The java.util package provides a number of utility classes and interfaces to work with collections. One of these utility classes is the Collections class, which provides methods to perform basic operations on collections. One such method is the emptySet() method.
The emptySet() method returns an immutable set with no elements. It is useful when an empty set is needed as a constant value, or when a method needs to return a set but has no elements to return.
Here are some code examples demonstrating the usage of the emptySet() method:
Example 1: Creating an empty set.
Set emptySet = Collections.emptySet();
Example 2: Returning an empty set from a method.
public Set getEmptySet() { return Collections.emptySet(); }
Example 3: Using an empty set as a constant value.
public static final Set EMPTY_SET = Collections.emptySet();
The Collections class is part of the java.util package.
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