如何在Java 9中重置JShell會話？

<strong>jshell> int a = 25
a ==> 25

jshell> double y = 30
y ==> 30.0

jshell> String str = "Tutorialspoint"
str ==> "Tutorialspoint"

jshell> /list

1 : int a = 25;
2 : double y = 30;
3 : String str = "Tutorialspoint";

jshell> /reset
| Resetting state.

jshell> /list

jshell> x
|  Error:
|  cannot find symbol
|    symbol: variable x
|  x
|  ^

jshell> str
|  Error:
|  cannot find symbol
|   symbol: variable str
|  str
|  ^-^

jshell> int x = 15
x ==> 15

jshell> String str = "reset"
str ==> "reset"

jshell> /list

  1 : int x = 15;
  2 : String str = "reset";</strong>