java实现链表
2010-03-12 17:27:08| 分类： JAVA笔记 | 标签： |字号大中小订阅
(1)简单链表 Java代码 1. package ChapterFive; 2. 3. class Link<E> { 4. 5. public E data; 6. 7. public Link<E> next; 8.
9. public Link(E data) { 10. this.data = data; 11. } 12. } 13. 14. class LinkList<E> { 15. 16. public Link<E> first;
17. //链表中数据项的个数 18. public int size; 19. 20. public LinkList() { 21. first = null; 22. size = 0; 23. } 24. //在表头插入新的数据 25. public void insertFirst(E value) { 26. Link<E> link = new Link<E>(value); 27. link.next = first; 28. first = link; 29. size++; 30. } 31. //判断链表是否为空 32. public boolean isEmpty() { 33. return size == 0; 34. } 35. //删除表头 36. public Link<E> deleteFirst() { 37. Link<E> temp = first;
38. first = first.next; 39. size--; 40. return temp; 41. } 42. //输出链表中的所有数据 43. public void display() { 44. Link<E> curr = first; 45. while (curr != null) { 46. System.out.print(curr.data + " "); 47. curr = curr.next; 48. } 49. System.out.println(); 50. } 51. //返回链表中数据项的个数
52. public int size() { 53. return size; 54. }
55. //获取从头至尾的第i个数据项 56. public Link<E> get(int i) {
57. if (i > size() - 1 || i < 0) 58. try {
59. throw new IndexOutOfBoundsException(); 60. } catch (Exception e) { 61. e.printStackTrace(); 62. } 63. Link<E> curr = first; 64. for (int n = 0; n < size(); n++) { 65. if (n == i) 66. return curr; 67. else 68. curr = curr.next; 69. } 70. return null; 71. } 72. //输出从头至尾的第i个数据项
73. public void remove(int i) { 74. if (i == 0) 75. deleteFirst(); 76. else if (i == size() - 1) 77. get(i - 1).next = null; 78. else { 79. get(i - 1).next = get(i + 1); 80. } 81. size--; 82. } 83. } 84. 85. public class Link_list { 86. public static void main(String[] args) { 87. LinkList<Long> ll = new LinkList<Long>(); 88. for (int i = 0; i < 10; i++) { 89. Long value = (long) (Math.random() * 100); 90. ll.insertFirst(value); 91. } 92. ll.display(); 93. while (!ll.isEmpty()) { 94. ll.deleteFirst(); 95. ll.display(); 96. } 97. System.out.println("Ok");
98. } 99. }
(2)链栈 Java代码 1. package ChapterFive; 2. 3. class LinkStack<E> { 4. 5. LinkList<E> linkList; 6. 7. int size; 8. 9. public LinkStack() { 10. size = 0; 11. linkList = new LinkList<E>(); 12. } 13. //入栈 14. public void push(E value) { 15. linkList.insertFirst(value);
16. size++; 17. } 18. //出栈 19. public Link<E> pop() { 20. size--; 21. return linkList.deleteFirst(); 22. } 23. //返回栈顶元素 24. public Link<E> top() { 25. return linkList.first; 26. } 27. //判断栈是否为空 28. public boolean isEmpty() { 29. return size == 0; 30. } 31. //显示栈中的全部数据 32. public void display() { 33. linkList.display(); 34. } 35. } 36. 37. public class Link_stack { 38. public static void main(String[] args) { 39. LinkStack<Long> ls = new LinkStack<Long>(); 40. for (int i = 0; i < 10; i++) { 41. Long value = new Long((long) (Math.random() * 100));
42. ls.push(value); 43. } 44. while (!ls.isEmpty()) { 45. ls.pop(); 46. ls.display(); 47. } 48. System.out.println("Ok");
49. } 50. }
