Servlets :: Detect Keystroke In JSP Textarea And Keylistener

May 22, 2014

i can use this current code to change it so that it use TextArea in jsp and the keylistener code in servlet. i know i have to take out the JFrame,JTextfield and ContentPane but still i could not do it.

Servlet:

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.io.IOException;

[code]....

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Servlets :: Capture Keystroke From User In Textarea And Insert Details Into Text File Using Java

May 6, 2014

i am trying to do a program captures keystroke and mouseclick from user in a textarea and insert the details intoa text file using java. Mainly such as delay between keys, no. of times backspace being pressed, alt tab press and copy paste mouse click.

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Servlets :: How To Redirect A Console Output To Textarea

May 8, 2014

i am doing a program that allow user to run and execute java language in this commandline.jsp, a servlet execute.java , jsp called get consoleout put.jsp to direct it to commandline.jsp...however there a compilation errors cos i could only get a line of string, and when i run loop in commandline.jsp it will not have the output. i could only run helloworld in it.therefore i need code that i can run multiple line in it. i suspect its the print stream error in execute.java

<!DOCTYPE html>
<html>
<head>
<title>java interpreter</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
<script src="jquery-linedtextarea.js"></script>
<link href="jquery-linedtextarea.css" type="text/css" rel="stylesheet" />

[code]....

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JSP :: How To Set Value Into Textarea With EL

Mar 27, 2014

<textarea rows="5" name="name" value="<c:out value="${n.name} "/>" maxlength="100">

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JSP :: Trying To Use Textarea

May 19, 2014

for now my jsp file is something like this again i am trying to use textarea in jsp.

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<form name="Keyboard" action="/CTSystem/Detect" method="get">
<textarea id="Optextarea" name="Optextarea" style="width: 383px; height: 400px; ">

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How To Add A KeyListener

Oct 30, 2014

I'm trying to add a KeyListener, but every time i do i have to implement methods that i will not use.

import javax.swing.*;
import java.awt.*;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
public class GameFrame extends JFrame implements KeyListener{
private GamePanel panel;
*/
public GameFrame()

[code]....

it works just concerned about the unimplemented methods.I'm supposed to make a row of images all the way across the screeen and down it unless the row contains the player. which is always at the bottom.

private void drawRow(int y, int blockWidth, int blockHeight, GameRow row, Graphics g) {
Image img = Toolkit.getDefaultToolkit().getImage("blocks.png");
for(int i = rows.size()-1; i >= 0; i--) {
if(rows.get(i).isEmpty()) {
g.drawImage(img, width,y,blockWidth, blockHeight, null);
}
}
}

As of right now it will only paste on the FIRST column not the rows.

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KeyListener Is Not Working?

May 31, 2014

I'm programming a game, but the keyListener doesn't work. Here is the source code:

import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
 public class InputHandler implements KeyListener{
 public InputHandler(Game game) {
game.addKeyListener(this);

[code]....

My Question is: Why will it not say "up", if I press "w"?

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Keylistener In A Loop?

Jun 16, 2014

I am trying to program a version of the "Worlds Hardest Game" using ready to program and applets for a final class project. Unfortunately I cannot figure out how to get my keylistener to work because I am using a loop for the enemies to go back and forth.

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
 public class HardestGame extends Applet
implements KeyListener, MouseListener {
final int WIDTH = 400;
final int HEIGHT = 123;
int myX = 400;
int myY = 400;

[code]...

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Another Way To Add Keylistener To JComponent?

Jan 13, 2014

I wrote this program that makes a little square move around with the wasd keys. A huge problem that I had while creating it is adding the keylistener to my JFrame. In the end, I ended up creating an anonymous KeyListener class and adding that anonymous class to the JFrame. However, this anonymous class requires two other methods that I don't use, so any other thing I could have done to add these keylisteners to the JFrame without creating an anonymous class? I had to create 4...

Java Code:

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

[Code] .....

