java.lang.NumberFormatException: For input string: "a" at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)

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Root Cause Analysis

  1. java.lang.NumberFormatException

    For input string: "a" at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)

    at java.lang.Integer.parseInt()
  2. Java RT
    Integer.parseInt
    1. java.lang.Integer.parseInt(Integer.java:580)
    2. java.lang.Integer.parseInt(Integer.java:615)
    2 frames
  3. Unknown
    Main.main
    1. ReadWriteFile.readFile(patron.java:50)
    2. Main.main(Testingprogram.java:6)
    2 frames