This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
why the following code,which contains hashmap even after being populated with keys/values contains null,that is patternAsso hashmap contains null value,can any one tell why it happened. thanks for support