If you need to represent fixed point Numbers, such as dollars and cents, use BigDecimal instead.

如果需要表示定点数(譬如，几美元和几美分)，则使用BigDecimal。

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SQL-92 includes a decimal data type, which is an exact numeric type for representing fixed point decimal Numbers and performs basic arithmetic operation on decimal Numbers.

SQL - 92包括DECIMAL数据类型，它是用于表示定点小数的精确数字类型，它可以对小数进行基本的算术运算。

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In Listing 2, I reopen the Numeric class (which handles both fixed and floating-point Numbers) to add the gram and pound methods.

在清单2中，我重新打开了numeric类(其处理固定和浮点数字)以便添加gram和pound方法。

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