Java string to double conversion.
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Published on 2010-06-01T14:19:32Z
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2010/06/01
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Hi,
I've been reading up on the net about the issues with handling float
and double
types in java. Unfortunately, the image is still not clear. Hence, i'm asking here direct. :(
My MySQL
table has various DECIMAL(m,d)
columns. The m
may range from 5 to 30. d
stays a constant at 2.
Question 1.
What equivalent data-type should i be using in Java to work (i.e store, retrieve, and process) with the size of the values in my table? (I've settled with double - hence this post).
Question 2.
While trying to parse a double from a string, i'm getting errors
Double dpu = new Double(dpuField.getText());
for example -
"1" -> java.lang.NumberFormatException: empty String
"10" -> 1.0
"101" -> 10.0
"101." -> 101.0
"101.1" -> 101.0
"101.19" -> 101.1
What am i doing wrong? What is the correct way to convert a string to a double value? And what measures should i take to perform operations on such values?
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