HOW TO WRITE A TEXT FILE?

import java.io.*;
class demo
{
public static void main(String[] args)throws Exception{
File file=new File("hi.txt");
FileWriter fw=new FileWriter(file);
fw.write("hi bhabani");
fw.flush();
fw.close();
}};
import java.io.*;
class demo
{
public static void main(String[] args)throws Exception{
int i;
FileOutputStream fos=new FileOutputStream("hi.txt");
byte[] arr={'a','b','c'};
fos.write(arr);
fos.close();
}};