Object references
Variables that store the memory address of an object rather than the object itself.
Object references are like pointers in languages such as C++ or Golang, where variables can hold the address of primitive value or an object in memory.
Student student1 = new Student("Alice", 16);When you assign one object reference to another, both references point to the same object.
Changes made through one reference affect the object and are visible through other references.
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Paywall
(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.
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public class Student{ public String name; public int age; public Student(String nameIn, int ageIn){ this.name = nameIn; this.age = ageIn; } public static void main(String[] args){ Student student1 = new Student("Alice", 13); // initialise object System.out.println("student1 initial name: " + student1.name + ", age: " + student1.age); Student student2 = student1; // share reference System.out.println("student2 initial name: " + student2.name + ", age: " + student2.age); }}
public class Student{ public String name; public int age; public Student(String nameIn, int ageIn){ this.name = nameIn; this.age = ageIn; } public static void main(String[] args){ Student student1 = new Student("Alice", 13); // initialise object System.out.println("student1 initial name: " + student1.name + ", age: " + student1.age); Student student2 = student1; // share reference System.out.println("student2 initial name: " + student2.name + ", age: " + student2.age); // change student2 attributes student2.age = 16; student2.name = "Bob"; System.out.println("student2 new name: " + student2.name + ", age: " + student2.age); System.out.println("student1 new name: " + student1.name + ", age: " + student1.age); }}