Java OCA OCP Practice Question 3053

Question

Which one of the following code snippets shows the correct usage of try-with-resources statement? 

a)  public static void main(String []files) {
        try (FileReader inputFile
                = new FileReader(new File(files[0]))) {
                    //...
        }//  w ww. j  av a2 s. co  m
        catch(IOException ioe) {}
    }

b)  public static void main(String []files) {
        try (FileReader inputFile
                = new FileReader(new File(files[0]))) {
                    //...
        }
        finally { }
        catch(IOException ioe) {}
    }

c)  public static void main(String []files) {
        try (FileReader inputFile
                = new FileReader(new File(files[0]))) {
                    //...
        }
        catch(IOException ioe) {}
        finally { inputFile.close(); }
    }

d)  public static void main(String []files) {
        try (FileReader inputFile
                = new FileReader(new File(files[0]))) {
                    //...
        }
    }



a)

Note

option b) provides finally before the catch block, it will result in a compiler error.

option c) uses the variable inputFile in the statement inputFile.close() that is not accessible in the finally block and hence results in a compiler error.

option d) the required catch block in this context is missing in the code (because the try block code may throw IOException), and hence it is incorrect usage.




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