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Add KeyListener To Thread

Feb 13, 2014

I want to try and run a thread that starts running on start and quits after pressing a key.I cant seem to detect keypresses. ci cant seem to add code: Post denied. New posts are limited by number of URLs it may contain and checked if it doesn't contain forbidden words.

its just a code snippit without links or anything..this is a small part... but how do i add a keyListener in here that listends to a random key?The class implements KeyListener and the overrided method "keyPressed" sets the isRunning boolean to false... but the keyPressed method is never executed.

public static void main(String[] args) {
Thread thread = new Thread() {
public void run() {
while(isRunning){
System.out.println("running");
try {
sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
};
thread.start();
}

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How To Detect When Program Is Ending

Feb 24, 2014

I have java program that I am debugging with NetBeans. In it I open a serial com port. It seems that if I exit the program the serial port is not closed so I cannot get the port the next time I start the program.

Is there a way I can detect that either the user clicked the "X" in the upper ight of the GUI or I clicked the "Stop Button" in NetBeans?

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How To Access Keylistener If It Is Within A Method

Feb 1, 2014

I am trying to make a program where a ball moves up continuously when you press space, then begins to move down when you reach a certain point. My method for this is to have a timer, and have a method that does this: When you press space, add 10 y coords every second (using a timer), and if you reach 470 y, then begin to drop 10 y coords. I made a method to hold the keylistener, and am running that method inside the actionPerformed method which is within another class. However, since it is a method, I cannot add my keylistener to my frame in the main method.

main
error line 9
Java Code: import javax.swing.*;
public class Main {

[code]...

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Accessing Keylistener From Thread

Mar 23, 2014

I start my thread, it's for a real basic game I'm learning. Everything was working fine, until I got to recognizing keys. It runs, and I can close using the mouse on the close command, but the keys aren't being generated from the keyboard. I copied it to a working sample, and here are the two files.

package testkeys;
import java.awt.Canvas;
import java.awt.Dimension;
import java.awt.image.BufferedImage;
import java.awt.image.DataBufferInt;
import javax.swing.JFrame;

[Code] ....

The idea was to set the return value to true if any key is pressed, thus quitting, for this short sample program. Problem, it never recognizes any keys pressed on the keyboard. New to java and threading.

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Combining JMenuItem And KeyListener

Jun 9, 2014

I have a JMenuItem "Find" in the Edit Menu. I want to add a shortcut key to the JMenuItem.

For Find for example i want to use Ctrl + F

Here is my 'Action' for 'Find' which can be used via Edit->Find. It works.

Find = new AbstractAction(){
public void actionPerformed(ActionEvent e){ 
String word = JOptionPane.showInputDialog(new MainWindow(),"","Find",PLAIN_MESSAGE);
new WordSearcher(textArea,word);
}
};

WordSearcher() is a class i am using to search the word

Now i want to add a KeyListener for ctrl+F, for doing the same purpose. Even this one works.

private KeyListener k1 = new KeyAdapter()
{
public void keyPressed(KeyEvent e)
{
if(e.isControlDown())

if(e.getKeyCode()== KeyEvent.VK_F)

[Code] ....

But the problem here is i have to write the same code twice. Is there some way by which I can Use the already written Action Find in the KeyListener.

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Write TextArea To File Formatting?

Dec 10, 2014

I want to write a text area to a file which I have accomplished however the formatting for how it is written into the text file is different. Is there a different library I must use to retain the formatting?

I'm using a BufferedWriter to write to the file

if (!file.exists()) {
try {
BufferedWriter output = new BufferedWriter(
new FileWriter(file));
output.write(textArea.getText());
output.close();
} catch (IOExcception io) {
io.printStackTrace();
}
}

If I write this into the text area:

DreamInCode
YouTube
Google

The text file contains text that says:

DreamInCodeYouTubeGoogle

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Program To Detect Number 7 And Its Multiples

Apr 25, 2015

I just started learning Java, I was asked to write a simple program that prints a message if it encounters the number 7 or its multiple.

This should be achievable using simple loops and simple operations...

Here is my attempt:

Java Code:

Scanner scan = new Scanner(System.in);
int i, j, temp;
i = scan.nextInt(); // Awaiting user input
j = scan.nextInt(); // Awaiting user input
if (i > j){ // i = 10 j = 0
temp = i; // temp = 10

[Code]...

Now it works fine for numbers that are less than 70...

