if i divide a float value from 0 then i get output:- infinity and then throws NumberFormatException why
can anybody favour me.

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Please post the code where the NFE is thrown.

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now i dont hav NFE
why doesn't 2.0/0.0 throws ArithmeticException

Because that's what the Java definition requires. See the Java Language Specification section 15.17.2...

Division of a nonzero finite value by a zero results in a signed infinity.

NFE is about converting a String to a float, not about arithmetic.

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