CODEWITHSUNDEEP
javahashmap
Shalin1310
Shalin1310

Reputation: 11

Finding Key from Hashmap using Values(with space)

Here i am trying to get key from value in Hashmap, but whenever i am trying "United Kingdom of Great Britain and Northern Ireland", it should return "GBR". It is showing me "No Records Found". How to solve this. Any help will be appreciated.

(Here if you will enter country code then it will return country name and if you will enter country NAME then it will return country CODE.)

public class AppliedWithCS_1 {

public static Object getKeyFromValue(HashMap hashMap, Object value) {
for (Object o : hashMap.keySet()) {
  if (hashMap.get(o).equals(value)) {
    return o;
  }
}
return null;
}

public static void main(String[] args) {

    HashMap hashMap=new HashMap<>();
    hashMap.put("AFG","Afghanistan");
    hashMap.put("GBR","United Kingdom of Great Britain and Northern Ireland");
    hashMap.put("IDN","Indonesia");
    hashMap.put("IND","India");
    System.err.println("Enter Country Code or Country Name=");
    Scanner scanner=new Scanner(System.in);
    String s1=scanner.next();
    if(s1.length()>3&&hashMap.containsValue(s1))
    {
        System.out.println(getKeyFromValue(hashMap,s1));
    }
    else if(hashMap.containsKey(s1))
        System.err.println(hashMap.get(s1));
    else
        System.err.println("No Records Found");
}
}

Output:

   Enter Country Code or Country Name=
   Afghanistan
   AFG

   Enter Country Code or Country Name=
   United Kingdom of Great Britain and Northern Ireland
   No Records Found

Upvotes: 0

Views: 4024

Answers (1)

azro
azro

Reputation: 54148

You have to use String s1 = scanner.nextLine();, instead of String s1 = scanner.next();

And it'll work and output : GBR

Because next() (from the doc) will use by default, spaces as delimiter so it takes only the forst word

In your case after String s1 = scanner.next();, s1 was juste United

Upvotes: 2

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