Library.java

   1 import java.io.*;
   2 import java.util.*;
   3
   4 public class Library {
   5
   6     private static BufferedReader read = new BufferedReader(new InputStreamReader(System.in));
   7
   8     public static String prompt() {
   9         try {
  10             return read.readLine();
  11         }
  12         catch (IOException e) {
  13             System.err.println(e);
  14         }
  15         return null;
  16     }
  17
  18     public static String prompt(String prompt) throws IOException {
  19         print(prompt);
  20         try {
  21             return read.readLine();
  22         }
  23         catch (IOException e) {
  24             System.err.println(e);
  25         }
  26         return null;
  27     }
  28
  29     public static int promptInt(String prompt) throws IOException {
  30         print(prompt);
  31         try {
  32             return Integer.parseInt(read.readLine());
  33         }
  34         catch (IOException e) {
  35             System.err.println(e);
  36         }
  37         return -1;
  38     }
  39
  40     private static void print(String prompt) {
  41         System.out.print(prompt);
  42     }
  43 }