Want to save the number -9999 into a binary file
Hello:
I have this function in which I save different numbers (integers or doubles) into a binary file (with another extension) but when i tried to convert -9999 into bytes and then save it in the file ; it saves -9960 not -9999 as it should. I do not know why.
This is my function:
/*********************************************************************/
public static void createFile(Double [][] Grid, String txtOutputFile, String[] gridInfoFile){
Integer[][] intGrid = null ;
File file = new File(Utils.ChangeFileExt(txtOutputFile, ".myExt"));
try {
FileOutputStream file_out = new FileOutputStream(file);
DataOutputStream data_out = new DataOutputStream(file_out);
if(gridInfoFile[0].equalsIgnoreCase("1") || gridInfoFile[0].equalsIgnoreCase("1.0")){
intGrid = doubleToIntArray(Grid);
}
for(int i = 0; i < Grid.length; i++){
for(int j = 0; j < Grid[0].length; j++){
if(gridInfoFile[0].equalsIgnoreCase("1") || gridInfoFile[0].equalsIgnoreCase("1.0")){
Byte byte1, byte2;
byte1 = new Integer (intGrid[j] / 256).byteValue();
byte2 = new Integer(intGrid[j] - (intGrid[j] / 256)).byteValue();
data_out.write(byte2);
data_out.write(byte1);
}
if(gridInfoFile[0].equalsIgnoreCase("2") || gridInfoFile[0].equalsIgnoreCase("2.0")){
ByteArrayOutputStream byte_out = new ByteArrayOutputStream ();
DataOutputStream data_out2 = new DataOutputStream (byte_out);
data_out2.writeFloat(Grid[j].floatValue());
byte[] bArray = byte_out.toByteArray();
data_out.write(bArray[3]);
data_out.write(bArray[2]);
data_out.write(bArray[1]);
data_out.write(bArray[0]);
}
}
}//fin for
data_out.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
/********************************************/
I had already tried data_out.writeFloat, write, writeInt, etc without any success.
If someone knows the answer , please let me know, will appreciate that. Thank you for your help
magnasound
