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open text file and edit any line start with name
I have a text file
How can I write java swing code that opens the file and adds end of line this character </ok> each line that starts with the <ok>
The following items are available in the text file
It should be like this<li>123> <ok>235> <li>345:1:2> <ok>345:1:2>
<li>123> <ok>235</ok> <li>345:1:2> <ok>345:1:2</ok>
Last edited by cnmeysam; March 21st, 2021 at 06:31 PM.
Re: open text file and edit any line start with name
What have you tried?
What are the steps the program needs to take to provide the desired solution?
If you don't understand my answer, don't ignore it, ask a question.
cnmeysam (March 21st, 2021)
Re: open text file and edit any line start with name
Unfortunately, I do not know any solution and I have not tried anything
I searched on Google and did not find a way
Last edited by cnmeysam; March 21st, 2021 at 10:17 AM.
Re: open text file and edit any line start with name
Can you describe the steps to take without considering any specific programming language?
What if the lines in the file were pieces of paper with words written on them and you had a pair of scissors, tape and a pen to make changes to the what was written on the paper.
What steps would you take to get the desired output?
Once you get the list of steps we can work on what statements would do that in java.
If you don't understand my answer, don't ignore it, ask a question.
cnmeysam (March 21st, 2021)
Re: open text file and edit any line start with name
It must first open a saved text file
Access the values inside that file
Find the lines that start with <OK>
Recognize the number of characters after <OK>
don't touch or edit that characters
Scroll to the end of the line
delete > from end of that line
and add </OK> to end of that line ( or add </OK ( before > )end of that line)
Repeat this until all lines starting with <OK> end with </OK>
And ignore all other lines
Last edited by cnmeysam; March 21st, 2021 at 11:04 AM.
Re: open text file and edit any line start with name
Ok, work on those steps first.It must first open a saved text file
Access the values inside that file
Define a File class object with the path to the text file.
Define a Scanner class object that receives that File class object in its constructor.
For a test:
read the first file of the file into a String variable by using the Scanner class's nextLine method.
Print the contents of that line to show that you have read the first line ok.
If you don't understand my answer, don't ignore it, ask a question.
cnmeysam (March 21st, 2021)
Re: open text file and edit any line start with name
some think like that?
File file = new File("G:\\aaa\\1.txt"); try (Scanner sc = new Scanner(file, StandardCharsets.UTF_8.name())) { while (sc.hasNextLine()){ System.out.println(sc.nextLine()); } } catch (IOException e) { e.printStackTrace(); }
Last edited by cnmeysam; March 21st, 2021 at 11:26 AM.
Re: open text file and edit any line start with name
What happened when you compiled and executed the program?
If you don't understand my answer, don't ignore it, ask a question.
cnmeysam (March 21st, 2021)
Re: open text file and edit any line start with name
All text inside the text box was printed
<Azan ID="1"> <day>Sunday</day> <date>1400/01/01</date> <morning>04:43:02</morning> <Rise>06:06:49 <Noon>12:12:09 <Sunset>18:17:30 <Sunsets>18:35:33 <midnight>23:30:16 </Azan> <Azan ID="2"> <day>Monday</day> <date>1400/01/02</date> <morning>04:44:02</morning> <Rise>06:07:49 <Noon>12:14:09 <Sunset>18:19:31 <Sunsets>18:37:33 <midnight>23:35:10 </Azan> . . . . .
Last edited by cnmeysam; March 21st, 2021 at 11:37 AM.
Re: open text file and edit any line start with name
Ok then the program works so far.
Next these steps:
Look at the String class for methods to do those steps to the String read by the nextLine method.Find the lines that start with <OK>
Recognize the number of characters after <OK>
don't touch or edit that characters
Scroll to the end of the line
delete > from end of that line
To remove the ending character of a line use the substring method that starts at 0 ends one char short of the end.
For debugging: Be sure to print out the new String contents after each new String is created from the last String.
If you don't understand my answer, don't ignore it, ask a question.
cnmeysam (March 21st, 2021)
Re: open text file and edit any line start with name
i cant understand how must do it!!
Re: open text file and edit any line start with name
Ok, one step at a time:
Look at the String class's methods.Find the lines that start with <OK>
Find the method that looks at the starting characters in the String.
