how to write a double to a file in java

[Gaurav]

Hello,

I am trying to figure out how to write double values to a file in
java.

I tried using RandomAccessFile writeDouble but when i look in the file
i see all junk...

what is the correct way of writing doubles to a file so i can read
them .

thank you,
Gaurav

 

[Chris Smith]

I am trying to figure out how to write double values to a file in
java.

I tried using RandomAccessFile writeDouble but when i look in the file
i see all junk...

what is the correct way of writing doubles to a file so i can read
them .

You need to be more precise about what you want. Do you want doubles in
text format? If so, convert your doubles to String first --
String.valueOf(myDouble) -- and then write them to a text stream in a
known text encoding (such as ASCII or UTF-8) with Writer.write.
Something like:

FileOutputStream stream = new FileOutputStream("myfile.txt");
OutputStreamWriter out = new OutputStreamWriter(stream, "US-ASCII");
out.write(String.valueOf(myDouble));

--
www.designacourse.com
The Easiest Way to Train Anyone... Anywhere.

Chris Smith - Lead Software Developer/Technical Trainer
MindIQ Corporation

 

[VisionSet]

Hello,

I am trying to figure out how to write double values to a file in
java.

I tried using RandomAccessFile writeDouble but when i look in the file
i see all junk...

what is the correct way of writing doubles to a file so i can read
them .

Works okay for me:

try{

RandomAccessFile raf = new RandomAccessFile("RafTest","rw");

raf.writeDouble(12.34);

raf.close();

raf = new RandomAccessFile("RafTest","r");

double dub = raf.readDouble();

System.out.println(dub);
}

catch(Exception e) {
e.printStackTrace();
}

 

[Roedy Green]

I am trying to figure out how to write double values to a file in
java.

I tried using RandomAccessFile writeDouble but when i look in the file
i see all junk...

that is what you are supposed to see, unreadable binary.

See http://mindprod.com/fileio.html

 

[sheetalmalhotra]

writing double values to text file

Hii everybody...
I want to create an output file and then write a point of double values into a text file using java.
eg: (2.00,1.11)

Is there a way to do that. Please let me know.

Thanks.