Java Write Files

To write data in character form to a file, utilize the Java FileWriter class found in the java.io package. Character-oriented data can be written to a file using the Java FileWriter class. It is a character-oriented class that is used for file handling in java.

Example:

public class fileCreate{
  public static void main (String[] args){

     // Get the current working directory (user.dir)
      String currentDir = System.getProperty("user.dir");

     // Create a file with path using Java code
     String filePath = currentDir + "/createNewFiles.txt";

  try {
      File createFile=new File(filePath);
      if(createFile.createNewFile())
         System.out.println("File created "+createFile.getName());	
       else
         System.out.println("File already exist");
   }
  catch(IOException e){
    System.out.println("Error")    
   }
  }//main
}//class

Output:

There are multiple ways to write a text file in Java. this is required while dealing with many applications. There are several ways to write a plain text file in Java, e.g., you can use FileWriter or BufferedWriter to write a text file.

File write using FileWriter:

1. The simplest method for writing a file in Java is FileWriter. To write an int, byte array, or string to a file, it offers an overloaded write method. With FileWriter, you may also write a portion of a String or byte array. FileWriter should only be used when there are fewer writes because it writes straight into files.

Example:

//write file using fileWriter
import java.io.FileWriter;
import java.io.IOException;
public class fileWriter{
   public static void main (String[] args){
     try {
        FileWriter myWriter = new FileWriter("createNewFilesss.txt");
        myWriter.write("File create & wrote Successfully ");
        myWriter.close();
     } 
     catch (IOException e) {
         System.out.println("An error occurred.");
          e.printStackTrace();
     }
  }//main
}//class

Output:

File write using BufferedWriter:

Example 1:

public class fileWriter{
   public static void main (String[] args){

        // Content to be assigned to a file
         String text = "Computer Science Portal DumbSchools";

        // Try block to check if exception occurs
       try {
              // Get the current working directory (user.dir)
              String currentDir = System.getProperty("user.dir");

             // File path of the file to read
              String filePath = currentDir + "/fileWriter.txt";
 
             // Create a FileWriter object
             // to write in the file
            FileWriter fWriter = new FileWriter( filePath);              
 
            // Writing into file
            // Note: The content taken above inside the
            // string
            fWriter.write(text);
 
            // Printing the contents of a file
            System.out.println(text);
 
            // Closing the file writing connection
            fWriter.close();
 
            // Display message for successful execution of
            // program on the console
            System.out.println("File is created successfully with the content.");  
        } 
            // Catch block to handle if exception occurs
      catch (IOException e) { 
            // Print the exception
             System.out.print(e.getMessage());
      }
  }//main
}//class

Output:

public class filWriter{
  public static void main (String[] args){

    // Content to be assigned to a file

    String text = "Computer Science Portal DumbSchool";
   
   // Try block to check if exception occurs
  try {	 
      // Create a FileWriter object
      // to write in the file
      FileWriter fWriter = new FileWriter( "C:\\Java\\workspace\\file_IO/fileWriter.txt");
         
      // Writing into file
      // Note: The content taken above inside the
      // string
            fWriter.write(text);
 
            // Printing the contents of a file
            System.out.println(text);
 
            // Closing the file writing connection
            fWriter.close();

            // Display message for successful execution of
           // program on the console
            System.out.println( "File is created successfully ");     
    } 
  // Catch block to handle if exception occurs
     catch (IOException e) {
            // Print the exception
       System.out.print(e.getMessage());
     }
  }//main
}//class

Output: