PrintStreamDemo.java

package printstreamdemo;

import java.io.*;

class Student
{
    int rollno;
    String name;
    String dept;
}

public class PrintStreamDemo 
{
    
    /**
	 * 
	 * @param args
	 * @throws Exception
	 * Student1.txt is a file upon that FileOutputStream is attached. And upon that PrintStream attach. So the 'ps' is an object of stream.
	 * So, whatever I write inside the stream object will go in the FileOutputStream and that will go into Student1.txt file.
	 */
    
    public static void main(String[] args) throws Exception
    {
        FileOutputStream fos=new FileOutputStream("C:\\MyJava\\Student1.txt");
        PrintStream ps=new PrintStream(fos);
        
        
        Student s=new Student();
        s.rollno=10;
        s.name="John";
        s.dept="CSE";
        
         // For write it in PrintStream. So, that it will go into the stu.txt file.
        ps.println(s.rollno);
        ps.println(s.name);
        ps.println(s.dept);    // OUTPUT -> Remember it has return three Strings [ 10, John, CSE ] 
        
        ps.close();
        fos.close();
        
    }    
}