NOTE: From Java 7, you can use try-with-resources statement to simplify the code of opening and closing the reader/writer. While ((character = reader.read()) != -1) This program writes some Unicode string (Vietnamese) to the specified text file.
#How to wreite .txt file on mac how to#
* This program demonstrates how to read characters from a text file.įileReader reader = new FileReader("MyFile.txt") Java Reading from Text File ExampleThe following small program reads every single character from the file MyFile.txt and prints all the characters to the output console: package New FileOutputStream("YourFile.txt"), "UTF-8") īufferedWriter bufWriter = new BufferedWriter(writer) Now, let’s look at some complete examples. New FileInputStream("MyFile.txt"), "UTF-16") īufferedReader bufReader = new BufferedReader(reader) And for a BufferedWriter example: OutputStreamWriter writer = new OutputStreamWriter( New FileOutputStream("YourFile.txt"), "UTF-8") In case we want to use a BufferedReader, just wrap the InputStreamReader inside, for example: InputStreamReader reader = new InputStreamReader( New FileInputStream("MyFile.txt"), "UTF-16") That creates a new reader with the Unicode character encoding UTF-16.And the following statement constructs a writer with the UTF-8 encoding: OutputStreamWriter writer = new OutputStreamWriter( For example: InputStreamReader reader = new InputStreamReader( Cp1252 on Windows): FileReader reader = new FileReader("MyFile.txt") įileWriter writer = new FileWriter("YourFile.txt") So if we want to use a specific charset, use an InputStreamReader or OutputStreamWriter instead. Character Encoding and CharsetWhen constructing a reader or writer object, the default character encoding of the operating system is used (e.g. BufferedWriter writes text to a character stream with efficiency (characters, arrays and strings are buffered to avoid frequently writing to the underlying stream) and provides a convenient method for writing a line separator: newLine().The following diagram show relationship of these writer classes in the java.io package: 3. FileWriter is a convenient class for writing text files using the default character encoding of the operating system. The charset can be default character encoding of the operating system, or can be specified explicitly when creating an OutputStreamWriter.
Characters are encoded into bytes using a specified charset. OutputStreamWriter is a bridge from byte streams to character streams. write(char): writes an array of characters.It implements the following fundamental methods: Writer is the abstract class for writing character streams. Writer, OutputStreamWriter, FileWriter and BufferedWriter BufferedReader reads text from a character stream with efficiency (characters are buffered to avoid frequently reading from the underlying stream) and provides a convenient method for reading a line of text readLine().The following diagram show relationship of these reader classes in the java.io package: 2.
FileReader is a convenient class for reading text files using the default character encoding of the operating system. The charset can be default character encoding of the operating system, or can be specified explicitly when creating an InputStreamReader. It converts bytes into characters using a specified charset. InputStreamReader is a bridge from byte streams to character streams.
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