Java 如何将数字（如 int）转换为“数字”？
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How to cast numbers (like int) to "Number"?
提问by Salman
This could be basic question but I could not find something useful.
这可能是基本问题，但我找不到有用的东西。
Question is: How to convert doubleor intvalue to Numbertype ( to be more specific oracle.jbo.domain.Number)
问题是：如何转换double或int值到Number类型（更具体oracle.jbo.domain.Number）
I tried the following:
我尝试了以下方法：
for integer values
对于整数值
int i=9;
Integer y=new Integer(i);
oracle.jbo.domain.Number num=(oracle.jbo.domain.Number)y;
for float values
对于浮点值
double i=9.5;
Double y=new Double(i);
oracle.jbo.domain.Number num=(oracle.jbo.domain.Number)y;
But I always get incompatible types error in both cases:
但在这两种情况下，我总是遇到不兼容的类型错误：
Type 'oracle.jbo.domain.Number' incompatible with 'java.lang.Integer'
and
和
Type 'oracle.jbo.domain.Number' incompatible with 'java.lang.Double'
if the conversion did not work, then how to simply create Numberobject in java
如果转换不起作用，那么如何Number在java中简单地创建对象
采纳答案by Braj
回答by aga
Take a look at documentation. You can construct new Numberobjects like so:
查看文档。您可以Number像这样构造新对象：
Number dNumber = new Number(9.5);
Number iNumber = new Number(9);
