can anyone help me with this Java exercise. it would be better if the code is no

Question

can anyone help me with this Java exercise. it would be better if the code is not complex, just basic stuff. Im starting java and I really want to understand it.

Create a class called FileConverter. In the class, create an instance method called convertFile() that reads in the datafile and writes it to a new file in the following format:

james:1165 Street: miami:fl

dane:1234 Another Street:miami:fl so this info is in a textfile called input.txt

so it reads this info from the text file called input.txt and writes it in a new text file named hm_new_output.txt in this new format

james|1165 Street| miami,fl

dane|1234 Another Street|miami,fl

Explanation / Answer

import java.io.*;

public class FileConverter {
public static void main(String args[]) throws IOException
{
FileInputStream in = null;
FileOutputStream out = null;
  

try {
in = new FileInputStream("input.txt");
out = new FileOutputStream("output.txt");

BufferedReader br = new BufferedReader(new FileReader(file))
   String line;
   while ((line = br.readLine()) != null) {
           int lastIndex = line.lastIndexOf(':');
           line = line.substring(0,lastIndex - 1) + "," + line.substring(lastIndex + 1);
           line = line.replace(':','|');
           out.write(line + " ");
       }

}finally {
if (in != null) {
in.close();
}
if (out != null) {
out.close();
}
}
}
}

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