Re: Exception handling and assigning final member variables
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
exception
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;
Or
p = parseIntegerWithDefault(input, 1);
static int parseIntegerWithDefault(String str, int defVal)
{
try
{
return Integer.parseInt(str);
}
catch (Exception ex)
{
return defVal;
}
}
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