DataOutputStream class methods in Java

java.io.DataOutputStream

A data output stream lets an application write primitive Java data types to an output stream in a portable way. An application can then use a data input stream to read the data back in.

Some methods of DataOutputStream class

close(): This method closes this output stream and releases any system resources associated with the stream.

flush(): This method flushes this data output stream. This forces any buffered output bytes to be written out to the stream.

size(): This method returns the current value of the counter written, and the number of bytes written to this data output stream so far.

write(byte[]): This method writes b.length bytes to this output stream.

write(int): This method writes the specified byte to the underlying output stream.

write(byte[], int, int): This method writes len bytes from the specified byte array starting at offset off to the underlying output stream.

writeBoolean(boolean): This method writes a boolean to the underlying output stream as a 1-byte value.

writeByte(int): This method writes out a byte to the underlying output stream as a 1-byte value.

writeBytes(String): This method writes out the string to the underlying output stream as a sequence of bytes.

writeChar(int):  This method writes a char to the underlying output stream as a 2-byte value, high byte first.

writeChars(String): This method writes a string to the underlying output stream as a sequence of characters.

writeDouble(double): This method converts the double argument to a long using the doubleToLongBits method in class Double and then writes that long value to the underlying output stream as an 8-byte quantity, high byte first.

writeFloat(float): This method converts the float argument to an int using the floatToIntBits method in class Float and then writes that int value to the underlying output stream as a 4-byte quantity, high byte first.

writeInt(int): This method writes an int to the underlying output stream as four bytes, the high byte first.

writeLong(long): This method writes a long to the underlying output stream as eight bytes, high byte first.

writeShort(int):  This method writes a short to the underlying output stream as two bytes, the high byte first.

writeUTF(String): This method writes a string to the underlying output stream using modified UTF-8 encoding in a machine-independent manner.