数组未使用Arrays.binarySearch返回正确的响应

Okay so here is my code.

好的,这是我的代码。

import java.util.*;

//@Author: Tyler Cage
public class main {

public static void main(String[] args) {
    Scanner scnr = new Scanner(System.in);
    String[] userID = new String[3];
    String[] password = new String[3];

    for ( int i = 0; i < userID.length; i++){
        System.out.print("User id at index #" + i + " ");
        userID[i] = scnr.next();
        System.out.print("Password at index #" + i + " ");
        password[i] = scnr.next();
    }

    System.out.print("Enter user id: ");
    String userIdInput = scnr.next();

    System.out.print("Enter password: ");
    String passwordInput = scnr.next();

    int x = Arrays.binarySearch(userID, userIdInput);
    int y = Arrays.binarySearch(password, passwordInput);

    if(x == y){
        System.out.println("Logged in!");
    }
    else{
        System.out.println("Invalid user id/password combo!");
    }        
}
import