Multiple choice

import java.io.*; public class MyProgram { public static void main(String args[]) { FileOutputStream out = null; try { out = new FileOutputStream("test.txt"); out.write(122); } catch(IOException io) { System.out.println("IO Error."); } finally { out.close(); } } } and given that all methods of class FileOutputStream, including close(), throw anIOException, which of these is true?

  1. This program will compile successfully.

  2. This program fails to compile due to an error at line 4.

  3. This program fails to compile due to an error at line 6.

  4. This program fails to compile due to an error at line 13.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Any method (in this case, the main() method) that throws a checked exception (in this case, out.close() ) must be called within a try clause, or the method must declare that it throws the exception. Either main() must declare that it throws an exception, or the call to out.close() in the finally block must fall inside a (in this case nested) try-catch block.

Keep practicing — related questions