Constructors in Java

The main construction method is to create an instantiated object of the class, but the initialization of the instantiated object is done. Declaration format:

Constructor method's modifier list class name (method parameter list)

Construction methods can be overloaded as well as normal methods.

Characteristics of the construction method:

1. The constructor method name must be exactly the same as the class name.

2. The constructor method does not have any return value type, neither the return value nor the shut-off void can be joined, but it is not a construction method, it becomes the common method.

3. any construction method, if there is no definition displayed, the system defines a default constructor for the class that does not contain any arguments . If the constructed method is defined, the default constructor with no parameters is not created by the system.

Recommendation: When writing a construction method, be sure to add a parameterless construction method.

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Constructors in Java