java.lang.NumberFormatException: For input string: ""

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    java.lang.NumberFormatException: For input string: ""

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Root Cause Analysis

  1. java.lang.NumberFormatException

    For input string: ""

    at java.lang.NumberFormatException.forInputString()
  2. Java RT
    Integer.parseInt
    1. java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
    2. java.lang.Integer.parseInt(Integer.java:504)
    3. java.lang.Integer.parseInt(Integer.java:527)
    3 frames
  3. edu.umsl.mis3806
    Grades.main
    1. edu.umsl.mis3806.KbdInput.readInt(KbdInput.java:11)
    2. edu.umsl.mis3806.Grades.main(Grades.java:25)
    2 frames