Here is a link to the API doc for the Java SE 8 classes:
https://docs.oracle.com/javase/8/docs/api/index.html
Find String in the lefthand window, click it and the API doc for String will be displayed,
Scroll down to the Method Summary section and read them
If you don't understand my answer, don't ignore it, ask a question.
cnmeysam (March 21st, 2021)
Re: open text file and edit any line start with name
something like this
but just i seeString myStr = sc.nextLine(); System.out.println(myStr.startsWith("<ok>"));
false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false 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false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false false false false true false false false false false false false
Re: open text file and edit any line start with name
You need to print out the value in myStr so you can see if the results of the test are correct.
If you don't understand my answer, don't ignore it, ask a question.
cnmeysam (March 21st, 2021)
Re: open text file and edit any line start with name
now how i must say if myStr is true add end of line </ok> ?
--- Update ---
Yes, it printed all the lines starting with <OK> correctly
--- Update ---
this is my code
File file = new File("G:\\aaa\\oq.txt"); try (Scanner sc = new Scanner(file, StandardCharsets.UTF_8.name())) { while (sc.hasNextLine()) { // System.out.println(sc.nextLine()); String myStr = sc.nextLine(); // System.out.println(myStr.startsWith("<ok>")); if(myStr.startsWith("<ok>")==true){ System.out.println(myStr); } } } catch (IOException e) { e.printStackTrace(); }
Re: open text file and edit any line start with name
Use an id statement:if(tested condition) { // do something if condition true }else { // do this if false }
Use the + concatenation operator to concatenate one String to another:add end of line </ok>
oneString + anotherString
If you don't understand my answer, don't ignore it, ask a question.
cnmeysam (March 21st, 2021)
Re: open text file and edit any line start with name
Now how do I say </ok> at the end of those lines and update text file?
run: <ok>04:43:02 <ok>05:41:30 <ok>05:39:58 <ok>05:38:26 <ok>05:36:53 <ok>05:35:20 <ok>05:33:46 <ok>05:32:12 <ok>05:30:38 <ok>05:29:04 <ok>05:27:29 <ok>05:25:55 <ok>05:24:20 <ok>05:22:45 <ok>05:21:10 <ok>05:19:34 <ok>05:17:59 <ok>05:16:24 <ok>05:14:49 <ok>05:13:14 <ok>05:11:39 <ok>05:10:04 <ok>05:08:29 <ok>05:06:54 <ok>05:05:20 <ok>05:03:46 <ok>05:02:12 <ok>05:00:39 <ok>04:59:06 <ok>04:57:33 <ok>04:56:01 <ok>04:54:29 <ok>04:52:58 <ok>04:51:27 <ok>04:49:57 <ok>04:48:28 <ok>04:46:59 <ok>04:45:31 <ok>04:44:04 <ok>04:42:37 <ok>04:41:11 <ok>04:39:46 <ok>04:38:22 <ok>04:36:59 <ok>04:35:37 <ok>04:34:16 <ok>04:32:57 <ok>04:31:38 <ok>04:30:20 <ok>04:29:04 <ok>04:27:49 <ok>04:26:35 <ok>04:25:23 <ok>04:24:12 <ok>04:23:02 <ok>04:21:54 <ok>04:20:47 <ok>04:19:42 <ok>04:18:39 <ok>04:17:37 <ok>04:16:38 <ok>04:15:39 <ok>04:14:43 <ok>04:13:49 <ok>04:12:56 <ok>04:12:06 <ok>04:11:17 <ok>04:10:30 <ok>04:09:46 <ok>04:09:04 <ok>04:08:23 <ok>04:07:45 <ok>04:07:10 <ok>04:06:36 <ok>04:06:05 <ok>04:05:36 <ok>04:05:09 <ok>04:04:45 <ok>04:04:23 <ok>04:04:04 <ok>04:03:47 <ok>04:03:33 <ok>04:03:21 <ok>04:03:11 <ok>04:03:04 <ok>04:03:00 <ok>04:02:58 <ok>04:02:58 <ok>04:03:01 <ok>04:03:06 <ok>04:03:14 <ok>04:03:24 <ok>04:03:37 <ok>04:03:52 <ok>04:04:10 <ok>04:04:29 <ok>04:04:52 <ok>04:05:16 <ok>04:05:42 <ok>04:06:11 <ok>04:06:42 <ok>04:07:15 <ok>04:07:50 <ok>04:08:27 <ok>04:09:06 <ok>04:09:47 <ok>04:10:29 <ok>04:11:14 <ok>04:12:00 <ok>04:12:47 <ok>04:13:37 <ok>04:14:27 <ok>04:15:20 <ok>04:16:13 <ok>04:17:08 <ok>04:18:04 <ok>04:19:01 <ok>04:19:59 <ok>04:20:59 <ok>04:21:59 <ok>04:23:00 <ok>04:24:02 <ok>04:25:05 <ok>04:26:09 <ok>04:27:13 <ok>04:28:17 <ok>04:29:23 <ok>04:30:28 <ok>04:31:35 <ok>04:32:41 <ok>04:33:48 <ok>04:34:55 <ok>04:36:02 <ok>04:37:10 <ok>04:38:17 <ok>04:39:25 <ok>04:40:33 <ok>04:41:40 <ok>04:42:48 <ok>04:43:55 <ok>04:45:03 <ok>04:46:10 <ok>04:47:17 <ok>04:48:24 <ok>04:49:31 <ok>04:50:37 <ok>04:51:43 <ok>04:52:49 <ok>04:53:54 <ok>04:55:00 <ok>04:56:04 <ok>04:57:09 <ok>04:58:13 <ok>04:59:16 <ok>05:00:20 <ok>05:01:22 <ok>05:02:25 <ok>05:03:27 <ok>05:04:28 <ok>05:05:29 <ok>05:06:30 <ok>05:07:30 <ok>05:08:30 <ok>05:09:29 <ok>05:10:28 <ok>05:11:27 <ok>05:12:25 <ok>05:13:22 <ok>05:14:19 <ok>05:15:16 <ok>05:16:12 <ok>05:17:08 <ok>05:18:03 <ok>05:18:59 <ok>05:19:53 <ok>05:20:48 <ok>05:21:41 <ok>05:22:35 <ok>05:23:28 <ok>05:24:21 <ok>05:25:14 <ok>05:26:06 <ok>05:26:58 <ok>05:27:50 <ok>05:28:41 <ok>04:29:32 <ok>04:30:23 <ok>04:31:14 <ok>04:32:04 <ok>04:32:54 <ok>04:33:44 <ok>04:34:34 <ok>04:35:24 <ok>04:36:13 <ok>04:37:03 <ok>04:37:52 <ok>04:38:41 <ok>04:39:30 <ok>04:40:19 <ok>04:41:08 <ok>04:41:56 <ok>04:42:45 <ok>04:43:34 <ok>04:44:22 <ok>04:45:11 <ok>04:46:00 <ok>04:46:48 <ok>04:47:37 <ok>04:48:26 <ok>04:49:14 <ok>04:50:03 <ok>04:50:52 <ok>04:51:41 <ok>04:52:30 <ok>04:53:19 <ok>04:54:08 <ok>04:54:57 <ok>04:55:47 <ok>04:56:36 <ok>04:57:26 <ok>04:58:16 <ok>04:59:05 <ok>04:59:55 <ok>05:00:45 <ok>05:01:36 <ok>05:02:26 <ok>05:03:16 <ok>05:04:07 <ok>05:04:57 <ok>05:05:48 <ok>05:06:39 <ok>05:07:30 <ok>05:08:21 <ok>05:09:12 <ok>05:10:03 <ok>05:10:54 <ok>05:11:45 <ok>05:12:36 <ok>05:13:27 <ok>05:14:18 <ok>05:15:09 <ok>05:16:00 <ok>05:16:51 <ok>05:17:42 <ok>05:18:33 <ok>05:19:23 <ok>05:20:14 <ok>05:21:04 <ok>05:21:54 <ok>05:22:44 <ok>05:23:33 <ok>05:24:22 <ok>05:25:11 <ok>05:25:59 <ok>05:26:47 <ok>05:27:34 <ok>05:28:21 <ok>05:29:08 <ok>05:29:54 <ok>05:30:39 <ok>05:31:24 <ok>05:32:08 <ok>05:32:51 <ok>05:33:33 <ok>05:34:15 <ok>05:34:56 <ok>05:35:36 <ok>05:36:15 <ok>05:36:53 <ok>05:37:31 <ok>05:38:07 <ok>05:38:42 <ok>05:39:16 <ok>05:39:49 <ok>05:40:21 <ok>05:40:52 <ok>05:41:21 <ok>05:41:49 <ok>05:42:16 <ok>05:42:41 <ok>05:43:05 <ok>05:43:28 <ok>05:43:49 <ok>05:44:09 <ok>05:44:28 <ok>05:44:45 <ok>05:45:00 <ok>05:45:14 <ok>05:45:26 <ok>05:45:36 <ok>05:45:45 <ok>05:45:53 <ok>05:45:58 <ok>05:46:03 <ok>05:46:05 <ok>05:46:05 <ok>05:46:04 <ok>05:46:02 <ok>05:45:57 <ok>05:45:51 <ok>05:45:43 <ok>05:45:33 <ok>05:45:22 <ok>05:45:08 <ok>05:44:53 <ok>05:44:37 <ok>05:44:18 <ok>05:43:58 <ok>05:43:36 <ok>05:43:12 <ok>05:42:47 <ok>05:42:19 <ok>05:41:50 <ok>05:41:20 <ok>05:40:47 <ok>05:40:13 <ok>05:39:38 <ok>05:39:00 <ok>05:38:21 <ok>05:37:41 <ok>05:36:58 <ok>05:36:14 <ok>05:35:29 <ok>05:34:42 <ok>05:33:53 <ok>05:33:03 <ok>05:32:12 <ok>05:31:19 <ok>05:30:24 <ok>05:29:28 <ok>05:28:31 <ok>05:27:32 <ok>05:26:32 <ok>05:25:30 <ok>05:24:28 <ok>05:23:24 <ok>05:22:18 <ok>05:21:12 <ok>05:20:04 <ok>05:18:55 <ok>05:17:44 <ok>05:16:33 <ok>05:15:21 <ok>05:14:07 <ok>05:12:52 <ok>05:11:37 <ok>05:10:20 <ok>05:09:02 <ok>05:07:43 <ok>05:06:24 <ok>05:05:03 <ok>05:03:42 <ok>05:02:20 <ok>05:00:56 <ok>04:59:33 <ok>04:58:08 <ok>04:56:42 <ok>04:55:16 <ok>04:53:49 <ok>04:52:22 <ok>04:50:54 <ok>04:49:25 <ok>04:47:55 <ok>04:46:25 <ok>04:44:55
i printed by this code
but i don't now how i must update text file (G:\\aaa\\oq.txt)System.out.println(myStr.concat("</ok>"));
Last edited by cnmeysam; March 21st, 2021 at 12:29 PM.
Re: open text file and edit any line start with name
Is the code now updating lines as desired?
One way to update the file is to copy and edit all the lines into a List, then write the contents of the List to the file.
It is not possible to update the lines in the file while they are on the disk when the length of the lines is changing.
Look at the PrintWriter class's println method for writing the lines from the List to the file.
If you don't understand my answer, don't ignore it, ask a question.
cnmeysam (March 21st, 2021)
Re: open text file and edit any line start with name
Can you write me the code to write the file?
Re: open text file and edit any line start with name
You are making good progress. You should be able to do it yourself.
Create a File for the output file
Create a PrintWriter using that File object in its constructor.
use the PrintWriter class's println() method to write the lines to the file.
Call the PrintWriter's close method after all the lines are written.
If you don't understand my answer, don't ignore it, ask a question.
cnmeysam (March 21st, 2021)
Re: open text file and edit any line start with name
it is my all code but write all lines in 1 line
how i can fix it?
