DataOutputStream
In this chapter you will learn:
Use DataOutputStream
DataOutputStream enables you to write primitive data to a stream.
DataOutputStream implements the DataOutput interface.
DataOutput interface defines methods that convert
primitive values to a sequence of bytes.
DataOutputStream makes it easy to store binary data,
such as integers or floating-point values, in a file.
DataOutputStream extends FilterOutputStream,
which extends OutputStream.
DataOutputStream defines the following constructor:
DataOutputStream(OutputStream outputStream)
outputStream specifies the output stream to which data will be written.
DataOutput defines methods that convert values of a primitive type into a byte
sequence and then writes it to the underlying stream.
Write primitive data to a file
DataOutputStream has methods for us to save value in primitive type
into a file.
import java.io.DataOutputStream;
import java.io.FileOutputStream;
// ja v a2 s . c o m
public class Main {
public static void main(String args[]) throws Exception {
FileOutputStream fos = new FileOutputStream("c:/a.txt");
DataOutputStream dos = new DataOutputStream(fos);
dos.writeShort(1);
dos.writeBytes("java2s.com");
dos.writeChar('a');
dos.writeBoolean(true);
fos.close();
}
}
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What you will learn in the next chapter: