What is the Difference between PrintWriter and DataOutputStream?

Question

I\'m working on a chat room application for android. I read different tutorials; some of them use PrintWriter to send data and some of them use DataOutputStream. What is the

Answer 1

Both DataOutputStream and PrintWriter are two classes in java.io.

class DataOutputStream extends FilterOutputStream implements DataOutput {
}

Javadoc says

"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."

 public class PrintWriter extends Writer {
 }

Prints formatted representations of objects to a text-output stream. This class implements all of the print methods found in PrintStream. It does not contain methods for writing raw bytes, for which a program should use unencoded byte streams.