PrintStream Class

Constructors

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintStream;

class Address
{
	int houseNo;
	int stno;
	String area;

	Address(int h,int s,String ar)
	{
		houseNo=h; stno=s; area=ar;
	}
public String toString()
	{
		return "House no="+houseNo+" Street no.="+stno+" Area="+area;

	}
}
public class PrintStreamClass 
 {
	public static void main(String[] args) throws FileNotFoundException,IOException 
	{
					//Writing In File
	FileOutputStream fos=new FileOutputStream("EmpData.txt");
	PrintStream ps=new PrintStream(fos);
	
	String EmpName="Sandeep Kumar";
	float salary=5000000;//
	
	System.out.println("Writing Employee Name...");
	ps.println("Employee Name:"+EmpName);//writing string
	System.out.println("Writing Employee Salary...");
	ps.println("Salary:"+salary);//writing float
	
	Address adr=new Address(20877, 18, "Ajit Road");
	System.out.println("Writing Employee Address...");
	ps.println("Employee Address:"+adr);// writing object

	fos.close();
	ps.close();
	System.out.println("Writing Process Completed....");
				// Reading from file (line by line)
	BufferedReader rdr=new BufferedReader(new FileReader("EmpData.txt"));
	String line;
	System.out.println("Reading Started...");
	while((line=rdr.readLine())!=null)
	{
		System.out.println(line);
	}
	rdr.close();
	System.out.println("Reading Finished....");
	}
}
            

   OUTPUT
      Writing Employee Name...
      Writing Employee Salary...
      Writing Employee Address...
      Writing Process Completed....
      Reading Started...
      Employee Name:Sandeep Kumar
      Salary:5000000.0
      Employee Address:House no=20877 Street no.=18 Area=Ajit Road
      Reading Finished....
            

Buffered Writer Class

Constructors

Buffered Reader Class

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;

public class BufferedReaderWriter 
{
static void writeToFile()
	{
		try
		{
			//Input Data from User
			BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
			System.out.print("Enter Your Name:");
			String s = br.readLine();
			System.out.print("Enter Your Address:");
			String a = br.readLine();
			System.out.print("Enter Your College/Company Name:");
			String cc = br.readLine();
			// Write the above in file
			BufferedWriter bufw=new BufferedWriter(new FileWriter("urdata.txt",true));
			bufw.write("Name:"+s);
			bufw.newLine();
			bufw.write("Address:"+a);
			bufw.newLine();
			bufw.write("College/Company:"+cc);
			bufw.newLine();
			bufw.flush();//clear the buffer
			bufw.close();//must be closed
			System.out.println("Writing Process Completed.......");
		
		}
		catch(Exception ex){ex.printStackTrace();}
		
	}
static void readFromFile()
	{
	try{
			BufferedReader rdr=new BufferedReader(new FileReader("urData.txt"));
			String line;
			System.out.println("\nReading Data From File...");
			while((line=rdr.readLine())!=null)
			{
				System.out.println(line);
			}
			rdr.close();
			System.out.println("Reading Finished....");
		}
	catch(IOException ex){ ex.printStackTrace();}
	
	}
	public static void main(String[] args)
	{
	writeToFile();
	readFromFile();

	}

}
                

    OUTPUT
     Enter Your Name:Rajesh Bansal
     Enter Your Address:Ajit Road
     Enter Your College/Company Name:BCE & SST
     Writing Process Completed.......
     Reading Data From File...
     Reading Started...
     Employee Name:Sandeep Kumar
     Salary:5000000.0
     Employee Address:House no=20877 Street no.=18 Area=Ajit Road
     Reading Finished....