Get List / Map Or Array Of A Specific File Type Files In A Directory?

Sep 18, 2014

If I specify the directory in file type or path string type how can I get a list of files that are file type .yml in that folder, so I can loop through and do something with each single file.yml in that specified directory.

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File Is Not Visible Because It Is At Almost End Of Files In Directory

Jan 8, 2015

ensureFileIsVisible not working.

JFileChooser fileChooser = new JFileChooser();
fileChooser.setCurrentDirectory(new File(currentDirectory));
 
File f = new File(currentDirectory);
ArrayList<String> names = new ArrayList<>(Arrays.asList(f.list()));
for (String s : names)
if (s.startsWith(yearofIssueTXT.getText())) {
fileChooser.setSelectedFile(new File(s));
 
fileChooser.ensureFileIsVisible(fileChooser.getSelectedFile());
 
break;
}
 
int result = fileChooser.showOpenDialog(addNewCoinBody);


The file is not visible because it is at almost the end of the files in the directory. I want the filechooser to automatically scroll so that the file is seen in the list.

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Array / List Of Ints Contains Specific Number

Jan 24, 2014

I've been trying to make a list of numbers/ints and later on check that list for a specific number.

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Enum Type And Array List

Feb 10, 2015

Here I have an enum class

public enum Money{

ONE_PENNY(1),
TWO_PENCE(2),
FIVE_PENCE(5),
TEN_PENCE(10),
TWENTY_PENCE(20),
FIFTY_PENCE(50),
ONE_POUND(100),
TWO_POUNDS(200);

private int coin;
Money(int c) {
coin = c;
}
int showCoin() {
return coin;
}

and for a test class, I need an array list with a couple of coins in it (i.e. ONE_POUND, TWO_POUNDS) and a loop that adds together the values of the coins in the list and prints the result. How can I do this?

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Create Object Of List Type Such As Text File?

Dec 27, 2014

I want to create a program where I need to create an object of list type such as text file will contain nos like 1,2,3,4,5 and write into text file and delete the in FIFO order i.e 1,2,3,4,5...how i can achieve to write a program? I tried bt everytime got concurrent modification exception or Array out of bound exception.

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Public Method That Takes Array Of Type Object To Load Strings Into Linked List

Oct 13, 2014

I am having a little trouble with a part of my Java assignment that needs to have linked lists in it.

I need to write a public method that takes an array of type object to load strings into a linked list.

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How To Find Files In Given Directory

Aug 1, 2007

In my program I have to get directory name&address, in this directory is none, one, or more *.txt(maybe not *.txt files) and I have to read info from all of them.

On C++ is very easy to do that with "findnext, find last, findfirst", so how can I do this in Java?

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I/O / Streams :: How To Iterate Over Files In A Directory One By One

Oct 5, 2014

Requirements - Use only standard Java API and no apache file utils for this.

Most of the answers I found on the internet either dont meet this requirement or load all file names into an array which can consume too much memory when no. of files = 20,000+. how I can do this. Is there also a way to keep track of new files that were added during the execution of the loop in this code ?

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How To Read Only Text Files In A Directory

Apr 30, 2015

I've written a program to read files in a directory but I'd like for it to only read the text files of that directory.
 
import java.io.*; 
public class Data {
  public static void main(String[] args) throws IOException {
  String target_dir = "C:files";
  File dir = new File(target_dir);
  File[] files = dir.listFiles();
 
[Code] .....

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Changing Value In Specific Point Of Specific Line In TXT File

Feb 9, 2015

So here we go with my problem:

- from the main class will arrive three variable (String name_used, int level_choose, int level_result)

I have a .txt file with this kind of formatting:

mario 1 1 0 1 0 1
carlo 0 0 0 1 1 0
...

Where I use 1 and 0 in the main for write if the level (you see that the numbers are always sixr? are egual to six level existing) BEFORE is done correct or wrong

- when in the main a user make a level a feedback coming back from the class level saying if the user made the count correctly or wrong. and i wanna replace the value (1 or 0) in the txt file with the new level result.

So i have all what i need as parameters i think.

name_used to look for the correct line in .txt file with .indexOf
level_choosed to go throught the correct index of that line
level_result (1 or 2) to be replaced with the existing one

Java Code:

public void salvaRisultati(String name_used, int level_choosed, int result_of_level) throws FileNotFoundException{
}
} mh_sh_highlight_all('java');

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Finding Source Files In Other Directory With Class Path Option

Apr 23, 2015

I'm having another issue. I have 2 java source files(see below). They are place in the same directory. How do I compile them using classpath?

I have already tried 1st attempt :

javac -cp com.companyname.interview.DuplicateReplace.java DuplicateReplaceTest.java [did not work!]
2nd attempt: javac -cp DuplicateReplace.java DuplicateReplaceTest.java [again, did not work!]
package com.companyname.interview;
public class DuplicateReplace { /* code */}

[Code] ....

