Create or Write/Append in Text File

Create or write/append in text file

Try something like this:

 $txt = "user id date";
$myfile = file_put_contents('logs.txt', $txt.PHP_EOL , FILE_APPEND | LOCK_EX);

How to append text to an existing file in Java?

Are you doing this for logging purposes? If so there are several libraries for this. Two of the most popular are Log4j and Logback.

Java 7+

For a one-time task, the Files class makes this easy:

try {
Files.write(Paths.get("myfile.txt"), "the text".getBytes(), StandardOpenOption.APPEND);
}catch (IOException e) {
//exception handling left as an exercise for the reader
}

Careful: The above approach will throw a NoSuchFileException if the file does not already exist. It also does not append a newline automatically (which you often want when appending to a text file). Another approach is to pass both CREATE and APPEND options, which will create the file first if it doesn't already exist:

private void write(final String s) throws IOException {
Files.writeString(
Path.of(System.getProperty("java.io.tmpdir"), "filename.txt"),
s + System.lineSeparator(),
CREATE, APPEND
);
}

However, if you will be writing to the same file many times, the above snippets must open and close the file on the disk many times, which is a slow operation. In this case, a BufferedWriter is faster:

try(FileWriter fw = new FileWriter("myfile.txt", true);
BufferedWriter bw = new BufferedWriter(fw);
PrintWriter out = new PrintWriter(bw))
{
out.println("the text");
//more code
out.println("more text");
//more code
} catch (IOException e) {
//exception handling left as an exercise for the reader
}

Notes:

  • The second parameter to the FileWriter constructor will tell it to append to the file, rather than writing a new file. (If the file does not exist, it will be created.)
  • Using a BufferedWriter is recommended for an expensive writer (such as FileWriter).
  • Using a PrintWriter gives you access to println syntax that you're probably used to from System.out.
  • But the BufferedWriter and PrintWriter wrappers are not strictly necessary.


Older Java

try {
PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("myfile.txt", true)));
out.println("the text");
out.close();
} catch (IOException e) {
//exception handling left as an exercise for the reader
}


Exception Handling

If you need robust exception handling for older Java, it gets very verbose:

FileWriter fw = null;
BufferedWriter bw = null;
PrintWriter out = null;
try {
fw = new FileWriter("myfile.txt", true);
bw = new BufferedWriter(fw);
out = new PrintWriter(bw);
out.println("the text");
out.close();
} catch (IOException e) {
//exception handling left as an exercise for the reader
}
finally {
try {
if(out != null)
out.close();
} catch (IOException e) {
//exception handling left as an exercise for the reader
}
try {
if(bw != null)
bw.close();
} catch (IOException e) {
//exception handling left as an exercise for the reader
}
try {
if(fw != null)
fw.close();
} catch (IOException e) {
//exception handling left as an exercise for the reader
}
}

Writing to a new file if it doesn't exist, and appending to a file if it does

It's not clear to me exactly where the high-score that you're interested in is stored, but the code below should be what you need to check if the file exists and append to it if desired. I prefer this method to the "try/except".

import os
player = 'bob'

filename = player+'.txt'

if os.path.exists(filename):
append_write = 'a' # append if already exists
else:
append_write = 'w' # make a new file if not

highscore = open(filename,append_write)
highscore.write("Username: " + player + '\n')
highscore.close()

Writing a new and appending a file in PHP without erasing contents

Simply:

file_put_contents($filename,$songName.$newLine,FILE_APPEND);

Takes care of opening, writing to, and closing the file. It will even create the file if needed! (see docs)

If your new lines aren't working, the issue is with your $newLine variable, not the file append operations. One of the following will work:

$newLine = PHP_EOL;  << or >>  $newLine = "\r\n";

JavaScript: Writing & appending text files from After Effects

To append the file it needs to pass the append mode...

reportFile.open("a");

How do I append to a file?

Set the mode in open() to "a" (append) instead of "w" (write):

with open("test.txt", "a") as myfile:
myfile.write("appended text")

The documentation lists all the available modes.

How do I append text to a file with python?

For Append File:

with open("newfile.txt", "a+") as file:
file.write("I am adding in more lines\n")
file.write("And more…")

For Read File:

with open('newfile.txt') as f:
lines = f.readlines()
print(lines)

unable to write and append the text file android

after long work finally i found your solution, just implement below code it will help you..

 public static void writefile(String text  )
{
File externalStorageDir = new File (Environment.getExternalStorageDirectory().getAbsolutePath() + "/Download/eyedebug/" );
String fileName= System.currentTimeMillis() + ".txt" ;

boolean statement = externalStorageDir.exists() && externalStorageDir.isDirectory();
if(!statement) {
// do something here
externalStorageDir.mkdirs();
System.out.println("file 1");
}


File myFile = new File(externalStorageDir.getAbsolutePath() , fileName );
if(!myFile.exists()){
try {
myFile.createNewFile();
System.out.println("file 2");
}
catch (IOException e)
{
e.printStackTrace();
}
}

try
{
FileWriter fileWritter = new FileWriter(myFile,true);
BufferedWriter bufferWritter = new BufferedWriter(fileWritter);
bufferWritter.append(text);
bufferWritter.newLine();
System.out.println("file 3");
bufferWritter.close();
}
catch (IOException e)
{
e.printStackTrace();
}



}


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