Convert short[] to float[]

Hi, I'm trying to convert a short[] to a float[]. The following code works fine, but when I try to convert between arrays I get "cannot resolve symbol" error. Can anyone tell me the cause of this error? Thanks.
short s=2;
float f;
f = new Float(s).floatValue(); //works fine
short[] shortArray;
float[] floatArray;
floatArray = new Float(shortArray).floatValue(); //gets error

Firstly don't use new AnyClass() to do conversions between primatives, it creates object unneccassaily. You can cast primative types from one value to another.
Don't use float unless you really need to. double is just as fast and more accurate. The amount of memory you will save will be worth less than 1 cent. (most of the time)
    public static double[] convertToDoubleArray(short[] shortArray) {
        double[] ret = new double[shortArray.length];
        for (int j = 0; j < shortArray.length; j++)
            ret[j] = shortArray[j];
        return ret;
    }

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Convert string to floating-point

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..very basic question, but I tryed it for hours and only received short-dumps
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hi
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Converting Byte [] into float []

Hi, I read the contents of a file into a byte array and am now trying to convert it into a float array.
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ultiron wrote:
I'm pretty sure they do. The way im doing it is by taking 2 byte values and changing them to a 16 bit float.
the way the bytes are shift they should only take up 16 bits.It's not that simple.
First, a float in Java is always 4 bytes. The fact that it has an integer value that can fit into two bytes is irrelevant
Second, floating point representation is not the same 2s complement that's used for byte, short, int, and long, so you're not just shifting the bits.
For eample:
1, int: 00000000 00000000 00000000 00000001
1, float: 00111111 10000000 00000000 00000000
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-1, float: 10111111 10000000 00000000 00000000Having said that, you're casting, so your step of going from short to float is correct. It doesn't just shift; it does conversions like the above. The caveats are:
1) Is your conversion from bytes to short correct? That depends on what those bytes are supposed to be. If they're big-endian representations of 2-byte, 2s-complement numbers, then your code looks correct. You'll still have to test it of course. You'll want to focus on corner cases.
00 00 --> 0
00 01 --> 1
10 00 --> 4096
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80 00 --> -32768
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See this API
[Java2SE Float|http://download-llnw.oracle.com/javase/6/docs/api/java/lang/Float.html#valueOf%28java.lang.String%29]
Note that trailing format specifiers, specifiers that determine the type of a floating-point literal (1.0f is a float value; 1.0d is a double value), do not influence the results of this method. In other words, the numerical value of the input string is converted directly to the target floating-point type. In general, the two-step sequence of conversions, string to double followed by double to float, is not equivalent to converting a string directly to float. For example, if first converted to an intermediate double and then to float, the string
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Our teacher tells us always to use int and double. But what if I don't need such precision or large values?
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You don't save any memory if you use floats instead of doubles in a method. These variables only exist on the stack when the method is executing. Also remember that Java may do type conversions from float to double in expressions. This may make your code slower.
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Go to Solution.

Appears to be right, but don't forget to round to the nearest integer.
http://zone.ni.com/reference/en-XX/help/371361H-01/glang/round_to_nearest/
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Something like this ...
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[email protected] wrote:
Hi altenbach
The data is come from flowmeter by MODBUS.
Thanks
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Convert short[] to float[]

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