File file = new File("oq.txt"); File files = new File("testFile1.txt"); try (Scanner sc = new Scanner(file, StandardCharsets.UTF_8.name())) { FileWriter writer = new FileWriter(files); while (sc.hasNextLine()) { // System.out.println(sc.nextLine()); String myStr = sc.nextLine(); if (myStr.startsWith("<Azan") == true) { System.out.println(myStr); writer.write(myStr); } if (myStr.startsWith("<Day>") == true) { System.out.println(myStr); writer.write(myStr); } if (myStr.startsWith("<Date>") == true) { System.out.println(myStr); writer.write(myStr); } if (myStr.startsWith("<Morning>") == true) { // myStr.concat(myStr+"</Morning>"); // System.out.println(myStr); System.out.println(myStr.concat("</Morning>")); writer.write(myStr.concat("</Morning>")); } if (myStr.startsWith("<Sunrise>") == true) { System.out.println(myStr.concat("</Sunrise>")); writer.write(myStr.concat("</Sunrise>")); } if (myStr.startsWith("<Noon>") == true) { System.out.println(myStr.concat("</Noon>")); writer.write(myStr.concat("</Noon>")); } if (myStr.startsWith("<sunset>") == true) { System.out.println(myStr.concat("</sunset>")); writer.write(myStr.concat("</sunset>")); } if (myStr.startsWith("<evening>") == true) { System.out.println(myStr.concat("</evening>")); writer.write(myStr.concat("</evening>")); } if (myStr.startsWith("<midnight>") == true) { System.out.println(myStr.concat("</midnight>")); writer.write(myStr.concat("</midnight>")); } if (myStr.startsWith("</Azan") == true) { System.out.println(myStr); writer.write(myStr); } //Create the file if (file.createNewFile()) { System.out.println("File is created!"); } else { System.out.println("File already exists."); } } writer.close(); } catch (IOException e) { e.printStackTrace(); }
--- Update ---
i use this
but i have just last problemwriter.write(myStr+"\n");
If my text consists of 2 words and the between of this word is space, it deletes space when printing, for example, if it is Hello World, it writes HelloWorld in all text file
Re: open text file and edit any line start with name
The code has a list of if statements. Do you ever expect more than one of them to be true at the same time?
If you expect only one if statement to be true, then you should this technique: if/else if/else where the ending else statement would be executed if none of the preceding if statements were true.
The output file should not be created inside of the loop. That would create a new file every time the loop iterates.write all lines in 1 line
If you want all the lines written to a single file, then create the file outside of the loop, write the lines to it inside the loop and close the file after the loop finishes.
If you don't understand my answer, don't ignore it, ask a question.
cnmeysam (March 21st, 2021)
Re: open text file and edit any line start with name
but i have just last problem
If my text consists of 2 words and the between of this word is space, it deletes space when printing, for example, if it is Hello World, it writes HelloWorld This happens to all words in all text file
Re: open text file and edit any line start with name
Please post the current version of the code.
If you don't understand my answer, don't ignore it, ask a question.
cnmeysam (March 21st, 2021)
Re: open text file and edit any line start with name
now it is my cod and work correctly just If my text consists of 2 words and the between of this word is space, it deletes space when printing, for example, if it is Hello World in original text, it writes HelloWorld This happens to all words in new text file for example in original text is
in new file write<Azan ID="1">
<AzanID="1">
File file = new File("oq.txt"); File files = new File("testFile1.txt"); try (Scanner sc = new Scanner(file, StandardCharsets.UTF_8.name())) { FileWriter writer = new FileWriter(files); while (sc.hasNextLine()) { // System.out.println(sc.nextLine()); String myStr = sc.nextLine(); if (myStr.startsWith("<Azan") == true) { System.out.println(myStr); writer.write(myStr+"\n"); } else if (myStr.startsWith("<Day>") == true) { System.out.println(myStr); writer.write(myStr+"\n"); } else if (myStr.startsWith("<Date>") == true) { System.out.println(myStr); writer.write(myStr+"\n"); } else if (myStr.startsWith("<morning>") == true) { // myStr.concat(myStr+"</morning>"); // System.out.println(myStr); System.out.println(myStr.concat("</morning>")); writer.write(myStr.concat("</morning>")+"\n"); } else if (myStr.startsWith("<Sunrise>") == true) { System.out.println(myStr.concat("</Sunrise>")); writer.write(myStr.concat("</Sunrise>")+"\n"); } else if (myStr.startsWith("<Noon>") == true) { System.out.println(myStr.concat("</Noon>")); writer.write(myStr.concat("</Noon>")+"\n"); } else if (myStr.startsWith("<sunset>") == true) { System.out.println(myStr.concat("</sunset>")); writer.write(myStr.concat("</sunset>")+"\n"); } else if (myStr.startsWith("<evening>") == true) { System.out.println(myStr.concat("</evening>")); writer.write(myStr.concat("</evening>")+"\n"); } else if (myStr.startsWith("<midnight>") == true) { System.out.println(myStr.concat("</midnight>")); writer.write(myStr.concat("</midnight>")+"\n"); } else if (myStr.startsWith("</Azan") == true) { System.out.println(myStr); writer.write(myStr+"\n"); } //Create the file else if (file.createNewFile()) { System.out.println("File is created!"); } else { System.out.println("File already exists."); } } writer.close(); } catch (IOException e) { e.printStackTrace(); }
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