Use Java's extends keyword to derive a child class from a parent class, invoke parent class constructors and methods, override methods, and more.

When to use overloaded constructors As you can see, it can make sense to perform constructor overloading even in a simple Java class that that has only two properties. For more complex classes, it's ...

How to use Java's default constructor Although the default constructor in Java is convenient and easy to use, developers must understand some important rules about its existence and implementation.