Parsing CSV File - Column And Row Data?
Dec 19, 2014
I am trying to merge two files together using the Apache Commons CSV library. I figured it was easier to use this than to write my own implementation.
The first problem is that the output contains the underlying class logic and as a results my output contains a bunch of un-needed data. How do I get rid of this? I just want the column and row data, nothing else.
Example
I want this:
customerNo, firstName, lastName, birthDate, mailingAddress, married, numberOfKids, favouriteQuote, email, loyaltyPoints
1, John, Dunbar, 13/06/1945, 1600 Amphitheatre Parkway Mountain View, CA 94043
But I get this:
CSVRecord [comment=null, mapping=null, recordNumber=1, values=[customerNo, firstName, lastName, birthDate, mailingAddress, married, numberOfKids, favouriteQuote, email, loyaltyPoints]]
CSVRecord [comment=null, mapping=null, recordNumber=2, values=[1, John, Dunbar, 13/06/1945, 1600 Amphitheatre Parkway
Mountain View, CA 94043
The second problem is that I just want the row Headers from the first file, but the row headers from my second file are still being included in my output. I used withSkipHeaderRecord(true), but it didn't have the desired results.
Code is below.
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.Reader;
import java.util.ArrayList;
[Code] .....
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Apr 5, 2014
I am suppose to display some information from some text files I tried to do that but the output gives me information from one text file and not information from all text files.
public static void main(String args[]) throws IOException {
String occupations;
double unemployRate_By_Occupations_2008;
double unemployRate_By_Occupations_2009;
double unemployRate_By_Occupations_2010;
//declare the file object and open the file "occupations.txt";
File myFile = new File("occupations.txt");
[code]....
The first text file is:
2.5
3.3
2.6
3.1
2.4
2.7
2.6
[code]....
the second text file is:
4.6
5.7
5.2
6.9
4.5
4.3
[code]....
The third text file is :
4.8
5.6
5.2
6.2
4.6
4.6
2.7
[code]....
Reason for edit:: Renamed title to be more descriptive, added code tags, and removed font formatting
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Mar 14, 2015
I have an xml with 'n' number of data which i am parsing,for test i hardcoded without looping has below,now the below line is just parsing and showing the data for index '1' ,i need to loop this and i am not sure how can i do this.How do i find the length of obj and loop,i cannot find any method in SoapObject.I used like below but the data is getting overridden after parsing
for(int i=0;i<obj.getPropertyCount();i++) {
KSoap2ResultParser.parseBusinessObject(obj.getProp erty(i).toString(), getReminder);
}
call in another class
public static void parseBusinessObject(String input, Object output) throws NumberFormatException, IllegalArgumentException, IllegalAccessException, InstantiationException{
[code]...
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Oct 23, 2014
public class DemoBlock{
public static void main(String[] args){
System.out.println("Demonstrating block scope");
int x = 1111;
System.out.println("In first block x is " + x);
[code]....
this is the error I'm getting..reached end of file while parsing. I think this is referred to as either an extra curly brace or that I am missing a curly brace but I'm not 100% sure.
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Nov 18, 2014
I have to read this CSV file into an arraylist. Arraylist i call weight. The data in the csv file has 200 double values which is the weight of all the 200 bananas. Since the csv file is a string i guess I cannot create an double arraylist from scratch, but i have to parse the csv file afterwards, right? Well this does not work and ill show you the code in a bit, just need to state all my issues.
My second issue is how to be able to print out the the weight items (in this case bananas) next to the weight of the bananas taken from the array? This has to be done by constructor i assume? I just dont know how constructors work with arraylists.
Id like it to look something like this in the output window.
Banana 34,55
Banana 43,55
Banana 23,74
and so on (200 times)
so these are my issues, how to parse and how to print the arraylist weights and the item banana in the output window with constructor. Here is the code.
package Main;
import java.io.BufferedReader;
import java.io.FileReader;
import java.util.ArrayList;
import java.io.IOException;
import java.io.Serializable;
import javax.swing.JOptionPane;
[Code] ...
