java write to file code example

Example 1: writing to a file in java

import java.io.FileWriter;   // Import the FileWriter class
import java.io.IOException;  // Import the IOException class to handle errors

public class WriteToFile {
  public static void main(String[] args) {
    try {
      FileWriter myWriter = new FileWriter("filename.txt");
      myWriter.write("Files in Java might be tricky, but it is fun enough!");
      myWriter.close();
      System.out.println("Successfully wrote to the file.");
    } catch (IOException e) {
      System.out.println("An error occurred.");
      e.printStackTrace();
    }
  }
}

Example 2: java create txt file

File myObj = new File("path");
myObj.createNewFile();
FileWriter myWriter = new FileWriter("path");
myWriter.write("text");
myWriter.close();

Example 3: java read text file

// java read text file example code
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
public class JavaReadTextFileUsingBufferedReader
{
   public static void main(String[] args) throws IOException
   {
      File fl = new File("B:\\demo.txt");
      BufferedReader br = new BufferedReader(new FileReader(fl));
      String str;
      while((str = br.readLine()) != null)
      {
         System.out.println(str);
      }
      br.close();
   }
}

Example 4: write file java

@Test
public void givenUsingJava7_whenWritingToFile_thenCorrect() 
  throws IOException {
    String str = "Hello";
 
    Path path = Paths.get(fileName);
    byte[] strToBytes = str.getBytes();
 
    Files.write(path, strToBytes);
 
    String read = Files.readAllLines(path).get(0);
    assertEquals(str, read);
}

Example 5: java write to file

PrintWriter writer = new PrintWriter("the-file-name.txt", "UTF-8");
writer.println("The first line");
writer.println("The second line");
writer.close();

Example 6: write file from a specific location in java

File file = new File("Z:\\results\\results.txt");