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Java code to Prevent duplicate pairs in HashMap/HashTable

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梦谈多话
梦谈多话 2021-01-17 02:32

I have a HashMap as below (assuming it has 10,0000 elements)

HashMap hm = new HashMap();
hm.put(\

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  • 醉话见心
    醉话见心 (楼主)
    2021-01-17 02:45 

    List yourElements = new ... // 10000000
for(Object O : yourElements) {
 if(myMap.get(O.key)==null) {
    myMap.put(O.key,O);
 }
}

    
    
             
    
                                                        
    
            
            
    
              
                
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