(3)有序表 Java代码 1. package ChapterFive; 2. 3. class SortedLink { 4. 5. public Link<Long> first; 6. 7. int size; 8. 9. public SortedLink() { 10. first = null; 11. size = 0; 12. } 13. //向有序链表中插入数据 14. public void insert(long value) { 15. Link<Long> newLink = new Link<Long>(value); 16. Link<Long> previous = null;
17. Link<Long> curr = first; 18. while (curr != null && (value > curr.data)) { 19. previous = curr; 20. curr = curr.next; 21. } 22. if (previous == null)// 链表为空(在表头插入) 23. first = newLink; 24. else 25. previous.next = newLink;//插入新的节点 26. newLink.next = curr; 27. size++; 28. } 29. //删除第一个节点 30. public Link<Long> remove() { 31. Link<Long> temp = first;
32. first = first.next; 33. size--; 34. return temp; 35. } 36. //判断链表是否为空 37. public boolean isEmpty() { 38. return size == 0; 39. }
40. //输出链表的所有数据 41. public void display() { 42. Link<Long> curr = first; 43. while (curr != null) {
44. System.out.print(curr.data + " "); 45. curr = curr.next; 46. } 47. System.out.println(); 48. } 49. } 50. 51. public class SortedLinkApp { 52. public static void main(String[] args) {
53. SortedLink sl = new SortedLink(); 54. for (int i = 0; i < 10; i++) { 55. sl.insert((long) (Math.random() * 100)); 56. } 57. while (!sl.isEmpty()) { 58. sl.remove(); 59. sl.display(); 60. } 61. } 62. }
(4)双向链表 Java代码 1. package ChapterFive; 2. 3. class DoubleLink<E> { 4. 5. public Link<E> first; 6. 7. public Link<E> last;
8. 9. int size; 10. 11. @SuppressWarnings("hiding") 12. class Link<E> { 13. public E data; 14. 15. public Link<E> next;// 链表的下一项 16. 17. public Link<E> previous;// 链表的前一项 18. 19. public Link(E value) { 20. this.data = value; 21. } 22. } 23. 24. public DoubleLink() { 25. first = null; 26. last = null; 27. size = 0; 28. } 29. 30. // 在链表的首部插入一项 31. public void insertFirst(E value) { 32. Link<E> newLink = new Link<E>(value); 33. if (isEmpty())// 如果链表为空则first == last 34. last = newLink;
35. else 36. first.previous = newLink;// 确定原first与newLink的前后关系 37. newLink.next = first; 38. first = newLink;// 设置新的first值 39. size++; 40. }
41. 42. // 在链表的尾部插入一项 43. public void insertLast(E value) { 44. Link<E> newLink = new Link<E>(value);
45. if (isEmpty())// 如果链表为空则last == first 46. first = newLink; 47. else { 48. last.next = newLink;// 确定原last与newLink的前后关系 49. newLink.previous = last;
50. } 51. last = newLink;// 设置新的last值 52. size++; 53. } 54. 55. // 删除双向链表的表头 56. public Link<E> deleteFirst() { 57. Link<E> temp = first; 58. if (first.next == null)// 链表中只有一项数据 59. last = null; 60. else 61. first.next.previous = null;// 销毁原链表的头部 62. first = first.next;
63. size--; 64. return temp; 65. } 66. 67. // 删除链表的最后一项 68. public Link<E> deleteLast() {
69. Link<E> temp = last; 70. if (first.next == null)// 链表中只有一项数据 71. first = null; 72. else
73. last.previous.next = null;// 销毁原链表的尾部 74. last = last.previous; 75. size--; 76. return temp;
77. } 78. 79. // 判断链表是否为空 80. public boolean isEmpty() { 81. return size == 0; 82. } 83.
