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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