Example of Reading the data of current java file and writing it into another file.

import java.io.*;

class Asignment11
{
public static void main(String surat[])throws Exception
{

FileInputStream fin=new FileInputStream("mahi.txt");
FileOutputStream fout=new FileOutputStream("bhavna.txt");

int i=0;

while((i=fin.read())!=-1)
{
fout.write((byte)i);
}

fin.close();
}
}

Output: