线性搜索

public class LinearSearch { public static void main(String[] args) { int[] ints = {5, 3, 4, 1, 2}; System.out.println(search(ints, 4)); } public static int search(int[] arr, int key) { //循环 for (int i = 0; i < arr.length; i++) { //比较是否等于key if (arr[i] == key) { return arr[i]; } } //找不到就返回-1 return -1; } }