การนำ Encapsulation ไปใช้ใน JShell Java 9

Encapsulation ซ่อนข้อมูลสำคัญ ทำตัวแปร private ให้ getter/setter public

ตัวอย่างใน JShell

jshell> class Employee {
   private String firstName, lastName, designation, location;
   
   public Employee(String fn, String ln, String desig, String loc) {
       this.firstName = fn; this.lastName = ln;
       this.designation = desig; this.location = loc;
   }
   
   public String getFirstName() { return firstName; }
   public String getLastName() { return lastName; }
   public String getJobDesignation() { return designation; }
   public String getLocation() { return location; }
   
   public String toString() {
       return "Name = " + firstName + ", " + lastName + " | " +
              "Job designation = " + designation + " | " +
              "location = " + location + ".";
   }
}
| created class Employee

jshell> Employee emp = new Employee("Jai", "Adithya", "Content Developer", "Hyderabad")
emp ==> Name = Jai, Adithya | Job designation = Content Developer | location = Hyderabad.

ตัวแปร private เข้าถึงได้เฉพาะผ่าน getter methods