copy 1 to 100 numbeer from file one and paste to others has some error

import java.io.*;
class demo
{
	public static void main(String args[])throws IOException
	{	String inputFile = "C:\\Users\\USER\\Desktop\\java code\\helo.txt";
		String outputFile = "C:\\Users\\USER\\Desktop\\java code\\he.txt";
		FileInputStream f = new FileInputStream("C:\\Users\\USER\\Desktop\\java code\\helo.txt");
		
		DataOutputStream bao = new DataOutputStream(new FileOutputStream(outputFile));
		DataInputStream bai = new DataInputStream(new FileInputStream(inputFile));
		int size = bai.available();
		int i;
		while((i=bai.read())!=-1)
		{
			bao.write(i);
		}
		 bai.close();
            bai = new DataInputStream(new FileInputStream(inputFile)); // Reopen for resetting
            while (bai.available() > 0) {
                int data = bai.readInt();
                if (data % 2 == 0) {
                    bao.writeInt(data);
                }
            }
		
		bai.close();
		bao.close();
	}
}