I have to read some data from a .txt file. Each row contains a string.
Each string has to be displayed in a specific JTextField.
How can i solve the problem?
Thanks
Read the file line by line as described in the Java Tutorial | Reading, Writing, and Creating Files.
Call setText to set the text in a specific JTextField. e.g.
jTextField.setText(line);
Related
I am basically trying to write to a csv file, one of the cells in that csv file will contain multiple lines but one cell. I have read online that if you wrap it around "" you will generally be fine. This is the case in finder, however when I try to open it in excel it does not work that way what is your suggestion
Try to use this tutorial.
https://www.baeldung.com/apache-commons-csv
But, post your code to more detailed response
I have a text file with several lines of data like this line:
04498203648;5067670000002534;15:44:50.987;15:44:51.533;546
04498203649;5067670000002344;15:44:50.988;15:44:51.534;546
I wish I could open the file, read each line and every semicolon separated value and insert them into a row in Excel, keeping one value per cell. Also I need to put some format into these cells, like keeping the format "[h]:mm:ss.000" for the timestamp values.
I can read the text file line by line, obtain each semicolon separated value, but I am a bit lost in putting them into the Excel file. Any easy way or tricks for handling this?
I am thinking of something like assigning each element of a line to 5 different variables and then writing these variables in line to Excel.
Java newbie here. Thanks in advance.
I am making a project which reads a text file contains thousands of tweets, reads the file, splits the hastags and make operations on them. I wrote a text file by myself and everything worked fine. I tried to use text file in this website http://www.cis.upenn.edu/~cdmurphy/cit595/homework/tweets.txt and I got a problem. Part of my code is :
while (scan.hasNext())
{
//Operations
}
When I use the text file on that website, code skips this loop. According to Java, that text file hasn't got next lines. Can anybody tell me what's wrong with that file? Since my project will be graded by using that text file, I have to find the problem.
I have to read a text file and write it to an already existing excel file. The excel file is a customized excel sheet with different items in different columns. The items has different values for each of them... These items with there value can be found in a text file. But i dont have much idea as to how to do this.
E.g- example.txt
Name: John
Age=24
Sex=M
Graduate=M.S
example.xlsx
Age: Sex:
Name: Graduate:
Thanks in advance :)
Just as for so many other problems that need solved, there's an Apache library for that! In this case, it's the POI library. I've only used it for very basic spreadsheet manipulation, but managed that by just following a few tutorials. I'd link to one, but I can't now remember where it was.
Please see Apache POI-HSSF library for reading and writing Excel files with Java. There are some quick guides to get you started.
This post How to read and write excel file in java might help you.
You can also create a *.csv (comma separated value) file in Java. Just create a simple text file with CSV extension and put your values in there like that :
Age:,24,Sex:,M,
So you just separate your values with commas (or other delimiters like ';').
Every line in this file is a row, and every delimiter separates two columns. You won't be able to add colours/styles/formatting this way, but it gives you a file that is openable and understandable even without Excel (or other spreadsheet software).
I'm having trouble adding to an exsisting line in a text file without overwriting that particular line or adding a new line.
for example, i have a line in my text file which is:
hello my name is
I would like to add to this line so it becomes:
hello my name is joe bloggs
Thanks
i have a task to create a help desk program and i am trying to incorporate a feature that enables users to edit questions they have posted. as a result, the program will need to be able to append Any line within the text file - not necessarily just the last line
If it's not at the end of the file, you're in trouble - you're basically talking about inserting data in the middle of a file, which isn't traditionally supported by file systems.
The normal way to approach this is to create a new file - copy the portion before the insertion point from the old file, then write your new data, then copy the remainder of the original file afterwards. Finally, do whatever renaming/deleting you need.