84. // 输出链表中的所有数据项 85. public void display() { 86. Link<E> curr = first; 87. while (curr != null) {
88. System.out.print(curr.data + " "); 89. curr = curr.next; 90. } 91. System.out.println(); 92. } 93. } 94. 95. public class DoubleLinkApp { 96. public static void main(String[] args) {
97. DoubleLink<Integer> dl = new DoubleLink<Integer>(); 98. for (int i = 0; i < 5; i++) { 99. dl.insertFirst((int) (Math.random() * 100)); 100. } 101. for (int i = 0; i < 5; i++) { 102. dl.insertLast((int) (Math.random() * 100)); 103. }
104. dl.display(); 105. while (!dl.isEmpty()) {
106. dl.deleteFirst(); 107. dl.deleteLast();
108. dl.display(); 109. } 110. System.out.println("Ok"); 111. } 112. }
9. public Link(E data) { 10. this.data = data; 11. } 12. } 13. 14. class LinkList<E> { 15. 16. public Link<E> first;
17. //链表中数据项的个数 18. public int size; 19. 20. public LinkList() { 21. first = null; 22. size = 0; 23. } 24. //在表头插入新的数据 25. public void insertFirst(E value) { 26. Link<E> link = new Link<E>(value); 27. link.next = first; 28. first = link; 29. size++; 30. } 31. //判断链表是否为空 32. public boolean isEmpty() { 33. return size == 0; 34. } 35. //删除表头 36. public Link<E> deleteFirst() { 37. Link<E> temp = first;
38. first = first.next; 39. size--; 40. return temp; 41. } 42. //输出链表中的所有数据 43. public void display() { 44. Link<E> curr = first; 45. while (curr != null) { 46. System.out.print(curr.data + " "); 47. curr = curr.next; 48. } 49. System.out.println(); 50. } 51. //返回链表中数据项的个数
52. public int size() { 53. return size; 54. }
55. //获取从头至尾的第i个数据项 56. public Link<E> get(int i) {
57. if (i > size() - 1 || i < 0) 58. try {
59. throw new IndexOutOfBoundsException(); 60. } catch (Exception e) { 61. e.printStackTrace(); 62. } 63. Link<E> curr = first; 64. for (int n = 0; n < size(); n++) { 65. if (n == i) 66. return curr; 67. else 68. curr = curr.next; 69. } 70. return null; 71. } 72. //输出从头至尾的第i个数据项
73. public void remove(int i) { 74. if (i == 0) 75. deleteFirst(); 76. else if (i == size() - 1) 77. get(i - 1).next = null; 78. else { 79. get(i - 1).next = get(i + 1); 80. } 81. size--; 82. } 83. } 84. 85. public class Link_list { 86. public static void main(String[] args) { 87. LinkList<Long> ll = new LinkList<Long>(); 88. for (int i = 0; i < 10; i++) { 89. Long value = (long) (Math.random() * 100); 90. ll.insertFirst(value); 91. } 92. ll.display(); 93. while (!ll.isEmpty()) { 94. ll.deleteFirst(); 95. ll.display(); 96. } 97. System.out.println("Ok");
98. } 99. }
(2)链栈 Java代码 1. package ChapterFive; 2. 3. class LinkStack<E> { 4. 5. LinkList<E> linkList; 6. 7. int size; 8. 9. public LinkStack() { 10. size = 0; 11. linkList = new LinkList<E>(); 12. } 13. //入栈 14. public void push(E value) { 15. linkList.insertFirst(value);
16. size++; 17. } 18. //出栈 19. public Link<E> pop() { 20. size--; 21. return linkList.deleteFirst(); 22. } 23. //返回栈顶元素 24. public Link<E> top() { 25. return linkList.first; 26. } 27. //判断栈是否为空 28. public boolean isEmpty() { 29. return size == 0; 30. } 31. //显示栈中的全部数据 32. public void display() { 33. linkList.display(); 34. } 35. } 36. 37. public class Link_stack { 38. public static void main(String[] args) { 39. LinkStack<Long> ls = new LinkStack<Long>(); 40. for (int i = 0; i < 10; i++) { 41. Long value = new Long((long) (Math.random() * 100));
42. ls.push(value); 43. } 44. while (!ls.isEmpty()) { 45. ls.pop(); 46. ls.display(); 47. } 48. System.out.println("Ok");
49. } 50. }
