English Japanese Dictionary

import java.util.Map;
import java.util.Map.Entry;
import java.util.Scanner;
import java.util.TreeMap;

public class EnglishJapaneseDictionary {
  public static void main(String[] args) {
    Scanner in = null;
    try {
      in = new Scanner(System.in);
    }
    catch (Exception e) {
      System.exit(1);
    }
    Map<String, String> dict = new TreeMap<String, String>();
    while (true) {
      System.out.println("＜メニュー選択＞ １．追加、２．削除、３．検索、４．一覧表示、５．終了");
      int choice = new Integer(in.nextLine());
      if (choice == 1) {
        System.out.println("追加する英単語");
        String word = in.nextLine().trim();
        System.out.println("意味");
        dict.put(word, in.nextLine().trim());
      }
      if (choice == 2) {
        System.out.println("削除する単語");
        dict.remove(in.nextLine().trim());
      }
      if (choice == 3) {
        System.out.println("検索する英単語");
        System.out.println("意味は" + dict.get(in.nextLine().trim()) + "です");
      }
      if (choice == 4) {
        for (Entry<String, String> e: dict.entrySet()) {
          System.out.println(e.getKey() + " " + e.getValue());
        }
      }
      if (choice == 5) break;
    }
    in.close();
  }
}