'BigDecimal.divide()' called without a rounding mode argument

Condition `current == '\n'` is always `true` when reached

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Dereference of `right` may produce `NullPointerException`

Dereference of `left` may produce `NullPointerException`

Dereference of `created` may produce `NullPointerException`

Argument `nearest.key` might be null

`equals()` should check the class of its parameter

String concatenation `+=` in loop

String concatenation `+=` in loop

String values are compared using `==`, not 'equals()'

`if` statement can be simplified

The value `true` assigned to `floating` is never used