How to cast numbers (like int) to “Number”?

问题

This could be basic question but I could not find something useful.

Question is: How to convert double or int value to Number type ( to be more specific oracle.jbo.domain.Number)

I tried the following:

for integer values

         int i=9;
         Integer y=new Integer(i);
         oracle.jbo.domain.Number num=(oracle.jbo.domain.Number)y;

for float values

         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:

Type 'oracle.jbo.domain.Number' incompatible with 'java.lang.Integer'

and

Type 'oracle.jbo.domain.Number' incompatible with 'java.lang.Double'

if the conversion did not work, then how to simply create Number object in java

回答1:

You do not need to cast it. just use constructor of Number class.

int value = 5;
oracle.jbo.domain.Number num = new oracle.jbo.domain.Number(value);

回答2:

Take a look at documentation. You can construct new Number objects like so:

Number dNumber = new Number(9.5);
Number iNumber = new Number(9);

来源：https://stackoverflow.com/questions/23320267/how-to-cast-numbers-like-int-to-number