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Editorial Team
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Asked: 2026-05-26T19:52:04+00:00

RandomAccessFile in = new RandomAccessFile(BOT.grd, r); in.seek(28); double xll=in.readDouble(); The above is the code

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RandomAccessFile in = new RandomAccessFile("BOT.grd", "r");
in.seek(28);
double xll=in.readDouble();

The above is the code i am using to read double data which is present from 29 to 36 byte location.The value present is 500 but i am getting 2.088E-317

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1 Answer

  1. Editorial Team

    It seems this file is stored in a different Endianness than the one java uses. The bytes probably need to be reversed before converting to double, you could try the following code to read the value:

    long   l = in.readLong();
double d = Double.longBitsToDouble(Long.reverseBytes(l));

    Here is an example that illustrates the problem:

    double d = 500.0;

long l1 = Double.doubleToLongBits(d);
long l2 = Long.reverseBytes(l1);

System.out.println(Double.longBitsToDouble(l1));
System.out.println(Double.longBitsToDouble(l2));

    Output:

    500.0
2.088356E-317
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