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] ....

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Read Line Of Input For A File - String Tokenizer

Jan 27, 2015

So I'm having a problem with the .hasMoreElement() method. I try to read lineOfInput for a file which contains:

Hobbit, Long,t@gmail.com,475-555-4444,3
Long, Hobbit,b@yahoo.com,445-222-5342,2
Hobbit,Long,b@yahoo.com,465-222-5342,2
Help,Yerp,,455-222-2222,4

but when i get to the ,, on the last line I get a NoSuchElementException and the program crashes.

StringTokenizer inputField = new StringTokenizer(lineOfInput, ",");
while(inputField.hasMoreElements()) //for each fields is a line
{
lastName = inputField.nextElement().toString();
firstName = inputField.nextElement().toString();
email = inputField.nextElement().toString();
phoneNumber = inputField.nextElement().toString();
level = Integer.parseInt(inputField.nextElement().toString());
}

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Read A File And Then Output Back To Same File On New Line

Jan 24, 2015

I am trying to write to a file but everything I have tried doesn't seem to work. What I want to do is read a file and then output back to the same file on a new line. The text file contains the sentence "Java is a programming language".

import java.util.Scanner;
import java.io.*;
class HW1B {
public static void main(String[] args) {
Scanner fileIn = null;
try {
fileIn = new Scanner (new FileInputStream("text.txt"));

[Code] ....

These are the errors :

HW1B.java:19: error: no suitable constructor found for Scanner(FileOutputStream)
fileOut = new Scanner (new FileOutputStream("text.txt"));
^
constructor Scanner.Scanner(Readable) is not applicable
(argument mismatch; FileOutputStream cannot be converted to Readable)
constructor Scanner.Scanner(InputStream) is not applicable

[Code] ....

Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
2 errors

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How To Make File Reader Object Move To Next Line If There Is No More Input On Line

Feb 18, 2015

How do I make the file reader object move to the next line if there is no more input on the line. Here is my text and output file as you can see that my text file column cuts off on the 2nd line after 70. I want to read that next line which is 100 into my labs variable however its reading it into my final exams variable. I'll also post the code but I didn't think it was necessary.

textfile:
100908095
1008070
10070

output:
Labs Projects Tests Final Exams
100908095
1008070100
70

[import java.util.Scanner;
import java.io.*;
public class MyGrades
{
public static void main (String[] args) throws IOException
{
int lab, project, test;
int finalExam;//Par and Player values

[Code]...

not sure if I code wrapped it correctly

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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] ....

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Read File Line By Line

Dec 8, 2014

how to read file line by line ? Namely my input file I want to read look as follow:

AAA 1, 1
12 222 12
AAA 2, 2
11 122 11
 
My output file should look as follow:

1, 1, 12
1, 1 222
1, 1, 12
2, 2, 11
2, 2, 122
2, 2, 11
 
I think the lines need to be stored in ArrayList, then I would like those lines to write to csv file, but how on read I can construct such output file? This is my code for reading file
  
public ArrayList readFile(String filename)
{
try
{

[Code]....

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Read Text File Into Object Array And Creating Random Access File

Dec 8, 2014

I am working on a project that requires me to build a database with random access file, representing products, the base product contains a name (about 30 characters), a price (double), and a quantity (integer). I have worked on this project for probably 15+ hours and have tried so many things and feel like I've barley made any progress...

The part i am really struggling with is taking the data from the text file and creating an object array with it using the product class. Once ive accomplished that, i have to use that data to create a random access file with the data.

Here is the base Product class that must be used to create the objects for the array.

public class Product
{
public String pName;
public String stringName;
public double price;
public int quanity;

[Code] .....

And then here is the data from the text file that i must extract to use to create product objects.

Dill Seed,938,34
Mustard Seed,100,64
Coriander Powder,924,18
Turmeric,836,80
Cinnamon (Ground Korintje),951,10
Cinnamon (Ground) Xtra Hi Oil (2x),614,31
Cinnamon (Ground) High Oil (1X),682,19

These continue for about 40-50 entries, they are not separated by a blank line though i had to add those so it would display correctly, each entry is on its own line with name separated with spaces, then price after a comma, then quantity after the second comma.....

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Read Text File Into Array Ask User To Save File And Print Data

Jul 14, 2014

New to programming. Am supposed to create a program that reads a text file (of integers) and computes a series of computations on these integers. I don't have the code for the integers in my code yet, (i know how to do those), but am struggling getting the array to simply print in the print writer. I have the user select a text file, read the file with a scanner, and then save the computations done from my code into another file. specifically, the problem is as follows: Write a program that uses a file chooser dialog to select a file containing some integers. The file contains an integer N followed by N integers. The program then uses a file chooser dialog to let the user specify the name and location of an output file to write results to.The data written to the output file will be as follows

(1) The original list of N numbers from the input file,
(2) The original list of N numbers printed in reverse order of how they appear
in the input file.
(3) The sum and average of these numbers,
(4) The minimum of all the numbers,
(5) The maximum of all the numbers.

