java BigDecimal 赋值运算符
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BigDecimal assign operator
提问by soField
I have a problem with assigning one big decimal value to another
我在将一个大十进制值分配给另一个时遇到问题
I am trying such as creating one temp big decimal and add 0 to another big decimal
我正在尝试创建一个临时大十进制并将 0 添加到另一个大十进制
BigDecimal temp = new BigDecimal(0);
dropStartValue = temp.add(newCounterValue);
However, I only want simply do the operation below on big decimals:
但是，我只想简单地对大数执行以下操作：
dropStartValue = newCounterValue
回答by Jon Skeet
You haven't specified the type of either dropStartValueor newCounterValue. If they're both BigDecimals, then this should be fine:
您尚未指定dropStartValue或的类型newCounterValue。如果它们都是 BigDecimals，那么这应该没问题：
dropStartValue = newCounterValue;
Note that although that's just making both variables refer to the same object, it's safe because BigDecimalitself is immutable.
请注意，虽然这只是让两个变量都指向同一个对象，但它是安全的，因为BigDecimal它本身是不可变的。
If that's not working for you, please give details of what problems you're seeing (exceptions? compile-time errors?).
如果这对您不起作用，请详细说明您看到的问题（例外？编译时错误？）。
回答by Romain
Assuming this is Java ans newCounterValue is an integer type or a box thereof, dropStartValue = new BigDecimal(newCounterValue);should do what you want.
假设这是 Java ans newCounterValue 是整数类型或其框，dropStartValue = new BigDecimal(newCounterValue);应该做你想做的。
