检查数组条目在Java中是否已存在

public static boolean isItemExists(int[] array, int target) {
    for (int item : array) {
        if (item == target) {
            return true;
        }
    }
    return false;
}

import java.util.Arrays;

public static boolean isItemExists(int[] array, int target) {
    int index = Arrays.binarySearch(array, target);
    return index >= 0;
}

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public static boolean isItemExists(int[] array, int target) {
    List<Integer> list = new ArrayList<>(Arrays.asList(array));
    return list.contains(target);
}