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How to set JShell's verbose mode in Java 9?

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2023-08-27 08:29:05773browse

如何在Java 9中设置JShell的详细模式?

JShell 是在Java 9中引入的REPL 工具。我们可以使用这个工具在命令行提示符中执行简单的代码片段。

当我们在JShell中输入算术表达式变量等时,它会显示结果,但不会显示创建的变量的类型详细信息。在JShell中可以使用详细模式显示更多关于输入命令执行的信息。我们需要使用命令/set feedback verbose(命令前面可以加/)来获取更多关于执行的命令的信息。

在下面的代码片段中,详细模式已经打开,它可以显示更多关于变量类型的信息。

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

jshell> /set feedback verbose
| Feedback mode: verbose

jshell> 5.0 * 8
$1 ==> 40.0
| created scratch variable $1 : double

jshell> String str = "TutorialsPoint";
str ==> "TutorialsPoint"
| created variable str : String

jshell> void test() {
...> System.out.println("Tutorix");
...> }
| created method test()

jshell> test()
Tutorix

jshell> String str1 = new String("Tutorix");
str1 ==> "Tutorix"
| created variable str1 : String

jshell> "TutorialsPoint" + "Tutorix" + 2019
$6 ==> "TutorialsPointTutorix2019"
| created scratch variable $6 : String

jshell> int test1() {
...> return 10;
...> }
| created method test1()

jshell> test1()
$8 ==> 10
| created scratch variable $8 : int
</strong>

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