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HomeJavajavaTutorialHow to list all classes, interfaces and enumerations in JShell in Java 9?

如何在Java 9的JShell中列出所有的类、接口和枚举?

The JShell tool introduced in Java 9 is also known as REPL(Read-Evaluate-Print-Loop)This allows us to execute Java code and get the results immediately. We can quickly evaluate expressions or short algorithms without having to create a new project, compile or build it. With JShell, we can execute expressions, use imports, define classes, methods and >variables.

We can list all classes , interfaces and enumerations using the "/types" command in Defined in the current JShell session.

In the following code snippet, we create the "Test" class, the "TestInterface" interface and the enumeration "EnumTest" in the JShell tool ".

<strong>C:\Users\User> jshell
| Welcome to JShell -- Version 9.0.4
| For an introduction type: /help intro

jshell> class Test {
...>       public static void main(String args[]) {
...>          System.out.println("TutorialsPoint");
...>       }
...>    }
| created class Test

jshell> interface TestInterface {
...>       public void sum();
...>    }
| created interface TestInterface

jshell> enum EnumTest {
...>       TUTORIALSPOINT,
...>       TUTORIX
...>    }
| created enum EnumTest</strong>

In the following code snippet, use the "/types" command to list all classes and interfaces and enumerations.

<strong>jshell> /types
|   class Test
|   interface TestInterface
|   enum EnumTest
</strong>
<strong>jshell></strong>

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