how can I provide a lock to a CSV file while creating the CSV file using java application and how to restrict the user to open CSV file manually instead of opening the file using java application(Swings and Hibernate). That means instead of opening the file manually the user has to use java application to open that CSV file.
View RepliesI have a file containing a line that starts with professors name followed by the subject name and the semester when it will be taken.I have to Implement Stack to provide input in the file , read the file and then it will ask for a user input of Professor Name and the Semester. The program will determine the subjects taken by the professor and if there is Classes of the same professor in the user provided Semester.
I only know how to read line by line in a text file and not a single string in a file that then will determine the subject taken by that professor and that semester.
here is the text file
Harry Williams | Advanced DBMS | 4
James H. | Computer Networks | 3
Sasha Ben | Artificial Intelligence | 2
Harry Williams | Software Engineering | 3
Palbo Kastro | Formal Languages | 1
Alex W | Advanced SE | 1
James H | Operating System | 3
here is the code I have so far
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
public class Schedule{
public static void main(String[] args) {
try {
File file = new File("Professor.txt");
FileReader fileReader = new FileReader(file);
[code]....
Is there a way to make a exe file, with all dependencies included so it is possible to run the application on any computers without installing any other programs?
View Replies View RelatedI've written a java application with several classes all in the same .java file. It works just fine. Now, I've broken it up so that each class has its own .java file. Still works fine. My next step is to put those classes into a package, but I'm not about to get the program to run.The .java source files are all in /home/user/src
I've set the CLASSPATH to /home/user/src..All of the source files have "package com.myfirm.program" on the first line.I compiled the application with:
javac -d . File1.java File2.java File3.java (etc...)
the compiler created the directory: /home/user/src/com/myfirm/program and put all of the .class files in there.So how do I get the program to run? if I run from /home/usr/src
java File1
I get: Exception in thread "main" java.lang.NoClassDefFoundError: File1 (wrong name: com/myfirm/program/Program)
I wanna make a simple Java SE application which is only one jar file, but unfortunately there is an image which I want my app access it, what I have in mind is carrying that file with the app, but I don't know how to do it and how to access it in run-time.
View Replies View RelatedHow to upload file to google drive using java. my java code is.
HttpTransport httpTransport = new NetHttpTransport();
JsonFactory jsonFactory = new JacksonFactory();
GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(
httpTransport, jsonFactory, CLIENT_ID, CLIENT_SECRET, Arrays.asList(DriveScopes.DRIVE))
.setAccessType("online")
.setApprovalPrompt("auto").build();
[Code] ....
So in that file object(java.io.File fileContent = new java.io.File("document.txt");) asking complete file path. But in file upload we can get only file name not path.
I have style sheet file (e.g. myStyle.xslt). I am trying to decide where to put this file in my web application so that both src and test can access it. All my source in packages inside /src folder and test code in packages inside /test folder.
View Replies View Relatedconvert or move standalone java thread application into Tomcat server container for accessing its JNDI services? Also is it possible to schedule this thread application in Tomcat server? is it possible to keep this app in tomcat as web application and schedule in window's scheduler.
View Replies View RelatedMy code is long so I will try to explain this. I have a GUI application which gets two dates from a user via multiple combo boxes (month/day/year for each, so 6 total). The assembly and processing of these dates (including the days changing based on the month) is correct.
That said, however, when interacting with the program and changing the dates back-and-fourth on the frame, the 'days' combo boxes occasionally lock to one another. For instance, if you select 5 in one, 5 mimics in the other and this cannot be undone.
These are the last relevant bits I believe before the 'SUBMIT' button is clicked and it is all processed.
Controller ... (same set-up for the departure date)
Java Code:
// MONTH COMBO BOX LISTENER -- ARRIVAL
class ArriveCBListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
// Arrive Dates
[Code] .....
ConcurrentHashMap can be used in Readwrite Lock..
View Replies View RelatedI'm suppose to read the following code and devise a program that can break the lock.
public class InsecurePasswordLock {
private char[] secret;
private boolean unlocked;
public InsecurePasswordLock() {
// secrets are usually 30 to 50 upper case characters long
// but here's a hard coded example one
secret = "ASECRETTHATYOUWILLNOTGUESSTODAY".toCharArray();
[Code]....
So, I believe that I can try various password lengths until I get a return from open that !=-1. But I'm not sure how to implement this. This is what I have so far to get the length:
public char[] breakLock(InsecurePasswordLock lock) {
int checkCount=1;
int length=0;
while(checkCount!=-1){
for(int i=0;i<=25;i++){
char[] key = new char[i];
if(InsecurePasswordLock.open(key)!=-1){ // I get a fault at this line for calling a static method
length=i;
checkCount=-1;
}
}
}
I get the error:
Cannot make a static reference to the non-static method open(char[]) from the type InsecurePasswordLock..
How can I keep querying the open method to get my length??
I want to know what is the best way for server side validation in servlets with JSP.
View Replies View RelatedWhich methods can be used to lock keyboard and mouse inputs using java??
