Java 9 introduced an interactive REPL (Read-Evaluate-Print-Loop) tool: JShell, and it allows us to execute code snippets and get an immediate result. A snippet is an instruction that can use standard Java syntax. It represents a single expression, statement, or declaration.
Below are some of the rules we need to follow while using the JShell tool.
In the below sample code snippet, we have created Employee class with necessary getter methods and instantiate it using the new operator.
jshell> class Employee { ...> private String firstName; ...> private String lastName; ...> private String designation; ...> public Employee(String firstName, String lastName, String designation) { ...> this.firstName = firstName; ...> this.lastName = lastName; ...> this.designation = designation; ...> } ...> public String getFirstName() { ...> return firstName; ...> } ...> public String getLastName() { ...> return lastName; ...> } ...> public String getDesignation() { ...> return designation; ...> } ...> public String toString() { ...> return "Name = " + firstName + ", " + lastName + " | " + ...> "designation = " + designation; ...> } ...> } | created class Employee jshell> Employee emp = new Employee("Sai", "Adithya", "Content Developer"); emp ==> Name = Sai, Adithya | designation = Content Developer