Re: Exception handling and assigning final member variables

"Mike Schilling" <>
Sat, 23 Aug 2008 00:35:31 -0700
Joshua Cranmer wrote:

Robert wrote:

I have a class which needs to take a string as input in its
constructor. I want to parse the string into constant member
variables, but this does not appear to work due to the way
handling is interpreted. Essentially, we have:

public class Foo {
  public Foo(String input) {
   try {
      p = Integer.parseInt(input);
    } catch(Exception e) {
      p = 1;
  private final int p;

Try this:

public Foo(String input) {
  int pValue;
  try {
   pValue = Integer.parseInt(input);
  } catch (Exception e) {
   pValue = 1;
  p = pValue;

Alternatively, you could do this:

p = isValidInput(input) ? Integer.parseInt(input) : 1;


    p = parseIntegerWithDefault(input, 1);

    static int parseIntegerWithDefault(String str, int defVal)
            return Integer.parseInt(str);
        catch (Exception ex)
            return defVal;

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