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In C#
Dictionary<String, String> dictionary = new Dictionary<String, String>(); In Java, this errors with
Cannot instantiate the type Dictionary
What could be wrong?
In my code this follows with
dictionary.put("vZip", jsonUdeals.getString("vZip")); I know this sounds too trivial. But I am at a loss!
If Dictionary doesn't do it(which I strongly suspect by now), then which DataStructure to use.
510
A Java dictionary is an abstract class that stores key-value pairs. Given a key, its corresponding value can be stored and retrieved as needed; thus, a dictionary is a list of key-value pairs. The Dictionary object classes are implemented in java.
In Java, Dictionary is the list of key-value pairs. We can store, retrieve, remove, get, and put values in the dictionary by using the Java Dictionary class. In this section, we will discuss the Java Dictionary class that stores data in key-value pairs just like the Map interface.
The put() method of Dictionary is used to insert a mapping into the dictionary. This means a specific key along with the value can be mapped into a particular dictionary.
Dictionary is an abstract class in Java. It is also obsolete; you should use the Map interface instead; something like:
Map<String,String> map = new HashMap<String,String>(); Note that HashMap<K,V> is a concrete class, but we're assigning it to a Map<K,V> reference, which is an interface. This is the recommended style in Java, because it allows you to switch HashMap for e.g. Hashtable at a later stage, without having to change everything.
192
Use a HashMap as follows:
Map<String, String> dictionary = new HashMap<String, String>(); If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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