Determine a number from text string

Question

I want determine number from specify string.

Ex: I have many text strings, such as "3.2p" or "3.2px" or "xp3.2" or "p3.2x".

The final result I want is can get number from text in above. Expected result "3.2".

People who know,

Please help me,

Thanks,

replace all "x"s and all "p"s with "" – Phantômaxx Jun 12 '14 at 09:57 — Phantômaxx, Jun 12 '14 at 09:57

score 1 · Accepted Answer · answered Jun 12 '14 at 10:04

1

I would first remove all the non-numeric characters using a regex, then parse what remains.

String str = input.replaceAll("[^\\d.]", "");

Float.parseFloat(str);

answered Jun 12 '14 at 10:04

starf

score 1 · Answer 2 · answered Jun 12 '14 at 10:04

1

Use this:

String s = "ffffa32.334tccy";
s = s.replaceAll("[^\\d.]", "");

answered Jun 12 '14 at 10:04

Robi Kumar Tomar

shouldn't you be escaping the "." ? – TheLostMind Jun 12 '14 at 10:05
@TheLostMind We are using "." as the meta-character, not the literal decimal point. We want the decimal point to remain. – starf Jun 12 '14 at 10:10
@TheLostMind, It should only remove the English alphabet from a string. – Robi Kumar Tomar Jun 12 '14 at 10:15

2 Answers2