{"id":11002,"date":"2018-10-09T01:22:12","date_gmt":"2018-10-08T18:22:12","guid":{"rendered":"https:\/\/huongdanjava.com\/?p=11002"},"modified":"2018-10-09T01:22:12","modified_gmt":"2018-10-08T18:22:12","slug":"object-reference-variable-in-java","status":"publish","type":"post","link":"https:\/\/huongdanjava.com\/object-reference-variable-in-java.html","title":{"rendered":"Object reference variable in Java"},"content":{"rendered":"

In Java, we have two types of variables, the primitive variable and the object reference variable. The primitive we learned in the previous tutorials<\/a>, in this tutorial I will be with you to learn about the object reference variable and its difference with the primitive variable.<\/p>\n

What is the object reference variable?<\/h3>\n

Objects are instances of a class, which are created using the new operator, for example:<\/p>\n

Student student = new Student();<\/pre>\n
then a heap address in memory containing the data of that object is returned, and the value of this address is assigned to a variable, and this variable is called a reference variable, this object is called: an object is referenced.<\/p>\n
We can see the object reference variable as an object management object, which allows us to access the properties of that object.<\/p>\n
The default value of the reference variable is null if the variable is not assigned to any address of the object. That means, it is declared as follows:<\/p>\n
Student student;<\/pre>\n