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Searching For Any Entered Text In A Directory Of Multiple Scanned PDF Files

Mar 31, 2015

Within tomcat "webapps" directory, have lots of scanned PDF files (size in KB and MB).Using Java and JSP, I want to search for any user entered text in these scanned PDF files.The result must display the name of those PDF files which has that entered text.

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How To Cache Data Reading From Collection Of Text Files In A Directory Using TreeMap

May 4, 2015

How can I Cache the data I'm reading from a collection of text files in a directory using a TreeMap? Currently my program reads the data from several text files in a directory and the saves that information in a text file called output.txt. I would like to cache this data in order to use it later. How can I do this using the TreeMap Class? These are the keys,values: TreeMap The data I'd like to Cache is (date from the file, time of the file, current time).
 
import java.io.*; 
public class CacheData {
  public static void main(String[] args) throws IOException {
  String target_dir = "C:Files";
  String output = "C:Filesoutput.txt";
  File dir = new File(target_dir);
  File[] files = dir.listFiles();
 
 [Code] ....

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Check Specific Value From A Specific Line From TXT File

Feb 8, 2015

I have some problem to understand the way to make this:

In my main class a user can save his name in a txt file (and the system initially will add 6 value equals to 0) than he can choose between 6 level and make it.

example of .txt file data:

mario 0 0 0 0 0 0
carl 0 0 0 0 0 0

AT THIS MOMENT i just made other class and they work, is this new one that is hard for me. I'm trying to make a class that:

1- (first method called verificaRisultati) take name_used and level_choosed from the main and go to check in the .txt file if that level before was done right(1) or wrong(0)

and return something like "before you made this level properly" or "before you made this level incorrectly" AND THEN let the user start with the level.

2- (second method called salvaRisultati) at the end of the level i wanna pass the result (correct/incorrect) to another method of this class that will save the value (1 or 0) associated to the user in the right position.

This is the class that i'm writing:

Java Code:

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
public class ResultUsers {

[Code] ....

I really need some hint and some code example because I'm stuck. How I can take exactly the line with the user name? How I can correctly split the line in an array and then read/modify the value for that level?

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Store Data From A File Into Array Of Type Product?

Mar 17, 2015

public class InputFileData {
/**
* @param inputFile a file giving the data for an electronic
* equipment supplier’s product range
* @return an array of product details
* @throws IOException
*/
public static Product [] readProductDataFile(File inputFile)
throws IOException{
// YOUR CODE HERE
}

This code is meant to be used to read a text file and store the data in an array of type Product[]. I know how to read in a text file and have it sort it into an array, but I've never seen code laid out in this fashion before (specifically "public static Product[]", and I'm unsure how to work with "(File inputfile)". I've looked all over the place but can't find any examples of anything like this.

Also, the code given cannot be changed, as it's that code I have to work with.

I still don't understand how to use it as a whole. For example, do I read the file in the main and have this method read that in and output to the Product class? Do I read the file in this method? I can't work out how to make this work when I have to use this method.

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Updating Specific Value In Linked List

Feb 18, 2014

I create and populate someLinkedList with '*' characters as soon as a gameLinkedList object is created, so my class is something like

private int size;
public class gameLinkedList{
private CharNode game;
public gameLinkedList(String someWord){
size=someWord.length();
for(int i=0;i<size;i++){CharNode aNode = new CharNode('p');

[Code] .....

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Searching Array - Read From A File That Is List Of Songs

Oct 10, 2014

I have an assignment for my intro class that requires me to read from a file that is a list of songs, their artists, and the year they were released. As seen below, a print line statement prompts the user to enter an artist name, and then it uses a buffered reader to gain input, and then it is supposed to match that input.I realize that this is not a complete statement, but I'm mostly concerned with getting the .indexOf statement to work.Currently it only returns the first object in the array.

for(int i = 0; i < song.length; i++) {
System.out.println("Enter an Artist name");
String input1 = kb.readLine();
if (song[i].getArtist().indexOf(input1) > -1) {
/*tried changing -1 to -2. When I do, it returns the
first array entry, regardless of what I input*/
System.out.println(song[i].toString());
}
}

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Servlets :: File Is Located In Root Directory Of Project But System Cannot Find File Specified

Jan 10, 2015

I need to make some operations with a file. I struggle to understand why Apache is throwing this error:

(The system cannot find the file specified)

My file is located in the root directory of the project.

And here is how I indicate the path to it:

String filePath = "default.jpg";
InputStream inputStream = new FileInputStream(new File(filePath));

If I put the file in the Eclipse folder, it works... But I need it to work if I put it in my project's root folder.

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How To Traverse Through Linked List And Remove Specific Element

Nov 12, 2014

I have to make a program that allows the user to make a linked list of Strings (names) and then choose who to eliminate.

