write data to a file in java

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();
    }
  }
}

Posted by: Guest on April-22-2020

@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); }

Read data: I can use classes bufferedReader and bufferwriter. Lets say I have a text in Java. I use bufferedReader to read the files if it is a random file bufferedReader is only the functionality to read a file. For, Excel files I use the special library, Apache POI library. These are external libraries. I use properties class to read the properties files. Scanner class also for read the data from files

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