I am using Java and I need to validate a numeric sequence like this: 9999/9999.
I tried using this regex \\d{4}\\\\d{4}, but I am getting false for matches().
My code:
Pattern regex = Pattern.compile("\\d{4}\\\\d{4}");
if (!regex.matcher(mySequence).matches()) {
System.out.println("invalid");
} else {
System.out.println("valid");
}
Can anyone help me, please?
Pattern regex = Pattern.compile("\\d{4}\\\\d{4}");
should be
Pattern regex = Pattern.compile("\\d{4}/\\d{4}");
The regex pattern is attempting to match a backslash rather than a forward slash character. You need to use:
Pattern regex = Pattern.compile("\\d{4}/\\d{4}")
Change your pattern to :
Pattern regex = Pattern.compile("\\d{4}\\\\\\d{4}");
for matching "9999\\9999" (actual value: 9999\9999) (in java you need to escape while declaring String)
or if you want to match "9999/9999" then above solutions would work fine:
Pattern regex = Pattern.compile("\\d{4}/\\d{4}");
