java.lang.NumberFormatException: d

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You try to parse a String that contains non-numeric characters to an int. The string must contain decimal characters only, optionally beginning with a + or - sign.

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java.lang.NumberFormatException: d
at java.lang.Integer.parseInt(Integer.java:414)
at java.lang.Integer.parseInt(Integer.java:463)
at undefined.CurrencyConversion.getUserInput(CurrencyConversion.java:43)
at undefined.CurrencyConversion.main(CurrencyConversion.java:101)

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