Java - create and write file
In this article, we would like to show you how to create and write files in Java.
There are several methods to create and write files in Java:
Files.newBufferedWriter(Java 8)Files.write(Java 7)FileOutputStream(Java 7)File.createNewFilePrintWriter
In this example, we use Files.newBufferedWriter() method to create a new example.txt file and write some text inside it. If the file already exists, the content will be overwritten.
xxxxxxxxxximport java.io.BufferedWriter;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 Example { public static void main(String[] args) { String filename = "C:\\path\\example.txt"; Path path = Paths.get(filename); // create and write to the example.txt file try (BufferedWriter writer = Files.newBufferedWriter(path, StandardCharsets.UTF_8)) { writer.write("Dirask is the best!"); } catch (IOException e) { e.printStackTrace(); } }}Result:
In this example, we use Files.write() method to create a new example.txt file and write some text inside it. If the file already exists, the content will be overwritten.
xxxxxxxxxximport java.io.IOException;import java.nio.charset.StandardCharsets;import java.nio.file.Files;import java.nio.file.Paths;public class Example { public static void main(String[] args) { String filename = "C:\\path\\example.txt"; String text = "Dirask is the best!"; // create and write to the example.txt file try { Files.write( Paths.get(filename), text.getBytes(StandardCharsets.UTF_8)); } catch (IOException e) { e.printStackTrace(); } }}Result:
In this example, we use FileOutputStream to create a new example.txt file and write some text inside it. If the file already exists, the content will be overwritten.
xxxxxxxxxximport java.io.*;public class Example { public static void main(String[] args) { // create and write to the example.txt file try { OutputStream file = new FileOutputStream("C:\\path\\example.txt"); String text = "Dirask is the best!"; // converts string into byte array byte b[] = text.getBytes(); file.write(b); file.close(); System.out.println("File write ended successfully."); } catch (IOException e) { e.printStackTrace(); } }}The File.createNewFile() method returns:
true- if the file doesn't exist and was created successfully,false- if the file is already exists
In this example, we use File.createNewFile method to create a new example.txt file and FileWriter to write some text inside it. If the file exists, the FileWriter will overwrite the content.
xxxxxxxxxximport java.io.File;import java.io.FileWriter;import java.io.IOException;public class Example { public static void main(String[] args) { String filename = "C:\\path\\example.txt"; // create example.txt file try { File file = new File(filename); if (file.createNewFile()) { System.out.println("File created successfully!"); } else { System.out.println("File already exists."); } // write to file try (FileWriter writer = new FileWriter(file)) { writer.write("Dirask is the best!"); } } catch (IOException e) { e.printStackTrace(); } }}Output:
xxxxxxxxxxFile created successfully!Result:
In this example, we use PrintWriter class to create a new example.txt file and write some text inside it. If the file already exists, the content will be overwritten.
xxxxxxxxxximport java.io.IOException;import java.io.PrintWriter;import java.nio.charset.StandardCharsets;public class Example { public static void main(String[] args) { String filename = "C:\\path\\example.txt"; String text = "Dirask is the best!"; // create and write to the example.txt file try (PrintWriter writer = new PrintWriter(filename, StandardCharsets.UTF_8)) { writer.println("line 1"); writer.println("line 2"); writer.println("line 3"); } catch (IOException e) { e.printStackTrace(); } }}Result:
