ssD3 Practical Quiz 2 答案

import java.io.*; import java.util.*; /** *This class provides a method that reads choice from the *standard input. And it can displays the information of *ICarnegie. * @author WenLilong * @version 1.0.0 */ public class ICarnegieInfoApplication { private static BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in)); private static PrintWriter stdOut = new PrintWriter(System.out, true); private static PrintWriter stdErr = new PrintWriter(System.err, true); /* DOCUMENT THIS PUBLIC METHOD */ /** *This is the main idea. * Attach the choice with each certain information. * @param args not used * @throws IOException if errors reading from standard input. */ public static void main(String[] args) throws IOException { ICarnegieInfo companyInfo = ICarnegieInfo.getInstance(); int choice = getChoice(); while (choice != 0) { if (choice == 1) { stdOut.println(companyInfo.getName()); } else if (choice == 2) { stdOut.println(companyInfo.getAddress()); } else if (choice == 3) { stdOut.println(companyInfo.getTelephone()); } else if (choice == 4) { stdOut.println(companyInfo.getEmail()); } else if (choice == 5) { stdOut.println(companyInfo.getUrl()); } choice = getChoice(); } } private static int getChoice() throws IOException { do { int input; try { stdErr.println(); stdErr.print("[0] Quit\n" + "[1] displays name\n" + "[2] displays address\n" + "[3] displays telephone\n" + "[4] displays email\n" + "[5] displays URL \n" + "choice>"); stdErr.flush(); input = Integer.parseInt(stdIn.readLine()); if (0 <= input && 5 >= input) { return input; } else { stdErr.println("Invalid choice: " + input); } } catch (NumberFormatException nfe) { stdErr.println(nfe); } } while (true); /* PLACE YOUR CODE HERE */ //return 0; /* CHANGE THIS STATEMENT AS NEEDED */ } }