Java實現的簡單電話號碼儲存

Java實現的簡單電話號碼儲存：

1. package com.sinosuperman.example;
3. import java.io.BufferedReader;
4. import java.io.File;
5. import java.io.FileReader;
6. import java.io.IOException;
7. import java.util.StringTokenizer;
8. import java.util.TreeMap;
10. import javax.swing.JOptionPane;
12. public class PhoneNoteBook {
14. private final File phoneNoteBookFile;
16. private TreeMap<String, String> phoneNoteBookMap;
18. public PhoneNoteBook(String fileName) throws IOException {
19. phoneNoteBookMap = new TreeMap<String, String>();
20. phoneNoteBookFile = new File(fileName);
21. loadAllRecords();
22. }
24. private void loadAllRecords() throws IOException {
25. BufferedReader reader = new BufferedReader(new FileReader(phoneNoteBookFile));
26. String line = reader.readLine();
27. while (line != null) {
28. StringTokenizer str = new StringTokenizer(line, "\t");
29. String name = str.nextToken();
30. String phone = str.nextToken();
31. phoneNoteBookMap.put(name, phone);
32. line = reader.readLine();
33. }
34. reader.close();
35. }
37. private void addRecord() {
38. String name = JOptionPane.showInputDialog("Please enter the name:\n");
39. String phone = JOptionPane.showInputDialog("Please enter the phone:\n");
40. if (JOptionPane.showConfirmDialog(null, "Are you sure?") == JOptionPane.YES_OPTION) {
41. phoneNoteBookMap.put(name, phone);
42. } else {
43. JOptionPane.showMessageDialog(null, "Operation has been canceled");
44. }
45. }
47. private void updateRecord() {
48. String name = JOptionPane.showInputDialog("Please enter the name:\n");
49. String phone = JOptionPane.showInputDialog("Please enter his/her new phone name:\n");
50. if (!phoneNoteBookMap.containsKey(name)) {
51. if (JOptionPane.showConfirmDialog(null, "This name does not exist. Do you want to create a new one?") == JOptionPane.YES_OPTION) {
52. phoneNoteBookMap.put(name, phone);
53. } else {
54. JOptionPane.showMessageDialog(null, "Operation has been canceled");
55. }
56. } if (JOptionPane.showConfirmDialog(null, "Are you sure to modify his/her phone number?") == JOptionPane.YES_OPTION) {
57. phoneNoteBookMap.put(name, phone);
58. } else {
59. JOptionPane.showMessageDialog(null, "Operation has been canceled");
60. }
61. }
63. private void searchRecord() {
64. String name = JOptionPane.showInputDialog("Please the name for searching");
65. if (phoneNoteBookMap.containsKey(name)) {
66. JOptionPane.showMessageDialog(null, phoneNoteBookMap.get(name));
67. } else {
68. JOptionPane.showMessageDialog(null, "The name you are searching does not exists.");
69. }
70. }
72. private void removeRecord() {
73. String name = JOptionPane.showInputDialog("Please enter the name:\n");
74. if (!phoneNoteBookMap.containsKey(name)) {
75. JOptionPane.showConfirmDialog(null, "This name does not exist. So you don't need to remove it.");
76. } else if (JOptionPane.showConfirmDialog(null, "Are you sure to remove his/her record?") == JOptionPane.YES_OPTION) {
77. phoneNoteBookMap.remove(name);
78. } else {
79. JOptionPane.showMessageDialog(null, "Operation has been canceled");
80. }
81. }
83. public void display() {
84. String message = "Please select an operation:\n" +
85. "Enter \"1\" to add a new record;\n" +
86. "Enter \"2\" to update a existing record;\n" +
87. "Enter \"3\" to find a phone number;\n" +
88. "Enter \"4\" to remove a existing record.\n";
90. int choice = 0;
91. try {
92. choice = Integer.parseInt(JOptionPane.showInputDialog(message));
93. switch (choice) {
94. case 1:
95. addRecord();
96. break;
97. case 2:
98. updateRecord();
99. break;
100. case 3:
101. searchRecord();
102. break;
103. case 4:
104. removeRecord();
105. break;
106. default:
107. }
108. } catch (NumberFormatException e) {
109. }
111. if (JOptionPane.showConfirmDialog(null, "Would you want to continue?") != JOptionPane.YES_OPTION) {
112. JOptionPane.showMessageDialog(null, "Thank you.");
113. } else {
114. display();
115. }
116. }
117. }

測試驅動程序：

1. package com.sinosuperman.driver;
3. import java.io.IOException;
5. import com.sinosuperman.example.PhoneNoteBook;
7. public class Driver {
8. public static void main(String[] args) throws IOException {
9. PhoneNoteBook phoneNoteBook = new PhoneNoteBook("PhoneNoteBook.txt");
10. phoneNoteBook.display();
11. }
12. }