Number Parsing in Squirrel
Here’s the translated code and explanation in Markdown format suitable for Hugo:
Parsing numbers from strings is a basic but common task in many programs; here’s how to do it in Java.
The Integer
, Long
, Float
, and Double
classes provide number parsing functionality in Java.
To run the program:
In Java, we use the wrapper classes (Integer
, Long
, Float
, Double
) to parse strings into their respective number types. These classes provide static methods like parseInt()
, parseLong()
, parseFloat()
, and parseDouble()
.
Unlike in some other languages, Java doesn’t require specifying the bit size for parsing, as the types have fixed sizes (e.g., int
is always 32 bits, long
is always 64 bits).
For parsing hexadecimal numbers, we can use the parseInt()
or parseLong()
method with a radix of 16.
Java doesn’t have a direct equivalent to Go’s Atoi()
, but Integer.parseInt()
serves the same purpose for parsing base-10 integers.
When parsing fails due to invalid input, Java throws a NumberFormatException
instead of returning an error value.
Next, we’ll look at another common parsing task: URLs.