Changing java doubles to floats in eclipse

Question

Do you know any way to easily change every double to float in a source file in eclipse (java)? I.e. how do I change

double a = 123.45

to

float a = 123.45f

I figured out the renaming double to float bit (whoa!), but how to add the f's without having to go through it manually?

[Dublicated](http://stackoverflow.com/questions/916081/convert-float-to-double-without-losing-precision)? — Gerret, Aug 27 '13 at 13:34
Find and replace dialog accepts Regex.. so it can be done with Regex — sanbhat, Aug 27 '13 at 13:37

Marko Topolnik · Accepted Answer · 2013-08-28T11:51:57.770

6

A regular expression-based search and replace might save you. Search for

double\s+(\w+)\s*=\s*([\-\d.e]+)\s*;

and replace with

float $1 = $2f;

This will take care of literals; you may also wish to replace other kinds of expressions, adding a cast operator. Once you are done with literals, use a similar regex:

double\s+(\w+)\s*=\s*(.+)\s*;

and replace with

float $1 = (float) $2;

Definitely far from foolproof, but it may save you a lot of time.

edited Aug 28 '13 at 11:51

answered Aug 27 '13 at 13:38

Marko Topolnik

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+1 I tested and it works with slight modification `double\s(\w+)\s=\s(.+?);` – sanbhat Aug 27 '13 at 13:43
this won't work in this case `double a= myclass.getDoubleValue()` – Philipp Sander Aug 27 '13 at 13:45
You are right, but it can be fixed with a similar regex after the literals are fixed first. – Marko Topolnik Aug 28 '13 at 05:47

score 0 · Answer 2 · answered Aug 27 '13 at 13:36

0

Float.parseFloat(String.valueOf(123.45D)); Hehe

answered Aug 27 '13 at 13:36

Sw4Tish

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score -1 · Answer 3 · answered Aug 27 '13 at 13:39

-1

You can cast it

Double d = 1.0
float f = (float)d

answered Aug 27 '13 at 13:39

Maciej Cygan

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Changing java doubles to floats in eclipse

3 Answers3