java.lang.NumberFormatException: null
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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.
Can occur when you try to convert a String to a numeric value but the String is not well formatted for the conversion.
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, 2 years agojava.lang.NumberFormatException: null
at java.lang.Integer.parseInt(Integer.java:542)
at java.lang.Integer.parseInt(Integer.java:615)
at Social.toString(Social.java:46)
at java.lang.String.valueOf(String.java:2994)
at java.io.PrintStream.println(PrintStream.java:821)
at SocialRunner.main(SocialRunner.java:20)