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I want to convert a c++ (opencv) method to java (jaavcv) method

I'm worrying about this line . Is the conversion correct?

 float label=atof(entryPath.filename().c_str());

 --> float label=Float.parseFloat(child.getName());
Andrea
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nawara
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  • If child.getName() will have string value which can be converted to float as it it then this is correct. http://stackoverflow.com/questions/7552660/java-convert-float-to-string-and-string-to-float – HVar Oct 25 '13 at 11:35
  • Note, however, that this may throw an exception. – Ingo Oct 25 '13 at 11:36

2 Answers2

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Yes ,You are on track

float label = Float.parseFloat(child.getName());

where child.getName() is string and in valid float format

If you want it back

String floToStr= Float.toString(label );

Update:

If you check docs,

That method parseFloat

Returns a new float initialized to the value represented by the specified String, as performed by the valueOf method of class Float.

Throws:
NullPointerException - if the string is null
NumberFormatException - if the string does not contain a parsable float.
Suresh Atta
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    For example :`suresh` is not a valid float value :) – Suresh Atta Oct 25 '13 at 11:39
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    valid float format is .5, 0.5, 1.5, 23.56233, and i think 1.4582e14 so normal notation, notation without the leading zero if there is one and scientific notation – LionC Oct 25 '13 at 11:41
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If child.getName() returns well-formatted String (for example 1.5) then yes, it's correct.

float label = Float.parseFloat(child.getName());

If child.getName() doesn't return parsable float (for example 1,5), parseFloat() will throw NumberFormatException.

Adam Stelmaszczyk
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