There are situations when we need to write a string to a file. Common example is for creating logs, if we are not using any logging framework. There are various ways of doing this. Below are listed some common methods.
Jakob Jenkov Last update: FileWriter makes it possible to write characters to a file. The FileWriter is intended to write text, in other words. One character may correspond to one or more bytes, depending on the character encoding scheme in use. The proper exception handling has been skipped here for the sake of clarity.
The FileWriter has other constructors too, letting you specify the file to write to in different ways.
Look in the official JavaDoc for more detailed info. Appending the File When you create a Java FileWriter you can decide if you want to overwrite any existing file with the same name, or if you want to append to any existing file.
You decide that by choosing what FileWriter constructor you use. The FileWriter constructor taking just one parameter, the file name, will overwrite any existing file: The file name and a boolean.
The boolean indicates whether to append or overwrite an existing file. Here are two Java FileWriter examples showing that: This may not always be what you want, and you cannot change it!
If you want to specify a different character encoding scheme, don't use a FileWriter. The OutputStreamWriter lets you specify the character encoding scheme to use when writing bytes to the underlying file.
Closing a FileWriter is done by calling its close method. Here is how closing a Java FileWriter looks: Here is how to use and close a FileWriter looks with the try-with-resources construct: The try-with-resources construct takes care of that.In Java Programming, the BufferedWriter class writes text to a character-output stream, buffering characters so as to provide for the efficient writing of single characters, arrays and strings.
OK, I Understand. Program: How to write string content to a file in java? Below example shows how write string content to a local file. When you are dealing with characters, you need to use Writer.
Write to File. To write some content in a file in Java programming, first you have to ask to the user to enter the file name with extension to open it and then write some content inside the file. We have learnt to write content to file in Kotlin using standard Java function and also using Kotlin extension functions to rutadeltambor.com: printWriter(), bufferedWriter(), writeText().
Documentation for these extension functions could be found here. A buffer is a collective memory. Reader and Writer classes in java supports "Text Streaming". The "BufferedWriter" class of java supports writing a chain of characters output stream (Text based) in an efficient way.
The Chain-Of-Characters can be Arrays, Strings etc.