ReadLine Doesn't Work - Cannot Find Symbol
Oct 10, 2014int arabe = Integer.readLine(args[0]);
String romain= "";
The compilator says that it can't find symbol. The arrow is under the "".""
It worked before.
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Search Form Doesn't Work
Feb 18, 2014import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class frmSearch extends JDialog
{
Dimension screen = Toolkit.getDefaultToolkit().getScreenSize();
JPanel jpnlMain = new JPanel();
[Code] ....
JavaCV Drawing Convexhull Doesn't Work
Sep 9, 2014import com.googlecode.javacpp.Loader;
import com.googlecode.javacv.*;
import com.googlecode.javacv.cpp.*;
import com.googlecode.javacv.cpp.opencv_core.CvMemStorage;
import com.googlecode.javacv.cpp.opencv_core.CvPoint;
import com.googlecode.javacv.cpp.opencv_core.CvScalar;
import com.googlecode.javacv.cpp.opencv_core.CvSeq;
import com.googlecode.javacv.cpp.opencv_core.IplImage;
import com.googlecode.javacv.cpp.opencv_highgui.CvCapture;
import com.googlecode.javacv.cpp.opencv_imgproc.CvMoments;
[code]....
Everything works in this except the part where drawing a convexhull and the convexitydefects around an object. Drawing circle around the COG works OK. I tried to draw them with these lines but no luck.
hullSeq = cvConvexHull2(bigContour, hullStorage, CV_COUNTER_CLOCKWISE, 0);
defects = cvConvexityDefects(bigContour, hullSeq, defectsStorage);
cvDrawContours(img1,defects , CvScalar.BLUE, CvScalar.BLUE, 1,0,0);
cvDrawContours(img1,hullSeq , CvScalar.BLUE, CvScalar.BLUE, 1,0,0);
KeyListener Doesn't Work - Button Is Not Displayed
Apr 14, 2015Why the keyTyped function isn't triggered, when i type a key?
Here is my code:
package main;
import java.awt.Component;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.ArrayList;
[Code] .....
I have noticed, that if i call setVisible(true) before i add the button, then it works, but the button is not displayed... How can i achieve that the button is displays AND the KeyListener works?
HTTP KeepAlive Seems Doesn't Work With Java
Jun 10, 2015I have java http client which sends periodically (every 30 sec; this code is run by heartbeat thread in the cycle) heartbeats:
private PostResponse post(String jSessionCookie, final String action, final String data, final int postTimeoutMs) throws IOException, SSYSException
{
final HttpURLConnection httpConn = openHttpUrlConnection(true, postTimeoutMs, jSessionCookie);
final OutputStream os = httpConn.getOutputStream();
try (final PrintWriter wr = new PrintWriter( DefaultProperty.isEnableSocketTraceGW ? new TracerOutputStream(os) : os ))
[Code] .....
On the server side there is Tomcat 8.0.21 + APR connector. Every time this heartbeat is sent I see in the Wireshark and EtherDetect that new TCP connection is opened (SYN-SYNACK packets) and after getting response from Tomcat connection is closed (FIN – FINACK packets). I was expecting that TCP connections will be reused but not closed.
Capture.png 182.0 K
Populating Array Doesn't Work Inside Constructor
Feb 24, 2014Java Code:
import java.io.*;
import java.util.Scanner;
public class asciiFile {
int height;
int width;
Scanner input;
char[][] poop;
public asciiFile(File f) throws FileNotFoundException{ //constructor
[code]...
The constructor is supposed to take an ASCII file, take the numbers in the file, and populate a 2D array with the numbers in the file.
For some reason, the for loop I use to populate the array works outside of the constructor. When I put it in one of the methods, it runs normally. However, when I keep it in the constructor, I get the following error:
Exception in thread "main" java.lang.NullPointerException
at asciiFile.<init>(asciiFile.java:16)
at main.main(main.java:6)
Works In Netbeans / Eclipse But Doesn't Work After Being Compiled By Either
Mar 2, 2014There is a specific function I have added to a program I've been working with for a while which involves retrieving data from a website. Here is that code:
Java Code: public String getWebData(String urlString, String add) throws IOException{
String output = "";
try {
//+s being the token, for example if dictionary.com was being used
add = add.replace(" ", "+s");
urlString = urlString + add;
URL url = new URL(urlString);
InputStream inputStream = url.openStream();
[code]....
Anyway, when I run this program within Netbeans, it works perfectly. I have a backup of the project in eclipse as well, and I've copied all of the code over and tried running the same thing in Eclipse - exactly the same, it works perfectly. The problem is whether I compile the the code in Netbeans or Eclipse, the exported runnable jar for some reason has an issue with this one method. It doesn't crash, and it seems to be doing something, but it is by no means giving me the data from the website like it is supposed to.
