如何不显示一个在字符串中只出现一次的短语？

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

public class RemoveUniquePhrase {
    public static String removeUniquePhrase(String input) {
        // 统计每个短语的出现次数
        Map<String, Integer> phraseCount = new HashMap<>();
        String[] phrases = input.split(" "); // 假设短语以空格分隔
        for (String phrase : phrases) {
            phraseCount.put(phrase, phraseCount.getOrDefault(phrase, 0) + 1);
        }

        // 判断并删除只出现一次的短语
        StringBuilder result = new StringBuilder();
        for (String phrase : phrases) {
            if (phraseCount.get(phrase) > 1) {
                result.append(phrase).append(" ");
            }
        }

        return result.toString().trim();
    }

    public static void main(String[] args) {
        String input = "I love cloud computing. Cloud computing is the future.";
        String output = removeUniquePhrase(input);
        System.out.println(output);
    }
}