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  1. ,

    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.

  2. ,

    Can occur when you try to convert a String to a numeric value but the String is not well formatted for the conversion.

Solutions on the web

via Coderanch by Jeff Verdegan, 1 year ago
via Coderanch by Paresh Nayak, 1 year ago
via Eclipse Bugzilla by dj.houghton, 1 year ago
via Stack Overflow by Bad Coder
, 2 years ago
via Stack Overflow by Leejoy
, 2 years ago
via Stack Overflow by KIRAN BAKTHA
, 1 year ago
java.lang.NumberFormatException: For input string: "2*4"	at java.lang.NumberFormatException.forInputString(Unknown Source)	at java.lang.Integer.parseInt(Unknown Source)	at java.lang.Integer.parseInt(Unknown Source)	at RandomOperation.main(RandomOperation.java:30)