Code That Works On Fiddle But Doesn't Work On Local
Oct 9, 2014I 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
JSP :: Searching Data Using NON English Language Words Doesn't Work
Oct 30, 2014Below is my code
<%--
Document : closeAc
--%>
<%@page import="javax.swing.JOptionPane"%>
<%@page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" import="java.sql.*, java.util.Date;"%>
<%
try {
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
[code]....
All I'm trying to do is to search the data from the database and is doesn't show up!
Read XML File And Delete Its Contents - Boolean Doesn't Appear To Work
Oct 17, 2014I'm trying to read a xml file and delete it's contents. I do this by reading the file,writing it to a temp and then overwriting the original with the temp by renaming it
//overwrite original xml file with new file
boolean successful = outputFile.renameTo(inputFile);
System.out.println("success");
It does say the value of the local variable is not used however. I've debugged to ensure it hits the code it always prints out the line after too.It just does not overwrite my original xml file with the temp one.
It's had votes on stack so I thought that would of been reputableStack - overwrite but the second one got voted as a good answer. But still I would like to know if my code can work or not.
Swing/AWT/SWT :: MouseListener Doesn't Work If JList Has Custom CellRenderer
Nov 9, 2014I have a JList<Object> in my code (it actually takes JLabels) called imageList, and I've given it a custom CellRenderer using the following code:
cellRenderer = new DefaultListCellRenderer() {
private static final long serialVersionUID = 1L;
@Override
public Component getListCellRendererComponent(JList<?> list,
Object value, int index, boolean isSelected,
boolean cellHasFocus) {
[Code] .....
However, when I click anywhere on the JList, nothing gets printed to the console, which suggests that the mousePressed() method isn't being invoked. I think it's a problem with the CellRenderer, because I have similar code elsewhere that works, the only difference being I don't use a custom CellRenderer.
Simple If Statement Taking A String Input Doesn't Work
Jun 6, 2014Scanner sc = new Scanner(System.in);
String input = sc.nextLine();
if (input == "next") {
System.out.print("good Job!");
}
else {
System.out.println("Why ?");
}
//If I type in next it prints out "Why ?" instead of "Good Job!" - Why though ?
Servlets :: Setting Httponly Programmatically In Cookies Doesn't Seem To Work
Nov 5, 2014I am using servlet 2.4 I used the ff. code below to set httponly in my application's cookies but it did not work. When I do a javascrip alert (document. cooke) in my page, the session id still shows up.
Cookie [] cookies = request.getCookies();
for(int x=0; x<cookies.length; x++){
Cookie cookie = (Cookie) cookies[x];
String cookieValue = cookie.getValue();
cookie.setValue(cookieValue + "; HttpOnly");
}
I also tried doing this and it wouldn't work too
String sessionid = request.getSession().getId();
response.setHeader("SET-COOKIE", "JSESSIONID=" + sessionid + "; HttpOnly");
by the way I am using an application server with its JAVA EE version = 1.4 and JAVA SE version = 5
Cannot Find Symbol
May 6, 2014Some method say cannot find symbol like :
jtaAnyText.SetText(intString);
Java Code :
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
public class JTextArea extends javax.swing.JFrame {
[Code] ....
Cannot Find Symbol
Apr 12, 2015I am having trouble compiling my simple java program, i keep having this "cannot find symbol"Untitled.jpg but the ODD thing is when i tried to run my code through online java compiler like Ideone.com it compiles perfectly fine. "Check it here".is it because of my jdk? I use the latest jdk 8. and the book I'm following is "Head First Java"..here's my code
class TapeDeck {
boolean canRecord = false;
void playTape() {
System.out.println("tape playing");
}
void recordTape() {
System.out.println("tape recording");
[code]....
Can't Find Symbol In ObjectOutputStream
Nov 28, 2014My assignment is to create an ObjectOutputStream object mapped to a binary output file named "ItemRecord_binary.txt". So far I've created a ItemRecord class with a constructor with getters and setters and a override toString method. It compiled. This ItemRecordReport class does not compile because of a can't find symbol error. Here is the code:
import java.io.*;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.util.Scanner;
public class ItemRecordReport {
private ObjectOutputStream output;
[code]....
Getting Error / Cannot Find Symbol
Jul 23, 2014I have written the below program and while compiling i am getting error. The program and error details goes as follows,
//compute distance of light travels using Java long variable.
class Light {
public static void main(String args[]) {
int lightspeed;
long days;
long seconds;
long distance;
[code]....
