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(Java Create and Write To Files) How to create a file in Java?
To create a file in Java, you can use the createNewFile() method.
This method returns a boolean value: true if the file was successfully created, and false if the file already exists.
(Java Create and Write To Files) the createNewFile() method is enclosed in a try...catch block.
This is necessary because it throws an IOException if an error occurs (if the file cannot be created for some reason)
Example:
(Java Create and Write To Files) Example:
import java.io.File;
import java.io.IOException;

public class CreateFile {
public static void main(String[] args) {
try {
File myObj = new File("filename.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();
}
}
}
File created: filename.txt
(Java Create and Write To Files) How to create a file in a specific directory?
To create a file in a specific directory (requires permission), specify the path of the file and use double backslashes to escape the "\" character (for Windows).
(Java Create and Write To Files) Write To a File.
In the following example, we use the FileWriter class together with its write() method to write some text to the file we created in the example above.
Note that when you are done writing to the file, you should close it with the close() method.
(Java Create and Write To Files) Example
import java.io.FileWriter;
import java.io.IOException;

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();
}
}
}
Successfully wrote to the file.
(Java Read Files) Read a File
In the previous chapter, you learned how to create and write to a file.
In the following example, we use the Scanner class to read the contents of the text file we created in the previous chapter