why this code does not execute

//java CopyFile aage.txt boxdemo.txt
import java.io.*;
class copyfile
{
    
    public static void main(String args[])throws IOException
    {
        int i;
        FileInputStream fin=null;
        FileOutputStream fout=null;
        try
        {
            fin=new FileInputStream(args[0]);
        }
        catch(FileNotFoundException e)
        {
            System.out.println("Input file not found");
        return;
        }
        //open output file
        try
        {
            fout=new FileOutputStream(args[1]);
        }
        catch(FileNotFoundException e)
        {
            System.out.println("Erroe opening output file");
            return;
        }
        catch(ArrayIndexOutOfBoundsException e)
        {
            System.out.println("Usage:copyfile from to");
            return;
        }
        //copy file
        try
        {
            do
            {
                i=fin.read();
                if(i!=-1)
                fout.write(i);
            }
            while(i!=-1);
        }
        catch(IOException e)
        {
            System.out.println("file error");
        }
        fin.close();
        fout.close();
    }
}