_function(this.value)’ etc.
The button should make the value of the last text area equal to the return value of the second function.
i have my whole code completed but when i press the button it returns the points value '0' so i think there is an error in my if else statements (ltonum function)
<DOCTYPE! html>
<html>
<head>
<title> Assignment 9: Javascript 3
</title>
<!-- Assignment 9, Due November 8, 2014, Jamie Zajac, TA Kartik-->
<style>
body
{
background-color: lemonchiffon;
color: midnightblue;
[Code] ....
how to make this restart button work. This is what I have so far. I have put the restart button code in red and bold...
package Game;
public class Buttons extends javax.swing.JPanel {
private GameWorld world;
private int restart;
[code]....
I am trying to make a java Simon game but I cannot figure out how to make the GUI work. I have this so far, but now it just keeps saying I lose and it isn't functioning. It seems the only way I can make it work is having the action listeners in the do loop, but then once a button is clicked, the code errors out.
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Random;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
[code]....
I tried to make a splash screen it didn't work.Here is the error message: Exception in thread "main" java.lang.Error: Unresolved compilation problems:
JSplash cannot be resolved to a type
JSplash cannot be resolved to a type
at com.mime.splashscreen.SplashScreen.main(SplashScre en.java:8)
The code is:
package com.mime.splashscreen;
public class SplashScreen {
private static final String Color = null;
public static void main(String[] args) {
JSplash splash=new JSplash(SplashScreen.class.getResource("splash.png"), true, true, false, "V1",
null, java.awt.Color.RED, java.awt.Color.BLACK);
}
}
I created the following hangman program, but it only works for one word file inputs. How can I modify the program to make it work for files with a multiple word phrase?
/**This program is a basic Hangman game. It takes a word or phrase from a file, and then asks the user to guess the letters in it. The program ends when the user inputs 8 wrong guesses.
*/
import java.util.Scanner;
import java.io.*;
public class hangman{
public static void main (String[] args) throws FileNotFoundException{
Scanner kb = new Scanner(System.in);
String guess;
[Code] ....
This was shown in class the other day and I'm still not sure of how exactly it works, even after looking at it through a debugger.
public void sort(){
for (int i = 0; i < size; i++) {
Node temp1 = head;
Node temp2 = head;
Node temp3 = head;
while(temp2.next!=null){
temp3 = temp2.next;
[Code]...
Again, I didn't write this code I'm just trying to understand it. Why specifically do three different temp values need to be used instead of just one like in most sorts?
It is part of a larger program that can be found below.
import java.util.Random;
public class MyQueue implements IntegerQueue{
class Node{
Node next;
Integer data;
Node(Integer data){
this.data = data;
[Code]....
I have this code: [URL] .... It works on fiddle but on local it does not work. What should be the problem?
Fiddle:
$('#addnewline').on('click', function (e) {
e.preventDefault();
var $textarea = $('#thetext');
$textarea.val(function () {
return $(this).val().substring(0, this.selectionstart) + "<br>" + $(this).val().substring(this.selectionstart);
});
});
<button id="addnewline">New line</button>
<br />
<textarea rows="4" cols="50" id="thetext">Some text
This is my first servlet program. I wanted to try a web application where "register" user module will be in servlet program.I can access my index.jsp but when I enter values and click submit.
I get "There is no Action mapped for namespace [/] and action name [RegisterUserServlet] associated with context path [/TrainingApplication]. - [unknown location]".
Here's my index.jsp file:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
[code]....
I am using apache-tomcat-8.0.14 server.
So what I do normally is draw the bottom layer of grass, and when I draw the second layer with trees, the tree layer has a shadow, that shadow doesn't go ontop of the grass layer, but instead it overwrites the grass layer aswell and I've checked the color codes, the shadow has combined with white, not the first layer.
it's obvious that that's not how alpha works then, how do I do it?