Streets in Greece have the format Street 123 and I need a Java Regex to match it. The regex I came up with looks correct to me, it's not working though and I am not really an expert on regex. Someone suggested that Java's regex maybe different than Javascripts,and I am not an expert on them either,so can anyone help? I just need a word,followed by 1 whitespace,followed by a 3digit number(max). So for example it should match

• Street 123
• Street 1
• Street 12

but not match Street123,Street1234,Street 1234

Here's my regex:

ADDRESS_REGEX = "[A-Za-z] \\s[0-9]{3} ";

CodePudding user response：

To match a 1-3 digits and a single space:

\b[A-Za-z] \h\d{1,3}\b

• \b A word boundary
• [A-Za-z] Match 1 chars A-Za-z
• \h Match a horizontal whitspace character
• \d{1,3} Match 1-3 digits
• \b A word boundary

See a regex demo

In Java

String regex = "\\b[A-Za-z] \\h\\d{1,3}\\b";

CodePudding user response：

This version is correct:

^[A-Za-z] \\s[0-9]{1,3}$