Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
In Perl if I want to have a multi-layered hash, I would write:
$hash_ref->{'key1'}->{'key2'}='value';
Where 'key1' might be a person’s name, 'key2' might be “Savings Account” (vs. “Checking Account”) and 'value' might be the amount of money in the account.
Is there an equivalent to this in Java, i.e. access values via hash references? What’s the syntax like for this? Any examples or other resource references would be greatly appreciated. Thanks!
You can have a
Map<Map<..>>, where you’ll be able to callmap.get("key1").get("key2")But note that Java is a statically-typed, object-oriented language. So you’d better creat classes:
Person,SavingsAccount, and aPersonhas a fieldprivate SavingsAccount savingsAcount. Then you’ll be able to do a compile-time safe:map.get("John").getSavingsAccount()