Question

import java.io.*;
class demo
{
public static void main(String args[])
{
    PrintWriter pw=new PrintWriter(System.out);
    pw.println("java");
    //pw.print("java");
}
}

// the output is java using pw.println but output is null using pw.print i.e nothing gets printed on console while using print.

Answer 1

Try this instead :

PrintWriter pw=new PrintWriter(System.out);
pw.print("java");
pw.flush();

The PrintWriter is going to be doing internal buffering, and the println method is automatically flushing it.