Java Shell (简称JShell) 是一个用于学习Java和原型化Java代码的REPL交互工具。它会评估输入的声明、语句和表达式，并立即打印出结果并从命令行运行。
封装是Java中的一个重要概念，用于确保“敏感”数据对用户隐藏。为了实现这一点，我们必须将类变量声明为私有，并提供公共访问get和set方法以及更新私有变量的值。
在下面的代码片段中，我们已经为Employee类实现了封装概念。
<strong>jshell> class Employee {
...> private String firstName;
...> private String lastName;
...> private String designation;
...> private String location;
...> public Employee(String firstName, String lastName, String designation, String location) {
...> this.firstName = firstName;
...> this.lastName = lastName;
...> this.designation = designation;
...> this.location = location;
...> }
...> 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</strong>在下面的代码片段中，我们创建了一个Employee类的实例，并打印出name、designation和location。
<strong>jshell> Employee emp = new Employee("Jai", "Adithya", "Content Developer", "Hyderabad");
emp ==> Name = Jai, Adithya | Job designation = Content Developer | location = Hyderabad.</strong>以上是如何在Java 9的JShell中实现封装概念？的详细内容。更多信息请关注PHP中文网其他相关文章！
