Compiling java program filenotfoundexception

Question

Having trouble compiling my java file and i think the problem lies here: Problem faced is that i have to include a filenotfoundexception. however, when i add it in, compiler gives me an error of "overridden method does not throw filenotfoundexception" Any idea on how to solve this?

public String getArrival(String flightNumber) {
   Scanner scanner = new Scanner(new File("flights.txt"));
   while(scanner.hasNextLine()){
      String s = scanner.nextLine();
      if(s.indexOf(flightNumber)!=-1){
         String city = s.split("-")[1];
         System.out.println("getArrival(): " + flightNumber + " ==>     Arrival city is " + city);
         return city;
      }
   } 
}

Can you give us the complete error message, and show us this line the compiler is complaining about? — Thomas Stets
– Thomas Stets, Commented Feb 17, 2015 at 6:17

Samik · Accepted Answer · 2015-02-17 03:20:27Z

1

You have to handle the FileNotFoundException yourself using try/catch.

Try this ...

Scanner scanner = null;
    try {
        scanner = new Scanner(new File("flights.txt"));
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }

answered Feb 17, 2015 at 3:20

Samik

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1 Comment

Randyka Yudhistira Over a year ago

"overridden method does not throw filenotfoundexception"

jmcg · Accepted Answer · 2015-02-17 06:13:27Z

I'm not sure what exactly are you doing, but isn't the error quite self-explanatory? "overridden method does not throw filenotfoundexception" error will show if you are trying to catch something that is not being thrown by any code in your try clause.

try{
    callMethodThatDoesNotThrowAnException();

} catch (FileNotFoundException e){
   // if your try clause does not throw any FileNotFoundException, 
   // then this clause will NEVER be executed. 
}

On the contrary, if you have a method that throws a FileNotFoundException, then you can catch it:

    try{
        callMethodThatThrowsFileNotFoundException ();

    } catch (FileNotFoundException e){
       // the exception thrown by the method will be caught here 
    }

private void callMethodThatThrowsFileNotFoundException() throws FileNotFoundException{
    throw new FileNotFoundException ("File not found");
}

hope this helps.

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