java - Regex to test if a string ends with a number -

i'd test if string ends a digit. expect following java line print true. why print false?

system.out.println("i end number 4".matches("\\d$")); 

your regex not match entire string last part. try below code , should work fine matches entire string.

system.out.println("i end number 4".matches("^.+?\\d$")); 

you can test quick check on online regex testers one: http://www.regexplanet.com/simple/index.html. gives should use in java code in results appropriate escapes.

the .+ ensure there atleast 1 character before digit. ? ensure lazy match instead of greedy match.