If I use HashMap<String, ArrayList> in Java -


मैं जावा में हैशमैप & lt; स्ट्रिंग, अर्रेलिस्ट & lt; स्ट्रिंग & gt; & gt; का उपयोग करता हूं।

जब इनपुट मान आता है,

उदाहरण के लिए, इनपुट मान [1, "stack"] , [2, "over"] , [1, "प्रवाह"] .....

मैं मान दर्ज करना चाहता हूं [1, ["stack", "flow"]] < / कोड>, [2, "ओवर"] हैशमैप में।

लेकिन कुंजी मान डुप्लिकेट है तो, हैशमैप को अधिलेखित किया गया था।

तो, मैं क्या कर सकता हूं?

कोशिश करो A:

जावा में ग्राफ का प्रतिनिधित्व करने वाला पारंपरिक तरीका है मानचित्र & lt; V, सेट & lt; V & gt; & gt; , जो कई तरीकों से अजीब है अमरूद के बहुआयामी रूपरेखा कुंजी से एक मैपिंग को कई मानों को संभालना आसान बनाता है।

ए ListMultimap मानों की एक सूची में कुंजी को मैप करेगा उनके आदेश का, जबकि एक SetMultimap अलग मानों के सेट में कुंजी को मैप करेगा।

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