고성능 데이터베이스 검색 알고리즘의 Java 구현 기술에 대한 토론

public class LinearSearch {
    public static int linearSearch(int[] arr, int target) {
        for (int i = 0; i < arr.length; i++) {
            if (arr[i] == target) {
                return i;
            }
        }
        return -1;
    }
}

import java.util.Arrays;

public class BinarySearch {
    public static int binarySearch(int[] arr, int target) {
        Arrays.sort(arr); // 先对数组进行排序
        int left = 0;
        int right = arr.length - 1;
        
        while (left <= right) {
            int mid = (left + right) / 2;
            if (arr[mid] == target) {
                return mid;
            } else if (arr[mid] < target) {
                left = mid + 1;
            } else {
                right = mid - 1;
            }
        }
        
        return -1;
    }
}

import java.util.HashMap;
import java.util.Map;

public class HashSearch {
    public static int hashSearch(int[] arr, int target) {
        Map<Integer, Integer> map = new HashMap<>();
        for (int i = 0; i < arr.length; i++) {
            map.put(arr[i], i);
        }
        
        return map.getOrDefault(target, -1);
    }
}

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class InvertedIndex {
    public static Map<String, List<Integer>> createIndex(String[] documents) {
        Map<String, List<Integer>> index = new HashMap<>();
        
        for (int i = 0; i < documents.length; i++) {
            String[] words = documents[i].split(" ");
            for (String word : words) {
                if (!index.containsKey(word)) {
                    index.put(word, new ArrayList<>());
                }
                index.get(word).add(i);
            }
        }
        
        return index;
    }
    
    public static List<Integer> search(Map<String, List<Integer>> index, String keyword) {
        return index.getOrDefault(keyword, new ArrayList<>());
    }
}