2023 package org mpilone cmsc335 project1 import it sauronsoftware ftp4j FTPClient import it sauronsoftware ftp4j FTPException import it sauronsoftware ftp4j FTPIllegalReplyException import java io IOException import java net MalformedURLException import java net URL Utility class for | Assignment Collections

package org.mpilone.cmsc335.project1; import it.sauronsoftware.ftp4j.FTPClient; import it.sauronsoftware.ftp4j.FTPException; import it.sauronsoftware.ftp4j.FTPIllegalReplyException; import java.io.IOException; import java.net.MalformedURLException; import java.net.URL; /** * Utility class for building FTP {@link URL}s and {@link FTPClient}s. This * class follows the builder pattern where the builder is configured through a * series of setter calls and then instances of the target type are created with * the build methods. This class is thread-safe through simple synchronization. * * @author mpilone */ public class FTPBuilder { private String host; private int port; private String username; private String password; /** * Sets the host of the remote FTP site. * * @param host the host name or IP address * @return the builder */ public synchronized FTPBuilder setHost(String host) { this.host = host; return this; } /** * Sets the port of the remote FTP site. * * @param port the port number * @return the builder */ public synchronized FTPBuilder setPort(int port) { this.port = port; return this; } /** * Sets the username for authentication on the remote FTP site. * * @param username the username for remote authentication * @return the builder */ public synchronized FTPBuilder setUsername(String username) { this.username = username; return this; } /** * Sets the password for authentication on the remote FTP site. * * @param password the password for remote authentication * @return the builder */ public synchronized FTPBuilder setPassword(String password) { this.password = password; return this; } /** * Builds a new {@link FTPClient}, connects to the remote host, authenticates, * and configures the connection for passive, binary transfers. * * @return the new FTPClient instance * @throws IOException if any IO or FTP error…