Closed Opened Up Input File

Mar 19, 2014

I have opened up an input file using

File input=new File("hello.txt")..

Then I have created a scanner object that reads data from the file.

Scanner read_file=new Scanner (input).

my question is when closing the files why can't I just do input.close() since that is also closing the file?

View Replies


ADVERTISEMENT

How To Specify Location Of Opened Window

May 8, 2014

I am writing a small app to automate some actions on my computer this requires me to open an application and click on a button I am using

Process child0 = Runtime.getRuntime().exec("/home/user/application");

to do this. The problem is every time it opens at a different lcation on the screen so i cannot click on it using the robot class due to x,y coordinates being different every time. with selenium you can use .setlocation(x,y) method but how can this be done for other applications.

View Replies View Related

How To Set First Cell As Selected When Window Is Opened

Feb 4, 2015

I'm working on a spreadsheet like app using JTable and was wondering if I can make the first cell of the table be selected when the window opens. Is there a way to do so?

View Replies View Related

Socket Closed Exception Being Thrown

Feb 10, 2014

I have been working with socket programming. I was trying to develop a two way communication from server to client. The data is being received when sent from server to client but there is a problem when I am sending from client to server.

I am getting an error as "Socket is closed" pointing to the line where I have created a BufferedReader. I have simplified some part of my code to be very specific.

Code attached.

import java.io.*;
import java.net.*;
import java.util.*;
public class Server
{
public static void main(String args[])
{
String id="policeone";
int hashcodeid=0;

[Code] ....

Error::

Receiving string from client: 'java.net.SocketException: Socket is closed
at java.net.Socket.getInputStream(Socket.java:872)
at Server.main(Server.java:51)

View Replies View Related

Adding Another Statement - ResultSet Is Closed

Aug 15, 2014

I'm want to call another statement within the same resultSet. But it gives an error that the result set is closed.

public static void updateAlarmStatus(int status) {
ResultSet rs = null;
database.restartDatabase();
try {
rs = database
.executeQuery("Select alarmId from alarms where alarmDate = '"

[Code] ....

I googled it and came to know that resultSet is automatically closed if we call another statement within in. I've also tried creating the connection again before the second statement but of no use.

View Replies View Related

Create Program That Prompts Input And Creates File With That Input As Name

Jul 14, 2014

So I was going to try to create a program that prompts input and creates a file (That didn't exist before) with that input as name.Then, the program prompts inputs after stating questions such as 1 + 1, then if the user inputs an answer, put "Question # = Correct "or" Wrong.Code SO Far:

Java Code:

import java.io.BufferedReader;
import java.io.File;
import java.io.InputStreamReader;
public class File_Read {
public File_Read() {//File_Read is the Interactive object

[code]....

So that it puts the Correct or Wrong into the file.

View Replies View Related

Networking :: Intermittent Socket Closed Exception

Jun 24, 2014

We have a servlet application running under jboss 7.1.1/java 1.7 that sends http requests to another server. Everything works fine for most of the time, but occasionally (from one to a couple of times a day) we get a “Socket closed” exception.  I’ve been trying to find out what might be causing this but so far I’ve been unsuccessful. By the way, this has been happening while the application was running under older versions of Jboss/Java so the version might not be that relevant.

Here’s an excerpt from the method where this happens:
. . . . .
try
{
HttpURLConnection conn = (HttpURLConnection) urlEndpoint.openConnection();
   conn.setRequestMethod("POST");
   conn.setDoInput(true);
   conn.setDoOutput(true);

[Code] ....

And here’s what the exception looks like:
. . . . . .
java.net.SocketException: socket closed               
at java.net.SocketInputStream.socketRead0(Native Method)
                at java.net.SocketInputStream.read(SocketInputStream.java:150)
                at java.net.SocketInputStream.read(SocketInputStream.java:121)
                at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)

[Code] ....           
 
In my investigation I  came across some posts that were mentioning the sockets pool the http connection is keeping, but I’m not sure whether and how this solve the problem I have.