Example for output with i = 15, and j = 25:

Java Code:

15
16
!!!
18
19
20
!!!
22
23
24
25 mh_sh_highlight_all('java');

I am not sure what to do in case if for example 'i' and 'j' are very big numbers

I mean, I need it to detect the 7s even if it in the thousands place, actually - no matter how big is the number... So far I only made it to work for numbers that are less than 70...

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Swing/AWT/SWT :: Input Image In Textarea

Jun 4, 2014

I am trying to input an image into a JTextArea using following code . Image is not displaying in the textarea

else if(action=="Image")
{
final ImageIcon imageIcon=new ImageIcon("E:/Anu/sec.gif");
final Image image=imageIcon.getImage();
Image grayImage = GrayFilter.createDisabledImage(image);

MF.TxtMsg=new JTextArea(){ //MailFrame MF

[code]....

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How To Identify Up Down Left And Right Keys With Keylistener

Apr 9, 2014

I Want to identify up, down, left and right keys with the keylistener() WHATE NAME DO I IDENTIFY IT WITH

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Try / Catch Into ActionListener - Detect Characters Other Than Alpha

Dec 8, 2014

I'm trying to place a try/catch into a Actionlistener that will detect other characters other than alpha.

private class printbuttonHandler implements ActionListener {
public void actionPerformed(ActionEvent e) {
//Object src = namesinput;
//String message = "Insert Message Here";
  notesinput.setText("");
JOptionPane.showMessageDialog(null, notesinput, "Receipt",
JOptionPane.PLAIN_MESSAGE);
}

I'm not even sure if I'm trying to place it in the correct area in the code. However I like to perform this prior to the receipt being displayed so if there a issue the user can correct this before the final receipt has been sent .......

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Swing/AWT/SWT :: Append Text To Textarea From Another Class

Aug 2, 2014

Class 1 open main frame

Class2 add panel for main frame

Class3 append text to Jtextarea (of panel class2)

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Getting User Input From TextArea And Storing It As String Value

Jan 20, 2015

I am having trouble with getting a user input once they enter it in to a JTextArea and then storing it in to a string value. See, I wanted the user to enter an answer in to the JTextArea, and then once I store it in to a string value, I would be able to use it later. I wanted to after storing the variable to print it on to a JLabel, but nothing is showing up... Heres my code.

static String usera[]= new String [10];
for (int i=0; i< usera.length; i++) {
//These are the JTextArea names
usera[0]= Question1.getText();
usera[1]= Question2.getText();

[Code].....

I already initialized the JLabels earlier in my code, and I did not feel the need to post all my code here. This is where I am trying to get the string variable and then printing it out.

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Creating Application Which Detect Image And Process It?

Oct 24, 2013

i want to create an application which detect an image which took from camera and to process it so that it can be verified ..for example number plate of the vehicle ..if i need to extract the numbers from the image ..

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Create Application Which Detect Image Taken From Camera

Apr 7, 2015

I am new to java and i want to create an application which detect an image which took from camera and to process it so that it can be verified ..for example number plate of the vehicle ..if i need to extract the numbers from the image ..

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Swing/AWT/SWT :: How To Create Word Space In Textarea

Jun 20, 2014

I am setting text to textarea from textfield. It works perfectly. My challenge, however, is setting texts with spaces in-Between them. For example, what I observe is:Amount23 instead of: Amount 23. Is it possible to automatically create word space while setting texts?

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I/O / Streams :: How To Detect USB Drives And Search For Images

Sep 29, 2014

I am working on a project, how I can detect an usb drive and search and extract images from the drive.

I know there is loads of API out for detecting usb in java application. But, I cannot seems to find out how do you run the API. [URL]...

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Swing/AWT/SWT :: Setting Multiple Values To Textarea

Jun 18, 2014

I am making use of NetBeans IDE 8.0 to build a GUI. The idea is that I set multiple values received from textfields to textarea. This will enable me print the work. But ONLY ONE value from textfields is set(appear on textarea); the others do not appear at all. Below is example of what I mean:

String s = jTextField1.getText();
JTextArea1.setText(s);
String x =
jTextField2.getText();
JTextArea1.setText(x);

Only one is being set. The rest are not.

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