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Jun 10, 2015
I have the bellow file. What I should do the parsing sentences from the given file?
[ A/DT form/NN ]
of/IN
[ asbestos/NN ]
once/RB used/VBN to/TO make/VB Kent/NNP
[ cigarette/NN filters/NNS ]
has/VBZ caused/VBN
[ a/DT high/JJ percentage/NN ]
of/IN
[Code] ....
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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.
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Jan 16, 2014
class thread1 implements Runnable{
Thread t;
thread1() {
t=new Thread(this,"my thread");
System.out.println("current thread : "+t);
t.start();
[Code] ....
I m getting an error : threadmain.java:44: error: reached end of file while parsing ....
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May 9, 2015
I thought of processing line by line using scanner and then split each line in the ":" . But then i stuck, i only need the right part of the ":" so that i can save it to a class e.g. John Doe, 133456593, married etc.
Java Code: Name: John Doe
TRN: 133456593
Status: Married
Income: 22500
Receipts:
Receipt ID: 1
Date: 25/2/2014
Kind: Basic
Amount: 2000
Company: Hand Made Clothes
Country: UK
City:London
Street: Cambridge
Number: 10
Receipt ID: 2
Date: 28/2/2014
Kind: Entertainment
Amount: 500
Company: Floca Cafe
Country: Italy
City: Rome
Street: Piazza
Number: 4 mh_sh_highlight_all('java');
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Mar 1, 2015
Java Code:
package inventory;
import java.util.ArrayList;
import java.util.Scanner;
import java.io.FileReader;
import java.io.FileNotFoundException;
public class Inventory
{
private static Scanner scan = new Scanner(System.in);
public static void main(String[] args) {
ArrayList<Product> InventoryList = new ArrayList<>();
Inventory I = new Inventory();
int option = 0;
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May 8, 2014
How can insert value into sql server column of data type 'datetime' with jdbc the methods in java.sql are 'setdate()' and 'setTime()'
How can I do this. I'm using java.time.LocalDateTime.
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Oct 12, 2014
Every time i compile my program, i get these errors..
java:102: error: reached end of file while parsing
}
^
java:116: error: reached end of file while parsing
2 errors
I'm almost done with everything before the arithmetic part of the program. here is my code..
[import java.util.Scanner;
public class pdonahue_Numerology
{
public static void main (String[] args)
{
int month = 0;
int day = 0;
[Code] .......
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Apr 1, 2014
How to maintain quotes in a text file? If no source files .
Новый точечный .jpg
Prompt in what direction to go .... maybe you can use other languages to do it?
Заранее СПасибо!!!
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Nov 13, 2014
I have a requirement where in my primefaces datatable ,the filterMatchMode attribute(like any part of field,whole field) needs to be selected by the user by select menu .
To achieve this i have declared a variable in my viewscoped managed bean as filterCriteria and set the filterMatchMode attribute as filterMatchMode="#{beanName.filterCriteria}".The bean variable is getting set in the managed bean on submit but the filtering is not happening,i am getting empty message.
Also when i remove the keyed in value from filter box the data table is not restored which otherwise must be restored in normal situations. I have used and modified the example code given in primefaces showcase here.The code snippet is as below
<h:form id="tblFrm">
<h:selectOneMenu id="filterOptions"
value="#{dtFilterView.filterOption}" required="true"
requiredMessage="You must select an option!">
<f:selectItem id="hd1" itemLabel="Select" itemValue="#{null}" />
[code]....
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Nov 29, 2014
I am new to java coding. so reading the log file using java code.
1) I wish to parse a file, and find a value for variable e.g. [StorageVersion].
2) After finding the value, it will be pushed to database.
