JAVA实现的酒店管理系统

				package file1;
				
				/*
				 * @Author:黄顺武
				 * Description:判断用户输入的年月格式是否符合规范
				 */
				import java.util.StringTokenizer;
				import javax.swing.JOptionPane;
				
				public class CheckYearMonth {
				
					private int year = -1;
					private int month = -1;
				
					public CheckYearMonth() {
				
					}
				
					public String check(String value) {
						try {
							if (value.indexOf("-") == -1) {
								JOptionPane.showMessageDialog(null, "年月必须为如:2007-09的格式!", "",
										JOptionPane.INFORMATION_MESSAGE);
								return null;
							}
							StringTokenizer st = new StringTokenizer(value, "-");
							if (st.countTokens() != 2) {
								JOptionPane.showMessageDialog(null, "年月必须为如:2007-09的格式!", "",
										JOptionPane.INFORMATION_MESSAGE);
								return null;
							}
							int count = 0;
							while (st.hasMoreTokens()) {
								count++;
								if (count == 1) {
									year = Integer.valueOf(st.nextToken());
								} else if (count == 2) {
									month = Integer.valueOf(st.nextToken());
									break;
								}
							}
							if (year 								JOptionPane.showMessageDialog(null, "年月必须为如:2007-09的格式!", "",
										JOptionPane.INFORMATION_MESSAGE);
								return null;
							}
						} catch (NumberFormatException nfe) {
							JOptionPane.showMessageDialog(null, "年月必须为如:2007-09的格式!", "",
									JOptionPane.INFORMATION_MESSAGE);
							return null;
						}
						return value;
					}
				
					public int getYear() {
						return year;
					}
				
					public int getMonth() {
						return month;
					}
				}