I have given the Java file name as 'Light.java'. I have also verified the availability of the java file and compilation path. both are matching. Also, Java file name and class name defined are also same.
Error / Can't Find Symbol
Mar 2, 2015Whenever i try to compile the code, I get " cannot find symbol".
Java Code: public class NinePointOne{
public static void main(String[] args){
Rectangle rec1 = new Rectangle();
}
} mh_sh_highlight_all('java');
Cannot Find Symbol Method
Apr 10, 2014I was given the Java code for a project and I am supposed to build unit tests to test the performance of seven sorting algorithms and I am getting the following error in my Lab1Test file...cannot find symbol: method sorta(int[]) location: class Lab1Test.
Lab1.java
Java Code: package funcollege.comp10062.perflib;
import java.text.DecimalFormat;
import java.util.Arrays;
import java.util.Random;
[code]...
Keep Getting Error Cannot Find Symbol
Jan 22, 2014I keep getting errors, cannot find symbol. Not sure where I am going wrong.
java:139: error: non-static method integerPrompt(String,int,int) cannot be referenced from a static context
int regNumber = integerPrompt("Enter registration number", 100, 5000);
^
Program7.java:145: error: cannot find symbol
theSubject = integerPrompt(SubjectsPrompt, 1, SubjectQty);
^
symbol: variable theSubject
location: class Program7
Java Code:
import java.util.*;
import java.io.*;
import java.util.Scanner;
public class Program7{
public static void main(String args[]){
Student student = new Student();
[Code] .....
Javac Cannot Find Symbol
Mar 18, 2014The following two files are in the same directory.Eclipse is the IDE.fix the javac cannot find symbol buildUserInfos error.
package my.proj;
import my.proj.UserInfo;
public class ConvertUser {
//...
public static UserInfo[] buildUserInfos(WebUserInfo[] webUserInfos){
[code]...
Cannot Find Symbol Errors
Feb 3, 2015I have the following code snipet and I get the following errors
interface expected here
[javac] private class fileFilter implements FileNameExtensionFilter{
[javac] ^
cannot find symbol
[javac] symbol : method fileFilter(java.lang.Object)
[javac] location: class gui.components.StartupDialog
[code]...
Cannot Find Symbol Error
Jun 12, 2014I thought I have been getting this right, but I keep getting stuck on this one error. Here is my code. Why it keeps getting a 'cant find symbol' error?
// import statements
import java.util.Scanner;
// class declaration
public class GradeConverter
{
// main method declaration
public static void main(String[] args)
{
// display a welcome message
[code]....
It is just a simple input a number between 1-100 and it spits out the letter grade.
Swing/AWT/SWT :: Cannot Find Symbol
Oct 20, 2014I have an Input Box in which the user is supposed to enter the answer to a sum, when the answer is equal to the correct answer I want to show a MessageBox that tells them they've got it correct. But when I run the project it crashes saying it 'cannot find symbol',
Heres the code too:
import javax.swing.*;
import java.util.Random;
import java.util.Scanner;
public class SwingInputExample
{
public static void main(String args[])
[code]...
Cannot Find Symbol Error
Sep 18, 2014I'm picking up Java for a class, and having prior C++ knowledge this stuff has been fairly straightforward with the exception of trying to learn the whole IO system in this language.
className.java:line_number: error: cannot find symbol
myList.add(input);
^
I have dealing with this error left and right after picking up this language, and I can never seem to figure out what it's trying to tell me. I've heard people say it's referring misspelled objects or methods, but I've double and triple checked my code and that never seems to be true for me.I'm trying to make a small program which will allow me to play with the LinkedList object so I can gain some familiarity with how they work in Java, and I have this code so far:
import java.io.*;
import java.util.*;
public class playWithLists {
public static void main(String[] args) throws Exception {
//List<String> myList = new LinkedList<String>();
LinkedList myList = new LinkedList();
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String input = "";
[code]....
The compiler is giving me an error at line 16 (specifically: myList.add(input); )
Keep Getting Errors - Cannot Find Symbol
Nov 30, 2014import javax.swing.*;
public class opt
{
public int code[];
public static void main(String[] args)
{
int xxx = 1;
[Code] ....
Where did I did wrong cus I keep getting these errors: What do I need to do to fix the errors?
F:>javac opt.java
opt.java:25: error: cannot find symbol
cd.checkDeclare<zz>;
^
symbol: method checkDeclare<String>
location: variable cd of type code[]
java:32: error: cannot find symbol
[Code] ....
4 errors