Null check in map gets null pointer exception

Question

I am trying to use a Java HashMap. Using map.get("A") to get a value for a key from the map resulted in a NullPointerException. Then I used if(map.get("A")) to avoid a NullPointerException being thrown, but it gets thrown anyway.

What am I doing wrong?

Answer 1

I have answering my own question. I have used to check

         if(map.containsKey("A"))
                 String b =  map.get("A")

rather than

    if(map.get("A") != null)
            map.get("A")

It will help me to avoid null pointer exception