View Replies View Related

String Literal Is Not Properly Closed By Double Quote

Apr 28, 2014

I am working with java project which is kind of charting room..but the problem is when am writing the query for listing the message in the conversation the error prevail in my eclipse...string literal is not properly closed by double quote...this is my java file

<%
String uname=session.getAttribute("username").toString();
String pword=session.getAttribute("password").toString();
java.util.Date dat=new Date();
int x=1;
try{

[code]....

View Replies View Related

String Literal Is Not Properly Closed By A Double Quote

Jul 11, 2014

string literal is not properly closed by a double quote

View Replies View Related

Existing Connection Was Forcibly Closed By Remote Host Linux

Aug 14, 2014

I have a Linux Server Debian 7 x86_64 Minimal With java version "1.7.0_65" installed..Its an online Game Server wich Players can join just like other Services.Every 10 - 15 minutes all the players get kicked from the server and get this messege: "internal exception: java.io.ioexception: an existing connection was forcibly closed by remote host"

The players can't join the server for 10 seconds and the server console doesn't show anything for 10 seconds.it doesnt show that the players even left! and when the players try to join they get htis messege: "same nick is already playing"

After 10 seconds everything will work and players can join again and server console say that everyone left and joined..But that happens again after 10 minutes and im losing lots of players because of this error.

View Replies View Related

Scanner Closed - Import Via Keyboard Numbers And Calculate Mean And Standard Deviation To Results

Oct 24, 2014

The purpose of this program is to import via keyboard Numbers.txt and calculate the mean and standard deviation to Results.txt.I am able to get the mean calculate but when I open the Results.txt the standard deviation is 0. I don't know what is wrong with my code, but I believe it has something to do with the scanner being close. Here is the error message i receive after inputting Numbers.txt.

java.lang.IllegalStateException: Scanner closed
at java.util.Scanner.ensureOpen(Unknown Source)
at java.util.Scanner.hasNext(Unknown Source)
at StatsDemo.main(StatsDemo.java:48)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at edu.rice.cs.drjava.model.compiler.JavacCompiler.runCommand(JavacCompiler.java:272)

Java Code:

import java.text.DecimalFormat; //for number formatting
import java.util.Scanner; //for keyboard input
import java.io.*; //for using files
public class StatsDemo
{
public static void main(String [] args) throws IOException

[Code] .....

View Replies View Related

Read Input File And Create Output With Anagram For Words In File

Sep 24, 2014

Well my code is supposed to ask for an input file and then (ex: input.txt), read the input file and create an output.txt file with the anagram for the words in the file. Also it should be displayed on the screen. However my code doesn't display the anagram on screen or the output file!

Heres is the code:

import java.io.*;
import java.lang.*;
import java.util.*;

/* This program will read a file given by the user, read the words within the file and determine anagrams of the given words. If the file that the user inputs is empty, then the program will output "The input file is empty."
* The program will read the file line by line, counting the total number of words read. If there are more than 50 words, "There are more than 50 words."
* will be printed, and the program will terminate. After each line is read, the words in the line will be separated,punctuation characters will be removed, and upper case characters will be switched to lower case.
* If any word is larger than 12 characters, that word will not be considered in the total amount of words in the file and it will not be sorted.
* After each word is read, the letters will be sorted and stored into an array containing each
* word's 'signature'. After all the words have been read, words will be printed to the output file on the same line based upon their signature.
*/

public class Anagram {
//Creating constants for maximum words in file and maximum chars in word
public static final int MAX_CHARS = 12;
public static final int MAX_WORDS = 50;

[Code] ....

View Replies View Related

Read File And Input Each Line Of File Into Array

Mar 21, 2015

I am trying to read a file and input each line of the file into an array. I have not set the array size as I was hoping to fill the array using a while loop. Unfortunately the scope of the array does to work inside the while loop so I am being told that the array 'students' has not been initialised even though it has just outside of the while loop. Is it possible to do what I am trying to without having the array initialised in the while loop as surely the array will be reset every time if it was in the while loop? Here is my code:

public static void students(String file) throws FileNotFoundException {
try {
File studentInfo = new File(file);
Scanner input = new Scanner(studentInfo);
String[] students;

[Code] ....

View Replies View Related

File I/O - How To Process Contents From Input File

Mar 22, 2014

So my assignment is to read these values from an input file which I previously created. The 10 values represent miles traveled and I convert them using some formula my prof gave me to get the total cost, and output both values to an output file.

