how to search equalignorecase search with hashmap

[vijayakumar durai]

Hi friends,
I am adding company name in the hash map .I have text box .If user type 'A' or 'a' I have to display 'A' or 'a' company to the user.can anybody tell how to search equalignorecase search in hashmap?

My code

  for(int i=0;i<stockparsedvalue.size();i++)
		    {
		      StockParserSet parserSet=(StockParserSet)stockparsedvalue.get(i);	
		      
		      //System.out.println("parser company"+parserSet.getCompanyname());
		      mapValue.put("companyname"+i, parserSet.getCompanyname());
		      //searchlistcompany.add(mapValue);
		    } 	       
		   
		
		
		  int j=0;
           
		  for(Entry><String,String> e : mapValue.entrySet()) 
			  {
			        
				  if(e.getValue().startsWith(searchvalue))
				  { 
			 	    
					  
					  //System.out.println("get a  value is"+ e.getValue());
				 	       HashMap<String,String> searchValue=new HashMap<String, String>();   	             
				 	        searchValue.put("companyname"+j,e.getValue());
                         //System.out.println("search map value"+searchValue.get("companyname"+j) );
				 	       searchlist.add(searchValue);
			 	        j=j+1;

				  }
			  }
		  

[Darryl Burke]

1. Convert to lowercase before adding to the Map
2. Convert the search String to lowercase and search on that.

Or use uppercase for both. Whatever.

[Ganesh Gowtham]

If you want to preserve the "case" in Hashmap's Key , then while searching use equalsIgnoreCase(...)

[vijayakumar durai]

I want to search equalignorecase on hashmap value can anybody give example I tried but its not working

I am searching value here

if(e.getValue().startsWith(searchvalue))   
                  {    
                       

[Campbell Ritchie]

If you are adding numbers to the key, you will have to record the numbers, otherwise you will never find the key again. Using "companyname123" as a key looks like bad design to me. In fact it sounds as if you are not using the Map as a Map. Maybe you ought to use a List and simply look for item 123.

[Rob Spoor]

Use a TreeMap<String>(String.CASE_INSENSITIVE_ORDER). This will use a Comparator<String> that ignores the case. Note that, as the API indicates, this is actually a breach of the Map contract:

Map<String,String> map1 = new HashMap<String,String>();
Map<String,String> map2 = new TreeMap<String,String>(String.CASE_INSENSITIVE_ORDER);
map1.put("a", "a");
map2.put("A", "a");
System.out.println(map1.equals(map2)); // currently true
System.out.println(map2.equals(map1)); // currently false

I said currently, because it all depends on the way equals is implemented. If the method loops over its own contents and checks if the other map has the same key/value pairs, then you get this. If the method loops over the other map then the output will be reversed.

[Ganesh Gowtham]

Rob Prime wrote:Use a TreeMap<String>(String.CASE_INSENSITIVE_ORDER). This will use a Comparator<String> that ignores the case. Note that, as the API indicates, this is actually a breach of the Map contract:

Map<String,String> map1 = new HashMap<String,String>();
Map<String,String> map2 = new TreeMap<String,String>(String.CASE_INSENSITIVE_ORDER);
map1.put("a", "a");
map2.put("A", "a");
System.out.println(map1.equals(map2)); // currently true
System.out.println(map2.equals(map1)); // currently false

I said currently, because it all depends on the way equals is implemented. If the method loops over its own contents and checks if the other map has the same key/value pairs, then you get this. If the method loops over the other map then the output will be reversed.

Hi rob

Map<String,String> map2 = new TreeMap<String,String>(String.CASE_INSENSITIVE_ORDER);

Thanks for showing another way of doing

[Rob Spoor]

You're welcome.