Answers for "read and write file in java"

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

java write to file

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 fw = new FileWriter("C:/path/to/filename.txt");
      fw.write("this is how u write a string");
	  fw.write(String.valueOf(108)); // cast number to string
      myWriter.close();
    } catch (IOException e) {
        ..
    }
  }
}

Posted by: Guest on June-14-2021

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);
}

Posted by: Guest on April-09-2020

Source

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();

Posted by: Guest on April-26-2021

Source

How do you write or read data from or to file with Java?

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

Posted by: Guest on May-28-2021

creating file in java

package FileHandling;
 
 // Import the File class
import java.io.File;
 
// Import the IOException class to handle errors
import java.io.IOException; 
 
public class CreateFile {
public static void main(String[] args) {
try {
// Creating an object of a file
File myObj = new File("D:FileHandlingNewFilef1.txt"); 
if (myObj.createNewFile()) {
System.out.println("File created: " + myObj.getName());
} else {
System.out.println("File already exists.");
}
} catch (IOException e) {
System.out.println("An error occurred.");
e.printStackTrace();
}
}
}

Posted by: Guest on September-22-2020

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