Splitting string in java containing relational operators

Question

Let's say I have a string which has relational operators:

"x<y , x=y , x<=y , x>y , x>=y"

How can I split this?

If I use [<>=] it'll split x<=y as (x and =y).

Is there any simple way to do it without writing our own function to split?

Guillaume · Accepted Answer · 2013-04-30 13:06:29Z

up vote 6 down vote accepted

If you want to split using any sequence of characters (and not only any character), then you should use:

[<>=]+

The + here means 1 or more

answered Apr 30 at 13:06

Guillaume
7,27711033

what + here means? (we would give "<+" for 1..* < but this one?) – Dineshkumar Apr 30 at 13:55

@Dineshkumar, you should be aware that the above pattern will also match things like <<, >>, =<, =>, and ==. – MetaFight Apr 30 at 17:04

1

More precisely, [<>]=?|= – kevin cline Apr 30 at 18:29

Enrique Medina · Answer 2 · 2013-04-30 13:10:46Z

up vote 0 down vote

You could have a Recursive Descent Parser. Is easy to implement and easy to mantain. You might want to look this.

answered Apr 30 at 13:10

Enrique Medina
213

True but this is a scanning problem, not a parsing problem (yet). Not an answer. – EJP Apr 30 at 23:58

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