Java Save Text to File Example

A demo file on the desktop named 'gfg.txt' is used for reference as a local directory on the machine. Creating an empty file before writing a program and give that specific path of that file to the program.

Methods:

1. Using writeString() method of Files class
2. Using write() method of Files class
3. Using writer() method of Filewriter class
4. Using write() method of Bufferedwriter class
5. Using write() method of PrintWriter class

Let us discuss every method individually by implementing the same via clean java programs to get a fair idea of working on them.

Method 1: Using writeString() method of Files class

The writeString() method of File Class in Java is used to write contents to the specified file. 'java.nio.file.Files' class is having a predefined writeString() method which is used to write all content to a file, using the UTF-8 charset.

Syntax:

Files.writeString(path, string, options)

Parameters:

• Path: File path with data type as Path
• String: A specified string that will enter in the file with a return type string.
• Options: Different options to enter the string in the file. Like append the string to the file, overwrite everything in the file with the current string, etc

Return Value: This method does not return any value.

Procedure:

• Create an instance of the file.
• Call the Files.writeString() method with an instance, string and characters set.

Example

Java

import java.io.*;

import java.io.IOException;

import java.nio.charset.StandardCharsets;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

public class GFG {

public static void main(String[] args)

{

Path path

= Paths.get( "C:\\Users\\HP\\Desktop\\gfg.txt" );

String str

= "Geeks for Geeks \nWelcome to computer science portal \nHello Geek" ;

try {

Files.writeString(path, str,

StandardCharsets.UTF_8);

}

catch (IOException ex) {

System.out.print( "Invalid Path" );

}

}

}

Output:

Geeks for Geeks Welcome to computer science portal Hello Geek

Method 2: Using write() method of Files class

java.nio.file.Files class is having a predefined write() method which is used to write a specified text to the file.

Procedure:

1. Create an instance of the file.
2. Convert the string into a byte array by using string.getBytes() method.
3. Lastly call method namely Files.write() with file instance and the byte array.

Example

Java

import java.io.*;

import java.io.IOException;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

public class GFG {

public static void main(String[] args)

{

Path path

= Paths.get( "C:\\Users\\HP\\Desktop\\gfg.txt" );

String str

= "Geeks for Geeks \nWelcome to computer science portal \nHello Geek!" ;

byte [] arr = str.getBytes();

try {

Files.write(path, arr);

}

catch (IOException ex) {

System.out.print( "Invalid Path" );

}

}

}

Output:

Geeks for Geeks Welcome to computer science portal Hello Geek!

Method 3: Using writer() method of FileWriter class

Filewriter class is used to write some data on file. This is a simple way of writing the data on file.

Procedure:

• Create an instance of the file.
• Passing the file instance into filewriter.
• Now call writer() method over a filewriter with string data.
• Flush the file resource.
• Close the file resource.

Example

Java

import java.io.*;

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

public class GFG

{

public static void main(String[] args) throws IOException

{

File path = new File( "C:\\Users\\HP\\Desktop\\gfg.txt" );

FileWriter wr = new FileWriter(path);

wr.write( "Geeks for Geeks \nWelcome to computer science portal \nHello Geek!!" );

wr.flush();

wr.close();

}

}

Output:

Geeks for Geeks Welcome to computer science portal Hello Geek!!

Method 4: Using write() method of BufferedWriter class

BufferedWriter class basically provides a buffer for writing instance. We can wrap some other writers like PrintWriter and FileWriter into BufferedWriter. BufferedWriter is very efficient for doing multiple write operations on file & writing multiple files. BufferedWriter is very efficient than Filewriter.

Procedure:

1. Create an instance of the file.
2. Declare the stream with filewriter.
3. Call write() method on stream with string data.

Example

Java

import java.io.*;

import java.io.IOException;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

public class GFG {

public static void main(String[] args)

{

Path path

= Paths.get( "C:\\Users\\HP\\Desktop\\gfg.txt" );

String str

= "Geeks for Geeks \nWelcome to computer science portal \nHello Geek!" ;

byte [] arr = str.getBytes();

try {

Files.write(path, arr);

}

catch (IOException ex) {

System.out.print( "Invalid Path" );

}

}

}

Output:

Geeks for Geeks Welcome to computer science portal Hello Geek!!!

Method 5: Using write() method of PrintWriter class

PrintWriter class is an extension of writer class. PrintWriter class is used to write the string data on file using the write() method.

Procedure:

1. Create an instance of the file.
2. Create a stream of PrintWriter and pass the file instance into it.
3. Call the write method with data.
4. Flush the stream.
5. Close the stream.

Example

Java

import java.io.*;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.PrintWriter;

public class GFG {

public static void main(String[] args)

throws FileNotFoundException

{

File path

= new File( "C:\\Users\\HP\\Desktop\\gfg.txt" );

PrintWriter pw = new PrintWriter(path);

pw.write(

"Geeks for Geeks \nWelcome to computer science portal \nHello Geek!!!!" );

pw.flush();

pw.close();

}

}

Output:

Geeks for Geeks Welcome to computer science portal Hello Geek!!!!

whittemorealed1977.blogspot.com

Source: https://www.geeksforgeeks.org/java-program-to-save-a-string-to-a-file/

Share this post