(3)有序表 Java代码 1. package ChapterFive; 2. 3. class SortedLink { 4. 5. public Link<Long> first; 6. 7. int size; 8. 9. public SortedLink() { 10. first = null; 11. size = 0; 12. } 13. //向有序链表中插入数据 14. public void insert(long value) { 15. Link<Long> newLink = new Link<Long>(value); 16. Link<Long> previous = null;
17. Link<Long> curr = first; 18. while (curr != null && (value > curr.data)) { 19. previous = curr; 20. curr = curr.next; 21. } 22. if (previous == null)// 链表为空(在表头插入) 23. first = newLink; 24. else 25. previous.next = newLink;//插入新的节点 26. newLink.next = curr; 27. size++; 28. } 29. //删除第一个节点 30. public Link<Long> remove() { 31. Link<Long> temp = first;
32. first = first.next; 33. size--; 34. return temp; 35. } 36. //判断链表是否为空 37. public boolean isEmpty() { 38. return size == 0; 39. }
40. //输出链表的所有数据 41. public void display() { 42. Link<Long> curr = first; 43. while (curr != null) {
44. System.out.print(curr.data + " "); 45. curr = curr.next; 46. } 47. System.out.println(); 48. } 49. } 50. 51. public class SortedLinkApp { 52. public static void main(String[] args) {
53. SortedLink sl = new SortedLink(); 54. for (int i = 0; i < 10; i++) { 55. sl.insert((long) (Math.random() * 100)); 56. } 57. while (!sl.isEmpty()) { 58. sl.remove(); 59. sl.display(); 60. } 61. } 62. }
(4)双向链表 Java代码 1. package ChapterFive; 2. 3. class DoubleLink<E> { 4. 5. public Link<E> first; 6. 7. public Link<E> last;
8. 9. int size; 10. 11. @SuppressWarnings("hiding") 12. class Link<E> { 13. public E data; 14. 15. public Link<E> next;// 链表的下一项 16. 17. public Link<E> previous;// 链表的前一项 18. 19. public Link(E value) { 20. this.data = value; 21. } 22. } 23. 24. public DoubleLink() { 25. first = null; 26. last = null; 27. size = 0; 28. } 29. 30. // 在链表的首部插入一项 31. public void insertFirst(E value) { 32. Link<E> newLink = new Link<E>(value); 33. if (isEmpty())// 如果链表为空则first == last 34. last = newLink;
35. else 36. first.previous = newLink;// 确定原first与newLink的前后关系 37. newLink.next = first; 38. first = newLink;// 设置新的first值 39. size++; 40. }
41. 42. // 在链表的尾部插入一项 43. public void insertLast(E value) { 44. Link<E> newLink = new Link<E>(value);
45. if (isEmpty())// 如果链表为空则last == first 46. first = newLink; 47. else { 48. last.next = newLink;// 确定原last与newLink的前后关系 49. newLink.previous = last;
50. } 51. last = newLink;// 设置新的last值 52. size++; 53. } 54. 55. // 删除双向链表的表头 56. public Link<E> deleteFirst() { 57. Link<E> temp = first; 58. if (first.next == null)// 链表中只有一项数据 59. last = null; 60. else 61. first.next.previous = null;// 销毁原链表的头部 62. first = first.next;
63. size--; 64. return temp; 65. } 66. 67. // 删除链表的最后一项 68. public Link<E> deleteLast() {
69. Link<E> temp = last; 70. if (first.next == null)// 链表中只有一项数据 71. first = null; 72. else
73. last.previous.next = null;// 销毁原链表的尾部 74. last = last.previous; 75. size--; 76. return temp;
77. } 78. 79. // 判断链表是否为空 80. public boolean isEmpty() { 81. return size == 0; 82. } 83.
84. // 输出链表中的所有数据项 85. public void display() { 86. Link<E> curr = first; 87. while (curr != null) {
88. System.out.print(curr.data + " "); 89. curr = curr.next; 90. } 91. System.out.println(); 92. } 93. } 94. 95. public class DoubleLinkApp { 96. public static void main(String[] args) {
97. DoubleLink<Integer> dl = new DoubleLink<Integer>(); 98. for (int i = 0; i < 5; i++) { 99. dl.insertFirst((int) (Math.random() * 100)); 100. } 101. for (int i = 0; i < 5; i++) { 102. dl.insertLast((int) (Math.random() * 100)); 103. }
104. dl.display(); 105. while (!dl.isEmpty()) {
106. dl.deleteFirst(); 107. dl.deleteLast();
108. dl.display(); 109. } 110. System.out.println("Ok"); 111. } 112. }
