Thread: what is the right class to write into text file in a specific line (the end of the text file) ?

Originally Posted by Norm

Some of the output classes have a special boolean parameter in their constructor for appending to a file.

Can you give me one that its constructor gets OutputStreamWriter and have this appending ?

Originally Posted by Norm

I don't know which one it is. You have to Look at the API doc for the output files:
http://docs.oracle.com/javase/8/docs/api/index.html

sorry, I havent been at the computer lately.
i tried some IO with append function not work.

this is the permission of the file text on the FTP its ok ?

	rw-r--r--

i try also with FTPClient appendFile and appendFileStream not work either.
i saw somthing maybe will helps (but its for local text fil)

FileWriter fw = new FileWriter(filename,true);

can you help me ?

Originally Posted by Norm

Yes, that looks like the constructor that can be used when you want to append to a file instead of rewriting it.

This has nothing to do with FTP commands. This is for local files.

so, do you have idea for my problem ?

Originally Posted by Norm

Is your problem with using FTP?

I don't know much about FTP.

thank for helping so far.
i have question about exec (probably simple one):

Runtime runtime = Runtime.getRuntime();
					try {
						runtime.exec("C:/Program Files (x86)/qBittorrent/qBittorrent.exe");
						System.out.println("Dear Admin: we have opened another window for you for admin commands");
					} catch(Exception e) {
						e.printStackTrace();
					}

when i put software (that im not write) its work and call the program.
but, if i try on somthing that i write (on java) it dosent, why ?

runtime.exec("C:/Program Files (x86)/qBittorrent/a.exe"); 
//a.exe its jar converted by Launch4j (work if i click the program 100%).

Originally Posted by Norm

Please post the complete code that can be compiled and executed for testing.

Make sure your code reads and prints the streams returned by the process - normal and error.

String adminlist = "ftp://user:pass@host/ss/adminlist.txt";
				if(searchTxtFTP(adminlist, serial)) {
					Runtime runtime = Runtime.getRuntime();
					try {
						runtime.exec("C:/a.exe");
						System.out.println("Dear Admin: we have opened another window for you for admin commands");
					} catch(Exception e) {
						e.printStackTrace();
					}	
				}
				//end #3
 
 
//#searchTxtFTP associated #1 + #2
	public static boolean searchTxtFTP(String userPassHostDirectoryTxtfile, String stringTxt) {
 
		boolean found = false;
		String line = null;
 
		try {
 
			URL url = new URL(userPassHostDirectoryTxtfile);
			URLConnection con = url.openConnection();
			BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
 
			while ((line = in.readLine()) != null) {
 
				if(line.contains(stringTxt)) {
					found = true;
					break;
				}
			}
 
			in.close();
		} catch(Exception e) {
			e.printStackTrace();
		}
		return found;
 
	}//end #searchTxtFTP

no errors: and even this line printed: Dear Admin: we have opened another window for you for admin commands

Client. -=[created by doronbachar]=-
 
[disk mac found]: 0025_385B_71B1_26B3
Dear Admin: we have opened another window for you for admin commands
screenshot has been taken
your folder is located
the image is uploaded successfully
The file was successfully deleted from your computer

a.exe

also work 100% separately

Originally Posted by Norm

The Runtime exec method returns a Process object that has streams the show the normal and error output from the process.
You need to get references to those streams to read from and print out what they contain so you can see if there are any errors.

like that ?

Process process = runtime.exec("C:/a.exe");
System.out.println(process);

if yes its return:
java.lang.ProcessImpl@1b6d3586

--- Update ---

i also now check in the task mangaer i saw a.exe its work when i run the program, but i cant see its opened why ?

Originally Posted by Norm

That is not what I was talking about.
Read the API doc for the Process class to find what methods to call to get the streams that the process writes to. Your code must read and print what those streams contain so you can see if there were any errors.

Oh, stream got it, when i be near to my pc, i will send to you

Originally Posted by Norm

Sorry, I do not understand your question.

when i do the program without swing, its mixed the main program and the program that called from exec together.
i try to do simple swing (jbutton) just for trying and main program and the program that called from exec separately as they should be.

so im asking if you know way to avoid swing ? (i dont know swing) that main program and the program that called from exec separately.
if you dont know away i let the client to do manually click (for open th another program)

Originally Posted by Norm

Do you mean a GUI when you say swing?
Are you trying to write a program that reads/writes in a command prompt instead of using a GUI?

For a java program to use a command prompt, the user must open the command prompt first and then execute the java program there.

yes i meant i never used GUI (haha i learn java a week or 2 ago, dont really care about this GUI) i just write a code and when im done i use blue4j to convert to exe (from jar).

but i try exec to java GUI program and its open, when the program not usu GUI (even its exe) java mix the main program and the program from exec (that not using GUI in exe).

Originally Posted by Norm

If the java program uses GUI then it will open a window for input however it is executed allowing user interaction.
If the java program only uses the console, then the user must open a comand prompt window to enter data into the program and see what it prints out.
On Windows, using a batch file (.bat) to execute the java program will open a command prompt window allowing user interaction.

Another option would be to use the JOPtionPane class. I will present a small window and get input without a swing GUI.

ok

about my original question how add text in remote text on FTP:
after struggles its work now, maybe its will help others(i learn simple regex for this hh)
and read beforce i write (for saving manually the old text, append fuction not working well i try so so many... so its do it yourself kind a thing):

URL urlR = new URL(banlist);
                    URLConnection conR = urlR.openConnection();
                    BufferedReader inR = new BufferedReader(new InputStreamReader(conR.getInputStream()));
 
                    String copyBanList = ""; //empty string
 
 
                    while ( (line = inR.readLine()) != null ) copyBanList += "\n" +  line.trim(); //after read line(with trim), do new line
 
                    inR.close();
 
                    if(!targetIsAdmin && !targetInBan) {
                        URL urlW = new URL(banlist);
                        URLConnection conW = urlW.openConnection();
                        BufferedWriter outW = new BufferedWriter(new OutputStreamWriter(conW.getOutputStream()));    
 
                        //add into copyBanList new line if i'ts not the first one
                        outW.write((copyBanList + "\n" +  mac.replaceAll("\n+", "\n")).replaceAll("^\n+", "")); 
                        outW.flush();
                        outW.close();
                        System.out.println("NOTICE: you have added the client" + " " + mac + " " +  "to the banlist");
                    } else if(targetIsAdmin && !targetInBan) System.out.println("EROR: you can't give ban to admin!");
                    else System.out.println("EROR: the target:" + " " + mac + " " +  "is already on ban list");