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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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via Coderanch by Ranet Saed, 1 year ago
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java.lang.NumberFormatException: null at java.lang.Integer.parseInt(Integer.java:373) at java.lang.Integer.parseInt(Integer.java:454) at final_append.CopyBytes.main(CopyBytes.java:101)