My programming question is the first number on the input file isnt a mileage value its the number 10, which is the number of values to be processed, which we're supposed to use in order to control a for or while loop which we'll use to process the contents of the input file. How would I create a while or for loop and get it to skip the first value of the input file?

We're not allowed to use arrays for this assignment.

Also here's my code so far, and it says its not being able to find the file, I made sure the file name is exactly as saved, and its saved in the same directory as the java class that i created for this assignment so I don't see what the problem could be?

Here's my the class with the main method

import java.util.*;
import java.io.*;
 public class QudratullahMommandi_3_07 {
 public static void main (String[]args)

[Code] ....

This is the error message I get

----jGRASP exec: javac -g QudratullahMommandi_3_07.java

QudratullahMommandi_3_07.java:17: error: unreported exception FileNotFoundException; must be caught or declared to be thrown
Scanner input = new Scanner(inputSource);
^
1 error

----jGRASP wedge2: exit code for process is 1.
----jGRASP: operation complete.

View Replies View Related

Loading File From Input

Mar 24, 2015

how I can change my code so that somebody can actually input the specified file path, rather than having it fixed in the code. I previously used

Scanner in = new Scanner(System.in);
System.out.println("What is the filename?");
String input = in.nextLine();
File file = new File(input);

But then the program would not display the frequencies.

import java.io.File;
import java.util.*;
/*
This program will allow the user to enter in a text file name, when prompted the program will anaylser the text and display the frequencies
*/
public class AssP {
public static void main(String[] args ) {
Scanner scan;
try {
Scanner scanner = scan = new Scanner(new File("C:/Users/Mary/workspace/Assingment/src/test.txt"));

[code]....

This is my current code and I need to so the user can load their own files.

View Replies View Related

FILE Input Without Delimiter

Apr 28, 2014

This is my input from my text file: 1|John Jay Smith|1985-01-10|2010-05-10|2014-03-05|212-222-2233..So, I have to convert 1 to integer. Break John Smith into first name as John and Middle name as Jay Last name as Smith.If no middle name is given then first is John and Last is Smith . Read 1985-01-10 as a date value . 2010-05-10 as another date value which could be null. 2014-03-05 as another date value which could be null. and at last 212-222-2233 as phone number.

Scanner sc = new Scanner (inFile);
sc.nextLine();
while (sc.hasNext()){

String row= sc.nextLine();

I want to read this line of input and assign the value accordingly.

View Replies View Related

Source File Input

Jun 8, 2014

how to add an error message when my program can't find the file the user inputs.

For example:

Enter your source code:
D:Data StructsProjectssrcHelloWorld (I didn't put .java on purpose)
Exception in thread "main" java.io.FileNotFoundException: D:Data StructsProjectsAssignment 3srcHelloWorld (The system cannot find the path specified)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(Unknown Source)
at java.io.FileInputStream.<init>(Unknown Source)
at java.io.FileReader.<init>(Unknown Source)
at HomeworkDriverFour.main(HomeworkDriverFour.java:14)
//Can I get rid of the exception above and replace it with "File not found!"

Enter your source code:This is what I have so far:

import java.io.*;
import java.util.*;
public class HomeworkDriverFour {
public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub

[code]...

View Replies View Related

Read From File Input

Oct 25, 2014

The program is reading from file input. how can I replace hate with love the file contains only one line.I hate programing!

Java Code:

[import java.util.Scanner;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
public class Program3 {
public static void main(String[] args) {
Scanner fileIn = null;

[code]...

View Replies View Related

How To Format Input File With Java

Oct 12, 2014

Is there anyway to format my input file "IF1.txt" into an excel/csv file, but with the content rearranged into a desired format? (all of this has to be done by a java program)

Here is the input file IFT.txt:

R1 : Integer,3 Food
R2 : Integer,3 ID
R3 : Integer,3 Temp
R4 : Integer,3 Weight
R5 : Integer,3 Age
R6 : Integer,3 Length

[code]...

