Java實現(xiàn)線性表的順序存儲
本文實例為大家分享了Java實現(xiàn)線性表的順序存儲,供大家參考,具體內(nèi)容如下
順序表:用一組地址連續(xù)的存儲單元依次存儲各個元素,使得在邏輯結(jié)構(gòu)上相鄰的數(shù)據(jù)元素存儲在相鄰的物理存儲單元中的線性表
package algorithm.datastructure.seqlist;/*順序表** 用一組地址連續(xù)的存儲單元依次存儲各個元素,使得在邏輯結(jié)構(gòu)上相鄰的數(shù)據(jù)元素存儲在相鄰的物理存儲單元中的線性表**/public class SeqList { private int length;//順序表長度 private int[] list;//數(shù)組,連續(xù)的存儲空間 //初始化,構(gòu)造一個空的線性表 public SeqList(int listLength) { list = new int[listLength]; } //銷毀表 public void destroyList() { list = null; this.length = 0; } //將線性表置為空表 public void clearList() { for (int i = 0; i < getLength(); i++) { list[i] = 0; } } //判斷線性表是否未空表 public Boolean isEmpty() { return getLength() == 0; } //獲取線性表元素個數(shù) public int getLength() { return length; } //根據(jù)下標獲取線性表元素 public int getElem(int i) { if (i < 0 || i >= getLength()) { try {throw new Exception('線性表下標越界'); } catch (Exception e) {e.printStackTrace(); } } return list[i]; } //返回某元素(第一個)的前驅(qū) public Integer priorElem(int element) { for (int i = 0; i < getLength(); i++) { if (element == list[i]) {if (i == 0) { return null;} else { return list[i - 1];} } } return null; } //獲取某元素(第一個)的后繼 public Integer nextElem(int element) { for (int i = 0; i < getLength(); i++) { if (element == list[i]) {if (i == getLength() - 1) { return null;} else { return list[i + 1];} } } return null; } //擴容,這里設(shè)置容量變?yōu)樵瓉韮杀? public void ensureCapacity(int capacity) { if (capacity >= list.length) {//擴容 int tempList[] = new int[list.length * 2]; for (int i = 0; i < list.length; i++) {tempList[i] = list[i]; } list = tempList; } } //在指定位置插入元素 public Boolean insertElement(int index, int element) { if (index < 0 || index >= list.length) { try {throw new Exception('下標錯誤'); } catch (Exception e) {e.printStackTrace(); } } if (index == getLength()) { return insertTailElement(element); } for (int i = 0; i < getLength(); i++) { if (i == index) {ensureCapacity(getLength() + 1);//index位置后面的元素后移for (int j = getLength() - 1; j >= index; j--) { list[j + 1] = list[j];}list[index] = element;length++; } } return true; } //尾部插入元素 public Boolean insertTailElement(int element) { ensureCapacity(length + 1); list[++length] = element; return true; } //刪除尾部元素 public int deleteTailElement() { if (getLength() == 0) { try {throw new Exception('下標錯誤'); } catch (Exception e) {e.printStackTrace(); } } int tailElement = list[getLength() - 1]; list[getLength() - 1] = 0; length--; return tailElement; } //刪除元素 public int deleteElement(int index) { if (index < 0 || index >= list.length) { try {throw new Exception('下標錯誤'); } catch (Exception e) {e.printStackTrace(); } } if (index == getLength()) { return deleteTailElement(); } for (int i = 0; i < getLength(); i++) { if (i == index) {int tailElement = list[index];//index位置后面的元素前移for (int j = index; j < getLength() - 1; j++) { list[j] = list[j + 1];}list[getLength() - 1] = 0;length--;return tailElement; } } return 0; } //遍歷順序表 public void traverseList() { for (int i = 0; i < getLength(); i++) { System.out.println(list[i]); } } public static void main(String[] args) { //測試 SeqList seqList = new SeqList(2); System.out.println(seqList.insertTailElement(1)); System.out.println(seqList.insertTailElement(2)); System.out.println(seqList.insertTailElement(3)); System.out.println(seqList.insertTailElement(4)); System.out.println(seqList.getElem(0)); System.out.println(seqList.getElem(1)); System.out.println(seqList.getElem(2)); System.out.println(seqList.getElem(3)); System.out.println(seqList.insertElement(0, 4)); System.out.println(seqList.getElem(0)); System.out.println(seqList.getElem(1)); System.out.println(seqList.getElem(2)); System.out.println(seqList.getElem(3)); System.out.println(seqList.getElem(4)); System.out.println(seqList.priorElem(3)); System.out.println(seqList.priorElem(4)); System.out.println(seqList.nextElem(4)); System.out.println(seqList.nextElem(3));// System.out.println(seqList.deleteTailElement());// System.out.println(seqList.deleteTailElement());// System.out.println(seqList.deleteTailElement());// System.out.println(seqList.deleteTailElement());// System.out.println(seqList.deleteTailElement());// System.out.println(seqList.deleteTailElement()); System.out.println(seqList.deleteElement(0)); System.out.println(seqList.deleteElement(1)); seqList.traverseList(); }}
以上就是用Java簡單實現(xiàn)的順序表,在Java中,如果要實現(xiàn)功能更復雜,性能更高的順序表,可參考ArrayList源碼。
以上就是本文的全部內(nèi)容,希望對大家的學習有所幫助,也希望大家多多支持好吧啦網(wǎng)。
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