Using FileReader causes a compiler error “unhandled exception type FileNotFoundException”

Question

Ive read a few threads here that relate the same problem, but the solutions arent working. :/

I use Eclipse, here is my program.

package mypackage;
         


        

Answer 1

I see that you tried to specify the full path to your file, but failed because of the following mistake:

you haven't declared or tried to catch java.io.FileNotFoundException.

To fix it, you can replace the line

FileReader fr = new FileReader("myscript.abc");

with the code:

try {
    FileReader fr = 
    new FileReader("/home/jason/workspace/myproject/src/mypackage/myscript.abc");
} catch (FileNotFoundException ex) {
    Logger.getLogger(myclass.class.getName()).log(Level.SEVERE, null, ex);
}

The following code is successfully compiled, and it should work:

package mypackage;
import java.io.*;
// It's better to use Camel style name for class name, for example: MyClass.
// In such a way it'll be easier to distinguish class name from variable name.
// This is common practice in Java.
public class myclass {

    public static void main(String[] args) {
        String myfile = 
            "/home/jason/workspace/myproject/src/mypackage/myscript.abc";

        File file1 = new File(myfile);
        if (file1.exists()) {
            log("File " + myfile + " exists. length : " + myfile.length());
        } else {
            log("File " + myfile + " does not exist!");
        }

        try {
            FileReader fr = new FileReader(myfile);
        } catch (FileNotFoundException ex) {
            // Do something with mistake or ignore
            ex.printStackTrace();
        }

        log("\nAbsPath : " + new File(".").getAbsolutePath());
        log("\nuser.dir : " + System.getProperty("user.dir"));
    }

    public static void log(String s) {
        System.out.println(s);
    }
}