Look at the following code output results Java

Source: Internet
Author: User

Compile error

Before calling the subclass constructor, the parent class constructor is called first, when the parent class constructor is not invoked by using "super (parameter or parameterless)" in the subclass constructor, and is the default call to the parent class's parameterless constructor, and if the parent class contains a parameter constructor, but there is no parameterless constructor, it must be used in the subclass constructor. Super (parameter) "specifies that a parameter constructor for the parent class is called, or the error will be

Look at the following code output results Java

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