For example: Five people in a linked list of Strings: I would like the program to ask the user to choose a number between 1 and 5. If the user chooses number 2, Mary is the second person in the linked list so she gets eliminated.

The problem is that I'm not sure how to traverse through the linked list because they are of type String value, and I am looking for the name using the corresponding integer I mentioned above. I think I have to use Nodes? Not very sure where to start right now.Here is my code:

package llchallenge;
import java.util.LinkedList;
import java.util.List;
import java.util.ListIterator;
import java.util.Scanner;

[code]...

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How To Traverse Through Linked List And Remove Specific Element

Nov 12, 2014

This is my first time using linked lists and for homework I have to make a program that allows the user to make a linked list of Strings (names) and then choose who to eliminate. For example,

Five people in a linked list of Strings: Joe, Mary, Sue, Tom, Hannah.

I would like the program to ask the user to choose a number between 1 and 5. If the user chooses number 2, Mary is the second person in the linked list so she gets eliminated.

The problem is that I'm not sure how to traverse through the linked list because they are of type String value, and I am looking for the name using the corresponding integer I mentioned above.

Here is my code:

package llchallenge;
import java.util.LinkedList;
import java.util.List;
import java.util.ListIterator;
import java.util.Scanner;
public class LLChallenge
{
List JosephusList = new LinkedList(); // order of names

[Code] ....

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Array Of Linked List / Reading From File - Index Out Of Bounce

Oct 17, 2014

I'm trying to read from a file. we made an array of LinkedList and when I'm reading from the file i get a runtime error "index out of bounce in line 66"

import java.lang.*;
import java.util.*;
public class HashTester{
LinkedList_t [] hash;
LinkedList_t [][] doubleHasher;
int size;

[Code] .......

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How To Convert Input Array Of Type Strings To Class Type

Aug 14, 2014

class Passenger{
String name;
int age;
char gender;
int weight;
public Passenger(){

[Code] ....

This is showing error.....error it gives isthat it cannot change from string type to passenger type......... How to do it??????

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Write Interface Directory To Manipulate Entries In Telephone Directory

Mar 12, 2014

this is the following task i am trying to do. Write an interface Directory to manipulate entries in a telephone directory for the University. The interface must support the following operations:

1) The ability to insert new entries into the directory. Entries should be stored in alphabetical order of surname.
2) Delete entries from the directory either by name or number
3) Provide a lookup method that will find the extension no of a member of staff given
his/her name. You should try to make this method run as efficiently as possible.
4) Change a person's telephone number
5) Print the telephone directory in a neatly tabulated fashion.

Write a class ArrayDirectory that implements this interface using an array to store the telephone directory information. The class must store the surname and initial for each member of staff and their telephone extension (a four digit number which may start with a zero). You may find it useful to define a class Entry to store information about individual entries. The entries should be read into the array from a text file consisting of multiple lines in the following format:

Surname<tab>Initials<tab>Telephone extension

The part that i am stuck on is trying to do the entry method, delete entries method, loop up method, change persons telephone number and be able to print it.

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Extract File In Same Directory As Source File

Jun 13, 2014

This is a snippet code that im developing. (no source of it) . I am facing a trouble to extract file in the same directory as the source file (example: extract here option)

public class HelperAction {
public static void unzip(String zipFilePath)throws IOException {
File dir = new File(zipFilePath.substring(0,zipFilePath.length()));
// create output directory if it doesn't exist
if(!dir.exists()) dir.mkdirs();
FileInputStream fis;

[Code] ....

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Servlets :: Url Pattern - Real Directory Vs Virtual Directory

May 26, 2014

Consider the url-pattern:
<url-pattern> /Beer/* </url-pattern>

The web app structure is: -

webapps
|
-->AdviceApp
|
-->WEB-INF
--> {{Beer}} This can be real or virtual.

My book says that /Beer/* can be a real or a virtual directory. What is the difference between the two and how do I create a virtual directory in tomcat ?

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No Such File Or Directory

Jan 8, 2015

So i have this program that is supposed to execute a command when a button is clicked. I get an error: java.io.IOException: Cannot run program "/Users /brianallison/Documents/Java/RELAP5": error=2, No such file or directory

The actual PATH should be /Users/brianallison/Documents/Java/RELAP5 GUI/issrs/Dist.At least that is where the Java app is and the executable that I am trying to execute when the butotn is clicked. Executable name is relap5.x or relap5.exe depending on the OS.

private void btnRunRelapActionPerformed(java.awt.event.ActionEvent evt) {
String in = " -i " + tfIntdta.getText();
String rst = " - r " + tfRstplt.getText();
String out = " -o " + tfOutdta.getText();
String strip = tfStpdta.getText();
String guistring = "-n gui";
String wd = System.getProperty("user.dir");
String osver = System.getProperty("os.name");
String app = "";

[code].....

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