Java PrintStream class

PrintStream class :

• The PrintStream class is obtained from the FilterOutputstream class that implements a number of methods for displaying textual representations of Java primitive data types. 
• Unlike other output streams, a PrintStream never throws an IOException and the data is flushed to a file automatically i.e. the flush() method is automatically invoked after a byte array is written.
• The constructor of the PrintStream class is written as:

                PrintStream (java.io.OutputStream out);  

Create a new print stream The print( ) and println( ) methods of this class give the same functionality as the method of standard output stream.

Simple java program that prints hello world:

import java.io.PrintStream;
class Example
{
	public static void main(String[] args) 
{
		PrintStream ps=new PrintStream(System.out);
		ps.println("Hello World!");
	}
}

Writing data on to the File:

import java.io.*;
public class PrintStreamDemo 
{
	public static void main(String[] args) 
{
		try 
{
			FileOutputStream out = new FileOutputStream("out.txt");
			PrintStream p = new PrintStream(out);
			p.println("this text will be written into out.txt after run");
			System.out.println("text has been written, go and check out.txt in the current directory");
			p.close();
		} catch (Exception e) {}
	}
}