How Can I Implement Optional Parameters in Java?

Optional Parameters in Java

Optional parameters allow methods to receive a variable number of arguments. There are several ways to implement this behavior in Java:

Method Overloading

Create multiple methods with the same name but different argument lists. Optional parameters can be omitted.

Varargs

Use variable-length argument lists to specify optional parameters. The type of optional parameters must be the same.

Nulls

Allow optional parameters to be null. Check for null values in the method body.

Optional Class

Use Java 8's Optional class to indicate parameters with default values.

Builder Pattern

Create a separate builder class with fluent setters for optional parameters.

Maps

Use a map to pass optional parameters by name/value pairs.

These approaches can be combined to suit specific requirements.

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