Log File Path e.g. C:Temp est.txt"
Sample Logs :
{
//NAME
[1.2.2917] := s['3.4.454545'];
//Parameter
[1.2.2947] := s['1.2.56778'];
//Enabled
[1.2.3910] := B['22.43434.12232'];
//MAXCLOUMNNAME
[1.2.4217] := N['1.7.899982'];
//StorageVersion
[1.2.2917] := K['706146.0.22106932'];
}
From above log file, the Value i need is "706146.0.22106932"
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Mar 3, 2014
personid gender height class
1 female 1.6 short
2 male 2.0 tall
3 male 1.85 medium
4 female 1.9 medium
5 male 1.7 short
6 female 1.8 medium
7 female 1.95 medium
for eg i have to find minimum and maximum height from column height.
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Jan 30, 2015
I am having a hard time compiling this code: I need to calculate the gpa of each student in the csv file which looks like this:
ID First Name Last NameClass LevelDesired ClassCreditsPoints GPA
9410917 Reagan Walls SophomoreCOMP 18275 77 1.026667
13498070 Stewart Fry Senior COMP 10070 92 1.314286
37500410 Talon Witt Junior COMP 100107 389 3.635514
47845461 Ciara Beard Grad COMP 11097 196 2.020619
The GPA column needs to be added by dividing the points by credits. I also need to sort the class level column by class level. For example:
ID First NameLast NameClass LevelDesired ClassCreditsPointsGPA
9410917 Reagan Walls SophomoreCOMP 18275 77 1.026667
46309070 Ivy Valdez SophomoreCOMP 1006 16 2.666667
37405616 Miriam Welch SophomoreCOMP 11057 179 3.140351
Here is my code:
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.lang.String;
import java.io.File;
import java.io.PrintStream;
import java.io.Serializable;
import java.io.ObjectOutputStream;
import java.io.FileOutputStream;
import java.util.Comparator;
[code]...
I am taking the two things that needed to be outputted, one at a time. Working on the GPA portion.
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Apr 13, 2014
I have to write a program that reads from a file like this( in attached file)
after line 28 ,column 5 have H,G,S...,
I WANT TO READ THIS COLUMN AND SPLIT THE 4 AND MORE H SAME HHHH AND MORE IN ONE SEPARATE FILE AND IN ANOTHER FILE HAVE EEEE AND MORE ....
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May 25, 2013
how to set the columnwidth in csv file using javacode.
I used FileWriter class to upload data into the csv file but csv file is taking default width while showing content. Is there a way to set the fixed column width or set width dinamically based on value?
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Sep 25, 2014
I want to read this csv file and store contents on column basis; as date (single array) for all dates. open, high, low and close and be able to manipulate individual elements of the array such as Sum += close[i];
public void pratice() throws Exception {
// Create a File instance
BufferedReader br=new BufferedReader(new FileReader("gtk.csv"));
content = new String[1000];
while(content !=null) {
content[++count] = br.readLine();
[Code] .....
the file looks like this
date Open high low close
12-12-2011 15.00 15.40 14.5 15.2
11-12-2011 15.02 15.70 14.9 15.00
10-12-2011 14.70 16.00 14.70 15.02
...
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Dec 17, 2014
I need to print contents of database to excel file.Apache POI is the solution but I am not finding a way to print the DB column names/headers into the excel.
E.g.:
incase csv we have opencsv CSVWriter writer = new CSVWriter(new FileWriter(fileName));
System.out.println("writer");
writer.writeAll(rs, true);
will print the db contents with the column headers dynamically whatever the query may be.
Any solution where we can print data and column names without know the query previously as we are getting query at the run time and each time the query is different.
INPUT
DATABASE
Emp Id. Emp Name
111 Mr.Test
EXCEL
Emp Id. Emp Name
111 Mr.Test
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In the for loop below, I thought I would see if it would work, but it does not. The loop only executes once and does not allow me to enter data.
public class Records {
public static void main(String [] args) throws IOException {
Scanner input = new Scanner(System.in);
FileWriter fw = new FileWriter("dbs3.java");
BufferedWriter bw = new BufferedWriter(fw);
PrintWriter pw = new PrintWriter(bw);
System.out.println("NEW EMPLOYEE DATA SHEET");
System.out.print("Number of new employees: ");
int number = input.nextInt();
[Code] ....
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