Thread: new line in file writing

package javaapplication25;
import java.io.*;
import java.awt.*;
import java.awt.event.*;

public class Emails extends WindowAdapter implements ActionListener
{
Frame f;
TextField t1,t2;
Button b; Label l1,l2;
String s1,s2;
String s3="f";
String s4="hello@gmail.com";
String s5,s6;
String s7="00";
String s8=",";
FileOutputStream fos;
File f1;
String path,name;
int count=0;
public Emails()
{

f=new Frame();
f.setSize(400,400);
f.setLayout(new GridBagLayout());
b=new Button("Create");
b.addActionListener(this);
l1=new Label("Year");
l2=new Label("No Of Emails");
t1=new TextField();
t2=new TextField();
GridBagConstraints gbc=new GridBagConstraints();
gbc.gridx=0;gbc.gridy=0;
gbc.gridwidth=2;gbc.gridheight=2;
gbc.ipadx=4;gbc.ipady=6;
gbc.fill=GridBagConstraints.HORIZONTAL;
gbc.anchor=GridBagConstraints.NORTH;
gbc.weightx=1.0;gbc.weighty=1.0;
Insets i=new Insets(30,5,7,9);
f.add(l1,gbc);
gbc.gridx=2;
f.add(t1,gbc);
gbc.insets=i;
gbc.gridy=2;
gbc.gridx=0;
f.add(l2,gbc);
gbc.gridx=2;
f.add(t2,gbc);
Insets i2=new Insets(30,5,7,9);
gbc.insets=i2;
gbc.gridy=5;
gbc.gridx=2;
f.add(b,gbc);
f.addWindowListener(this);
f.setVisible(true);



}

public void actionPerformed(ActionEvent e)
{
try

{
String str=e.getActionCommand();
if(str.equals("Create"))
{

BufferedWriter bw=null;
path="D:/";
name="email.txt";
s1=t1.getText();
s2=t2.getText();
int a=Integer.parseInt(s2);


f1=new File(path,name);
if(f1.exists())
f1.delete();
fos = new FileOutputStream(f1);
for(int i=0;i<a;i++)
{
count= count+1;
/*if(count>9)
{
String c1=count+"";
String s9="0";
s5=s3+s1+s9+c1+s4+s8;
byte c[] = s5.getBytes();
fos.write(c);
}*/
s6=count+"";

s5=s3+s1+s7+s6+s4+s8;
byte c[] = s5.getBytes();
fos.write(c);


}

}
}
catch(IOException ef)
{

}
}

public void windowClosing(WindowEvent e2)
{
Window w=e2.getWindow();
w.setVisible(false);
w.dispose();
System.exit(1);
}


public static void main(String[] args)
{
Emails e=new Emails();
}

}

this code will out put the text in a text file in one continuous line .. but i want to do that,, it will produce the output one line at a time ..how to do that plz help..

like this
f2011001hello@gmail.com
f2011002hello@gmail.com

not like

f2011001hello@gmail.com,f2011001hello@gmail.com

package javaapplication25;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
 
public class Emails extends WindowAdapter implements ActionListener
{
Frame f;
TextField t1,t2;
Button b; Label l1,l2;
String s1,s2;
String s3="f";
String s4="hello@gmail.com";
String s5,s6;
String s7="00";
String s8=",";
FileOutputStream fos;
File f1;
String path,name;
int count=0;
public Emails()
{
 
f=new Frame();
f.setSize(400,400);
f.setLayout(new GridBagLayout());
b=new Button("Create");
b.addActionListener(this);
l1=new Label("Year");
l2=new Label("No Of Emails");
t1=new TextField();
t2=new TextField();
GridBagConstraints gbc=new GridBagConstraints();
gbc.gridx=0;gbc.gridy=0;
gbc.gridwidth=2;gbc.gridheight=2;
gbc.ipadx=4;gbc.ipady=6;
gbc.fill=GridBagConstraints.HORIZONTAL;
gbc.anchor=GridBagConstraints.NORTH;
gbc.weightx=1.0;gbc.weighty=1.0;
Insets i=new Insets(30,5,7,9);
f.add(l1,gbc);
gbc.gridx=2;
f.add(t1,gbc);
gbc.insets=i;
gbc.gridy=2;
gbc.gridx=0;
f.add(l2,gbc);
gbc.gridx=2;
f.add(t2,gbc);
Insets i2=new Insets(30,5,7,9);
gbc.insets=i2;
gbc.gridy=5;
gbc.gridx=2;
f.add(b,gbc);
f.addWindowListener(this);
f.setVisible(true);
 
 
 
}
 
public void actionPerformed(ActionEvent e)
{
try
 
{
String str=e.getActionCommand();
if(str.equals("Create"))
{
 
BufferedWriter bw=null;
path="D:/";
name="email.txt";
s1=t1.getText();
s2=t2.getText();
int a=Integer.parseInt(s2);
 
 
f1=new File(path,name);
if(f1.exists())
f1.delete();
fos = new FileOutputStream(f1);
for(int i=0;i<a;i++)
{
count= count+1;
/*if(count>9)
{
String c1=count+"";
String s9="0";
s5=s3+s1+s9+c1+s4+s8;
byte c[] = s5.getBytes();
fos.write(c);
}*/
s6=count+"";
 
s5=s3+s1+s7+s6+s4+s8;
byte c[] = s5.getBytes();
fos.write(c);
 
 
}
 
}
}
catch(IOException ef)
{
 
}
}
 
public void windowClosing(WindowEvent e2)
{
Window w=e2.getWindow();
w.setVisible(false);
w.dispose();
System.exit(1);
}
 
 
public static void main(String[] args)
{
Emails e=new Emails();
}
 
}

this code will out put the text in a text file in one continuous line .. but i want to do that,, it will produce the output one line at a time ..how to do that plz help..

like this
f2011001hello@gmail.com
f2011002hello@gmail.com

not like

f2011001hello@gmail.com,f2011001hello@gmail.com

Add on a newline character ("\n") where you want the end of the line to be.

Well, although Norm's solution will usually work, it is generally better to use a static variable retrieved from System.getProperty('line.separator"), to be technically more robust.

An example of creating the String

This is the first line and
this is the second line

could be done in one method like

{
  String newLine = System.getProperty("line.separator");
  String str = "This is the first line and" + newLine + "this is the second line.";
}

Or for a class (A little faster)

public class Example
{
  private static final String newLine = System.getProperty("line.separator");
 
  public String exMethod()
  {
     return "This is the first line and" + newLine + "this is the second line.";
  }
}

thnx buddy got that