Error: unreported exception filenotfoundexception; must be caught or declared to be thrown

Question

Problem :

I want to create a simple program that will output a string to a text file. Below is my code :

import java.io.*;

public class JavaTesting {

public static void main(String[] args) {

File myfile = new File ("myfile.txt");

myfile.getParentFile().mkdirs();

PrintWriter printWriter = new PrintWriter(myfile);

printWriter.println ("Trying to write the txt using Java");

printWriter.close();       

  }

} 

But J-grasp is throwing me the following error:

 ----jGRASP exec: javac -g JavaTesting.java

JavaTesting.java:10: error: unreported exception FileNotFoundException; must be caught or declared to be thrown

PrintWriter printWriter = new PrintWriter(myfile);

                              ^

1 error

 ----jGRASP wedge2: exit code for process is 1.

As I am very new to Java, I am unable to understand the error. Can anybody help me in resolving the error?

Answer 1

This error is occurring because you are not doing the Exception Handling and not telling compiler that there is a chance to throw a FileNotFoundException. In this situation the  FileNotFoundException will be thrown if the file does not exist.

You can refer below code:

public static void main(String[] args) throws FileNotFoundException {

File myfile = new File ("myfile.txt");

myfile.getParentFile().mkdirs();

try

{

PrintWriter printWriter = new PrintWriter(myfile);

printWriter.println ("Trying to write the txt using Java ");

printWriter.close();       

}

catch (FileNotFoundException ex)  

{

//Please insert the code to run when exception occurs

}

}