如何修改我的代码以获取所有非唯一值？

def find_non_unique_values(data):
    counts = {}
    for value in data:
        counts[value] = counts.get(value, 0) + 1
    non_unique_values = [value for value, count in counts.items() if count > 1]
    return non_unique_values

# 示例数据
data = [1, 2, 2, 3, 4, 4, 5]
print(find_non_unique_values(data))  # 输出: [2, 4]

function findNonUniqueValues(data) {
    const counts = {};
    data.forEach(value => {
        counts[value] = (counts[value] || 0) + 1;
    });
    return Object.keys(counts).filter(value => counts[value] > 1);
}

// 示例数据
const data = [1, 2, 2, 3, 4, 4, 5];
console.log(findNonUniqueValues(data));  // 输出: [ '2', '4' ]

import java.util.*;

public class NonUniqueValues {
    public static List<Integer> findNonUniqueValues(List<Integer> data) {
        Map<Integer, Integer> counts = new HashMap<>();
        for (Integer value : data) {
            counts.put(value, counts.getOrDefault(value, 0) + 1);
        }
        List<Integer> nonUniqueValues = new ArrayList<>();
        for (Map.Entry<Integer, Integer> entry : counts.entrySet()) {
            if (entry.getValue() > 1) {
                nonUniqueValues.add(entry.getKey());
            }
        }
        return nonUniqueValues;
    }

    public static void main(String[] args) {
        List<Integer> data = Arrays.asList(1, 2, 2, 3, 4, 4, 5);
        System.out.println(findNonUniqueValues(data));  // 输出: [2, 4]
    }
}