Sets And Maps In Java

The remainder of this page discusses the map interface in detail. After you create an unmodifiable instance of a collection, it holds the same data as long as a reference to it exists. The collection framework contains numerous interfaces and classes that are used with a wide range of collection types.

The method does not take any parameter. It basically returns a set view of the map or we can create a new set and store the map elements into them. 1) if you do not want to have duplicate values in the database then set should be your first choice as all of its classes do not allow duplicates.

If wasn't there, adds it and returns true, o.w., returns false and set unchanged myset.remove(blob);

For example, the following line of code, Map is an interface in java and belongs to java.util package. The following converts a map to an object: The remainder of this page discusses the map interface in detail.