Desired Output:

TIME Food ID Temp Weight Age Length
00:00:00.001 1 0 0 0 0 0
00:00:00.002 2 0 0 0 0 0

View Replies View Related

Parsing Input From A File Using Scanner

Mar 26, 2014

I'm having some kind of weird problem reading input from a file. It says that my scanner object I'm using to hold an item of information isn't initialized, when I do try to initialize it, it says error variable already initialized. I'm using the scanner to read input from a file whose contents are this

10
150.4
88.4
-3.14
499.4
799.4
1299.8
0
1900.2
901.7
4444.4

This is my program

import java.util.*;
import java.io.*;
public class QudratullahMommandi_3_07 {
  Toolkit_General toolKit = new Toolkit_General();
  public static void main (String[]args)throws IOException

[Code] .....

This is the error message

QudratullahMommandi_3_07.java:34: error: variable holder2 might not have been initialized
String holder2 = holder2.trim();
^
1 error

----jGRASP wedge2: exit code for process is 1.
----jGRASP: operation complete.

View Replies View Related

How To Open Random Input File

Oct 30, 2014

i dont know how to write main that would open the input file and read using this method...

[/package AssignmentSeven;
import java.io.*;
import java.util.Scanner;
public class Assignment7
{
public static void Towers(int nTowers, int fromTower1, int workTower2, int toTower3) {
if(nTowers == 1)

[code].....

View Replies View Related

Histogram Not Reading Input File

May 1, 2015

The following program should read in a file on my desktop (I have the path set in Netbeans to that location) and produce a Histogram. Instead I am receiving this error.

Exception in thread "main" javax.imageio.IIOException: Can't read input file!
at javax.imageio.ImageIO.read(ImageIO.java:1301)
at Histogram.main(Histogram.java:9)
Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds)

Here is the code for the Histogram:

import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
public class Histogram {
public static void main(String[] args) throws Exception {
int[][][] ch = new int[4][4][4];

[code]...

Why it's not reading the file?

View Replies View Related

Can't Give Input A File By Console

Sep 28, 2014

this is my code...in my code i cant give input form my console...it takes input but it doesn't save in a target file..My code is :-

package filetester;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;
 
[code]....

View Replies View Related

Compare User Input To Text File

Jun 6, 2014

I'm attempting to compare user input to a text file that I have set up whenever the user types in an employee ID number. I want to be able to tell the user that either the ID number is valid, or that it is not valid and must be re-entered by comparing it to the employee.txt file, and then record the valid ID number to the timeclock.txt file. I'm recording the next available employee ID number instead of the one I typed in. The output of the program looks like this: i82014/06/06 12:16:56 (I typed 1 as the employee ID.)

import java.text.*;
import java.util.*;
import java.io.*;
import java.nio.file.*;

public class TimeClockApp {
// declare class variables
private static EmployeeDAO employeeDAO = null;
private static Scanner sc = null;

[code]....

View Replies View Related

Scanning Input File Then Running Applet

Oct 14, 2014

So this is probably pretty simple but I can't seem to figure it out. My teacher wants us to write a code that scans a text file, then outputs some text based information AND displays an applet bar graph of the data sorta like this for the text:

Sample Bar Graph

1-10 |*****
11-20 |******
21-30 |**
31-40 |*
41-50 |***********
51-60 |******
61-70 |********
71-80 |***
81-90 |****
91-100 |****

and then an applet thats the same info just a little more graphic. My code interprets the input well, but when i try to make an applet output, the code basically forgets all of my variables and starts anew (when i just state the public static graphic (paint) class after everything) OR it refuses to scan the input file (if i switch the public class from main.....throw ExceptionIO to just public class graphic(paint))

Also, as a side note, any way to have java automatically determine how many separate lines there are in a text file without me having to manually count them.

import java.util.Scanner;
import javax.swing.JApplet;
import java.awt.*;
import java.io.*;
public class Project2 extends JApplet {

[Code] ....

View Replies View Related

Creating File Or Folder But Using User Input For Name

Nov 14, 2014

File dir = new File("file"); //creates folder named file
File dir1 = new File("file.txt"); //creates file

But I want to take in a file name from user e.g.

BufferedReader br = new BufferedReader(is);
String filename = br.readLine( );
File dir = new File(filename + ".txt");

its expecting a string literal is there a way round it to take a string???

View Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved