To create an object of a particular type, you need to instantiate the type. Value types are instantiated by assigning them a value. Reference types are instantiated using the new keyword. Using new allows us to create a new instance of the type.
When new is used to instantiate a type, the type’s constructor is called to perform the initialization. The type may have a default constructor that takes no parameters, or it may have a constructor that takes one or more parameter values. It may also support multiple constructors.
Variables declared as instances of reference types will hold the value null until they are instantiated.
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| Person p1; // Not instantiated, value is null// p2 points to new instance of the Person class// Default constructor, takes no parametersPerson p2 = new Person();// Construct another Person object using a// different constructor, which takes Name and AgePerson p3 = new Person("Sean", 46); |