[import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.Writer;

[Code]....

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I/O - Read 11 Values From A Text File / Each Value On Separate Line

Mar 26, 2014

So I'm trying to read 11 values from a text file, each value on a separate line. The first value I use as loop control to run through calculations on the other ten and finally output both the numbers and the calculations to the console and an output file. I'm not getting a compiler error or a runtime error but my loop seems to stop after reading the first line. It also doesnt seem to be writing to my output file but does create it when I run the program. This is what my text file looks like

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

This is what my program looks like

import java.util.*;
import java.io.*;
 public class assignment7scratch
{
  Toolkit_General toolKit = new Toolkit_General();
  public static void main (String[]args)throws IOException

[Code] .....

so I dont get an error but this is what my output looks like

----jGRASP exec: java assignment7scratch

This program reads a list of values representing number of miles driven by individuals. It will output the dollar amount their rental cars cost.

Number of miles traveled on the left as well as amount reimbursed on the right

-----------------------------------------------
Miles Driven Amount reimbursed
150.427.072

----jGRASP: operation complete.

it also doesn't write anything to my output file, though it does create one.

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Pickup Selected Text File And Read Line By Line And Output Text Into Visual Text Pane

Dec 12, 2014

I am checking how to do following task.

01. pickup the selected text file and read the line by line and output the text in to visual text pane.

what i did:.

01. I wrote code that read the text file and output in to jave console/ also some of the interface.

the code read txt file:

Java Code:

String fileName = "C:/Users/lakshan/Desktop/lawyer.txt";
File textFile = new File(fileName);
Scanner in = new Scanner (textFile);
while(in.hasNextLine()){

[code]....

so it will read any text file dynamically and output to the text pane in interface. I think scanner code must be execute after the select the file from the browser and set the scanned result in to variable. then later out put the var as string in some jswing component?

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Read Lines With Specific Characteristics From A File / Exclude All Others Line?

Jan 16, 2014

I am trying to write method to read lines with some specification from a file. for Example,

my text file contains following:--

12-01-0113:26San Jose12.99DVD
12-12-3009:40Miami13.50Music
14-08-3010:20Arizona16.03Scientist
11-07-1009:10New York25.00ColdPlay
14-08-3010:20Arizona18.04MeetYou
14-08-3010:20Arizona50.03Scientist
11-07-1009:30New York25.00ColdPlay
11-07-1009:20New York25.00ColdPlay

tab separated values, for different columns and these are the lines only I want method to read.Now suppose if any is there as below, or even enter

12-01-0113:26San Jose12.99DVD
12-12-3009:40Miami13.50Music
14-08-3010:20Arizona16.03Scientist
11-07-1009:10New York25.00ColdPlay
14-08-3010:20Arizona18.04MeetYou
[new lines]
14-08-3010:20Arizona50.03Scientist
11-07-1009:30New York25.00ColdPlay
//This line should not be read
even this should not be read #$%^&
11-07-1009:20New York25.00ColdPlay

That particular line should be escaped. Till now I have done when the file format is proper, and it is as below:--
 
public static void main(String[] args) {
BufferedReader br = null;
String temp = null;
List<String> arrayRead = new ArrayList<String>();
try{
br = new BufferedReader(new FileReader("D: estingSalesData.txt"));

[code]....

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Read Property File From Command Line Argument In Java

May 8, 2015

I want to read property file in java from command line argument,i.e. if i have some parameters which i have to use separately , i comment the parameters which i don't have to use that time , then uncomment when i have to use.

Is there and way to read the required parameters through command line arguments in java.

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Read In Java Source Code File As Command Line Argument

Oct 31, 2014

I am trying to complete this question. I understand the most of it but I haven't go a clue to read in the file name.

Full question: Implement a program that reads in a Java source code file and checks to see if it has balanced {}brackets. Your program should use a stack, implemented as a linked list, to check the brackets.

NOTE: you can use a reference called top which points to the head of the list. Your program should run as a command line program and should take a filename as an argument and print one of BALANCED or NOT BALANCED.

For example: c:> java checkBalanced "myProgram.java" BALANCED

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Read Line From File And Save First String As Word And Remaining As Meaning

Jul 6, 2014

I have written the code to read the line from file and save first string as word and and remaining string as meaning..

E.g.: innovation a new method, idea, product, etc.

word = innovation

meaning = a new method, idea, product, etc.

In my code there is no error and have a mistake what it is means first assigning word is ok and while saving meaning ..it saves like

{
a a new a new method } like that

Java Code:

import java.io.BufferedReader;
import java.io.FileReader;
public class Dil{
public static void main(String[] arg)throws Exception
{
BufferedReader in;

[Code] ......

