Java Tutorial [01.02] The meaning of Java reference type array and inheritance

The meaning of Java reference type array and inheritance

Java reference type array and inheritance are two commonly used concepts in Java, and they play an important role in programming. In this tutorial, we will discuss the use of arrays of reference types in Java and the meaning of inheritance, and provide related examples.

Step 1: Create an array of reference types

Arrays of reference types in Java allow us to store references to multiple objects in a single variable. We can use arrays to store objects and access specific objects by indexing.

Person[] people = new Person[3];

In the above example, we have created a peoplereference type array called , which can store references to 3 Personobjects. This array will take up memory space, but each element in the array is null, i.e. does not refer to any object.

Step 2: Create an object and store it into an array

Next, we need to createPerson