51 lines
1.4 KiB
Java
51 lines
1.4 KiB
Java
/*
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* File: linear_search.java
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* Created Time: 2022-11-25
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* Author: Krahets (krahets@163.com)
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*/
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package chapter_searching;
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import include.*;
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public class linear_search {
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/* 线性查找（数组） */
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static int linearSearch(int[] nums, int target) {
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// 遍历数组
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for (int i = 0; i < nums.length; i++) {
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// 找到目标元素，返回其索引
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if (nums[i] == target)
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return i;
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}
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// 未找到目标元素，返回 -1
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return -1;
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}
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/* 线性查找（链表） */
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static ListNode linearSearch(ListNode head, int target) {
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// 遍历链表
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while (head != null) {
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// 找到目标结点，返回之
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if (head.val == target)
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return head;
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head = head.next;
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}
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// 未找到目标结点，返回 null
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return null;
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}
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public static void main(String[] args) {
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int target = 3;
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/* 在数组中执行线性查找 */
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int[] nums = { 1, 5, 3, 2, 4, 7, 5, 9, 10, 8 };
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int index = linearSearch(nums, target);
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System.out.println("目标元素 3 的索引 = " + index);
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/* 在链表中执行线性查找 */
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ListNode head = ListNode.arrToLinkedList(nums);
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ListNode node = linearSearch(head, target);
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System.out.println("目标结点值 3 的对应结点对象为 " + node);
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}
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}
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