View Replies View RelatedI wrote a code to download a zip file in jsp, but it is not working as expected, when i execute this following program i am able to download file with "download_all.jsp" name, but now original download file (/tmp/Download_All/1244687508907.Zip). The download_all.jsp is my jsp name which is having the following code. Here is the code snippet:
try {
String filename = "/tmp/Download_All/1244687508907.Zip";
if(request.getParameter("filepath")!=null){
filename=request.getParameter("filepath");
}
// set the http content type to "APPLICATION/OCTET-STREAM
response.setContentType("APPLICATION/OCTET-STREAM");
[code]....
For a class assignment I have to write a JSP program that will get the name and gender from a simple HTML form and then provide feedback to the user such as "Enter your name" if they leave that field blank. The HTML form has a textField for the name and two radio buttons for male and female, plus a submit button. We covered JSPs only briefly so along with being a Java newbie, JSPs are pretty foreign. I had written the same program as a servlet so I attempted using the similar code for the JSP. I'm using switch to get the gender from the radio buttons but that doesn't seem to work as I keep getting the response "Please select your gender".
My JSP code:
<%@ 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">
<%@ page import="java.util.ArrayList" language="java"%>
[Code] ....
I need to use a counter to keep track of user's input. In this class I am trying to create a combination lock that takes three strings. In the tester class the user inserts three strings and both are compared to see if users input matches correct combination. I have no errors only problem is the setPosition method. My output is always false.
public class CombinationLock {
private String first;
private String second;
private String third;
private String firstGuess;
private String secondGuess;
private String thirdGuess;
private boolean open;
private int counter;
[code]....
Part of my app is to provide an interface to an operator to manage multiple printers of smart cards.
A JSP page displays all printers and each printer has a print button.
I want the operator to press several buttons and each button pressed starts a thread.
Threads should run in parallel and pressing a button does not cancel the processing of the previous button.
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
public class tree_lock_test{
int total_instances;
int thread_instances = 0;
int N;
[Code] .....
this is compiled with another Peterson class which has implemeted peterson lock for two threads ...
I want to write an application which stores files inside of itself, like a Zip file, but it will not be a zip or have the zip compression class.
View Replies View RelatedI have tried running the java application without adding the site to site list in java security tab. But I get a sand box message as APPLICATION BLOCKED BY SECURITY SETTINGS. How to run the java application without adding the site to site list in java security tab.
View Replies View RelatedI already used properties file without problems for localizing information. In that case the property file was stored as a resource in a package; and I used the Class ResourceBundle to manage the operations and the ClassLoader to access to the file.
Actually I need to use property files “To save the configuration of the application”.In this case I need also to update information stored inside the file.property, and I used the same procedure as before to manage it (ClassLoader to get data- also for writing).
I had problems in this case: that the data was never modified inside the properties file. I investigate, and now I think that the problem comes from writing in the property file that is located in the .jar file. For what I know, it is impossible to change resources putted in the .jar files.
I found a solution: to store the properties files out the jar files; and in this way all is good. But it would be more comfortable to store inside.
My question is : if a file property used to “save the configuration of the application “ have to be put out of jar, or is there another way ??
I'm new to programming and java and I'm trying to understand how exactly this piece of code works and what exactly does. I'm trying to make my first GUI application and to read some person details from a file and then put the result in a Jlist.
private static final String SEPARATOR = ",";
public static ArrayList<Speaker> getAllMembers() {
ArrayList<Member> members = new ArrayList<Member>();
try {
File file = new File(Resources.MEMBERS_TXT);
Scanner fileReader = new Scanner(file, "utf-8");
String[] properties;
[Code] ....
I am working with DLLs in java.
A while ago, I developed an application in VB.net, and I'm trying to "convert" this application to Java. But this VB.net application uses some specific DLLs and I need to use them in my Java application. However, my knowledge in this respect are quite limited in manupulate DLLs on Java.
Up to this point, I can already load the DLL. I've read some documentation on how to use functions that are in the DLL; but I have some doubts. For example, how can I translate this piece of code to Java?
Java Code:
API = New MyDLL.Base
With API
.para1= "1"
.para2= 2
.para3= True
.para4= False
[Code] ....
I am currently faced with a task of creating a web application. This application is meant to be accessed by an admin and also a customer. On the customer side the app should prompt the user to fill in an application for of sort and also allow the user to upload a CV to a database. The information entered by the customer will also be saved on the database. The admin should have the ability to look through all the candidates and their information and CV`s. He should also be allowed to search for candidates with specific key words...I am not a professional programmer but know the core of Java programming. I have a tiny bit of knowledge of MySql.
View Replies View RelatedI am working on a Java Web Server application.In which server needs to send message to a Mobile no?
What are the way to send message to a mobile no by Java application.
by reading online threads i found like
[URL]
which one I should use and any other approach other than these to send a message using java application?
So say I write up a program like a dice roll game, which I see on the forums here. It's all written and good to go and when I hit Run it does what I want it to do, no errors..What do I do with those .class and .java files? Do I compile it somehow into an app I can put on the google play store? What is the NEXT STEP after the program is all written?
View Replies View Related