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/* Write double to a file using DataOutputStream This Java example shows how to write a Java double primitive value to a file using writeDouble method of Java DataOutputStream class. */ import java.io.DataOutputStream; import java.io.FileOutputStream; import java.io.IOException; public class WriteDoubleToFile { public static void main(String[] args) { String strFilePath = "C://FileIO//WriteDouble.txt"; try { //create FileOutputStream object FileOutputStream fos = new FileOutputStream(strFilePath); /* * To create DataOutputStream object from FileOutputStream use, * DataOutputStream(OutputStream os) constructor. * */ DataOutputStream dos = new DataOutputStream(fos); double d = 165; /* * To write a double value to a file, use * void writeDouble(double d) method of Java DataOutputStream class. * * This method writes specified double to output stream as 8 bytes value. * Please note that the double value is first converted to long using * Double.doubleToLongBits method and then long is written to * underlying output stream. */ dos.writeDouble(d); /* * To close DataOutputStream use, * void close() method. * */ dos.close(); } catch (IOException e) { System.out.println("IOException : " + e); } } } |
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