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  1. JDK
  2. JDK-8235251

jshell: System.in does not work inside a script file

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    • Subcomponent:
    • CPU:
      x86_64
    • OS:
      generic

      Description

      A DESCRIPTION OF THE PROBLEM :
      While System.in works from a snippet entered directly at the jshell prompt, it does not work from inside a script file loaded using /open or on the command line. Specifically, when calling System.in.read() from inside a script file, it returns -1 (end of file) without waiting for input from the user.

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      Create a script file test.jsh containing the statement

      System.out.println(System.in.read());

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      jshell blocks until a line of text is entered and then prints the ASCII code of the first character.
      ACTUAL -
      jshell does not block; it prints -1 (indicating end of file) and shows a prompt.

      ---------- BEGIN SOURCE ----------
      See above
      ---------- END SOURCE ----------

      FREQUENCY : always


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            Assignee:
            rfield Robert Field
            Reporter:
            webbuggrp Webbug Group
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              Created:
              Updated: