我想使用hashmap打印不重复的数字；

def print_unique_numbers(numbers):
    hashmap = {}
    for num in numbers:
        if num not in hashmap:
            hashmap[num] = 1
    for key in hashmap.keys():
        print(key)

numbers = [1, 2, 3, 4, 3, 2, 5]
print_unique_numbers(numbers)

import java.util.HashMap;

public class UniqueNumbersPrinter {
    public static void printUniqueNumbers(int[] numbers) {
        HashMap<Integer, Integer> hashmap = new HashMap<>();
        for (int num : numbers) {
            if (!hashmap.containsKey(num)) {
                hashmap.put(num, 1);
            }
        }
        for (int key : hashmap.keySet()) {
            System.out.println(key);
        }
    }

    public static void main(String[] args) {
        int[] numbers = {1, 2, 3, 4, 3, 2, 5};
        printUniqueNumbers(numbers);
    }
}