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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]...

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Output Contents Of Input File In Alphabetical Order One Word Per Line

Jun 22, 2014

I am having a lot of trouble with this lab. basically I have to make a text processor to read in code put it into a file and output the contents of the input file in alphabetical order one word per line. I have to reference the string varaibles input_filename and output_filename.

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;
import java.io.File;
public class TextProcessor {

[Code] ....

these are the guidelines to said lab:

1. In the main method define two Strings called input_filename and output_filename. I will be setting these Strings to my own file names for testing your code, so make sure you get these variable names correct, and that you use them properly in the following steps.
2. Read in the text contents of the file referenced by input_filename.
3. Split the contents of the input text into separate tokens, using whitespace as a delimiter.
4. Lower case the tokens.
5. OPTIONAL: remove punctuation
6. Alphabetize the tokens.
7. Using output_filename, write the alphabetized tokens to an output file, one token per line.
8. Be sure to close file streams - no resource leaks!
9. Use methods to separate functionality in your program where possible

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Why Won't Read Input File (WordPad Document)

Sep 12, 2014

I keep receiving an error in which State.Fall.txt can not be read. I can't point it directly to a drive because someone else needs to open it. I saved it in wordpad as a text file. My question is what did I do wrong in my code that it can't directly access the wordpad document? 
 
import java.io.*;
public class Main {
/**
* @param args the command line arguments
*
*/
public static void main(String[] args) throws IOException
{
// Create an array of individual state objects to hold 50 items

[Code] ....

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Make Library That Will Read Some Input Files From A File?

Apr 23, 2015

I am trying to make a Library that will read some Input Files from a File . Like When We Enter Nuber from a System.in

1
2
45
667

77
34

and then store these values in int[] array

What I want is I Save all these values in a File and at Run time pass path of that file to command line arguments and then int[] array will be initialize using that

something like this [URL]

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Unable To Read Input File When Adding Pictures To A JFrame

Aug 25, 2014

i've tried changing the path 10000 times. idk if its wrong in the code.

Java Code: import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

[Code]...

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How To Read A File Than Display It Into Array

Jul 13, 2014

I'm new to java and I'm trying to figure out how to read a file like this:

Jan26081.5910211.79
Feb23301.5918221.79
Mar24261.5922101.79
Apr23751.6921431.79
May24001.6915381.79

And output the file and print it into an array with total under it.

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How To Read Text File Into Array

Nov 17, 2014

I have to write a program for sorting an array of random numbers by the users choice. These random numbers are stored in a text file, which the user inputs, and is then stored into an array for sorting. I won't have a problem with the sorting algorithms, but I've never had to read a text file and store it into an array before

The text file has the numbers stored like so :
148
626
817
4
312
652
643
etc....

I gather that I'll probably have to user the Scanner for the user to input the text file name, but how do I store it to an array? So far I only have the bones of the program done, like so

import java.util.Scanner;
public class SortingAlgorithms {
public static void main(String[] args) {

[Code].....

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Read Text File And Put It In 2D Array

Oct 25, 2014

I am trying to read in lines of text from a file then prints out the text. I only need one 2D array and can't copy from one array to another.This how the file looks like:

4 4
FILE
WITH
SOME
INFO

I have been able to read the file but when I am trying to run my program I have blank spacing instead of an array.

import java.util.Scanner;
import java.io.*;
public class Array {
public static void main(String[] args) throws IOException{

[code]....

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Read Numeric Values From A Text File Into Array

Oct 28, 2014

I am trying to read numeric values from a text file into an array. This is what i have so far but when i compile it, it doesn't run and give me a result.

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;
public class question2_17110538 {

[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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How To Read Text File In Array And Show It To Textfield

May 30, 2014

I have a problem about read text file in array and show it to textfield :

Content the file:

I want read line 1 to textfield 1, line 2 to textfield 2,....

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How To Read Data From Text File And Place Into Array

Nov 15, 2014

I'm trying to figure out the necessary code for reading integers from a text file, then placing them withing the two-dimensional array I have created, and then finally printing the array using a nested for-loop. I have attached the file I would like to read from. I'm having trouble figuring out how to reference the text file with the integers, and also how to properly create a dynamic preface for each row of the array. I want the preface to display as "Week #: ", with # being the row number. I tried to create an integer to be used that way, but NetBeans tells me whatever integer I declare has already been defined in method main. I know I need to use scanner to read the file. I would like the output to display like this:

Quote
Temperature Data

Week 1: 73 71 68 69 75 77 78
Week 2: 76 73 72 72 75 79 76
Week 3: 79 82 84 84 81 78 78
Week 4: 75 72 68 69 65 63 65

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