Câu hỏi phỏng vấn Java
Câu hỏi

Does Java support defa...

Câu trả lời

No, Java does not support default parameter values in the same way that some other programming languages like C++ or JavaScript do. In languages with this feature, you can assign a default value to a parameter directly in the method signature, which will be used if no argument is provided for that parameter when the method is called.

However, in Java, you cannot declare a method with a predefined value for a parameter in its signature. Instead, Java developers have developed several workarounds to simulate the behavior of default parameters. The most common techniques include:

  1. Method Overloading: This involves creating multiple methods with the same name but different parameter lists. You can have a version of the method with fewer parameters that calls the version with more parameters, providing default values for the missing parameters[2][3][4][8].

  2. Using Nulls: You can write a method that accepts all possible parameters and checks for null values within the method body, assigning default values where necessary. This approach requires the caller to pass null for any parameter they wish to be defaulted[2].

  3. Builder Pattern: This design pattern involves creating a separate Builder class that constructs the desired object step by step, allowing for default values to be set during the construction process. This is more flexible and can be particularly useful when dealing with objects that have a large number of par...

senior

senior

Gợi ý câu hỏi phỏng vấn

middle

Explain the role of Driver in JDBC.

junior

How HashMap works in Java?

expert

What's wrong with Double Brace Initialization in Java?

Bình luận

Chưa có bình luận nào

Chưa có bình luận nào