HELP: String to double conversion?

Hello,
I want to convert a String to a double, and then use this double for a calculation. The conversion seems to be ok, but I get an error with the calculation... Please HELP!
A part of my code:
double angle;
Double converted_angle;
angle=jTextField2.getText();
converted_angle= Double.valueOf(angle);
double theta = cos(Math.PI/180*converted_angle);
ERROR: "operator * cannot be applied to double,java.lang.Double"
Thanks in advance.

This is happening because you want to multiply a Double object, instead of a double value. Do this:
Double converted_angle; should be double converted_angle;
converted_angle= Double.valueOf(angle); should be changed to converted_angle = Double.parseDouble(angle);
angle should probably be a String.
check this link for your options:
http://java.sun.com/j2se/1.4/docs/api/java/lang/Double.html

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I want to convert a string to a double on my Real Time device (PXI-8101. When I use the "scan value" or "Fract/Exp String To Number Function" VI the numbers after comma dissapear. This does not happen on the Host (PC).
So for example on the host vi, the string "2121,3" gives the number 2121,3. If I do the same thing on the Real Time, the string "2121,3" returns the number 2121.
How can I fix this?
Thanks in advance,
Regards,
Dries
Solved!
Go to Solution.
Attachments:
String2Number.vi ‏7 KB

Hello,
Thanks for the reply, but scan from string also does not return the correct number on the RT device. The VI returns the number after comma as the remaining string. Any other suggestions?
Best regards,
Dries
Attachments:
String2Number.vi ‏8 KB

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Kinda urgent please help pass strings to doubles and strings to ints

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cupofjava666 wrote:
Need to know how to pass strings to doubles and strings to ints
and to check if a string is null its just if (name == null;) which means black right?
like size as a string and then make the string size a doubleThink he means blank.
Check the Wrapper classes (Double, Integer) in the api.
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Then study this tutorial
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the point being there are 2 delimiters to split, the first being the comma the second being the line break thus creating an array of single digits
I have solved the issue by using replaceall to replace all commas with spaces and then split on the spaceStill makes no sense. A line break doesn't not contain spaces. So how does replacing commas with spaces allow you to split on the line break.
If you are appending each line to a string (to build one long string) then append the data with a comma, not a space.
I really get the idea you guys are not enjoying my code?Its your requirements we don't understand. You obviously aren't explaining them correctly.

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Dear Friends,
Problem with String to Int conversion
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Refresh
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View Display Error
_ Odbc driver returned an error (SQLExecDirectW)._
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Refresh
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Edited by: Musnet on Jun 29, 2010 5:42 AM
Edited by: Musnet on Jun 29, 2010 6:48 AM

Dear Kart,
This give me another hint, Yes you are right. There was one row which returns neither blank nor any value.
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Regards
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HELP: String to double conversion?

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