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Java.bigDecimal division in ruby ​​environment

I am right script in Ruby that include java classes

require 'java'
include_class 'java.math.BigDecimal'
include_class 'java.math.RoundingMode'

during script I need to split 2 java.bigDecimal

 one = BigDecimal.new("1")
 number1 = BigDecimal.new("3")
 number1 = one.divide(number1,RoundingMode.new(HALF_EVEN))

since i dont have intellisense in this IDE i am not sure if the syntax is correct and the runtime error is:

uninitialized constant :: HALF_EVEN

  • Am I combining java object in ruby ​​scrpit correctly?
  • How do I split two java.bigDecimal objects in ruby ​​env?
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2 answers


Try



number1 = one.divide(number1, RoundingMode::Half_EVEN)
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That would be RoundingMode.HALF_EVEN

in Java; it's RoundingMode::HALF_EVEN

in Ruby. You can also use constant overloading int

(i.e. BigDecimal::ROUND_HALF_EVEN

), but overloading is enum

definitely the way to go.

You can control the scale of the quotient with divide(BigDecimal divisor, int scale, RoundingMode mode)

overload.

Here's a Java snippet:

    BigDecimal one = BigDecimal.ONE;
    BigDecimal three = BigDecimal.valueOf(3);

    System.out.println(one.divide(three, 10, RoundingMode.DOWN));
    // prints "0.3333333333"

    System.out.println(one.divide(three, 10, RoundingMode.UP));
    // prints "0.3333333334"

    System.out.println(one.divide(three, 333, RoundingMode.UNNECESSARY));
    // throws java.lang.ArithmeticException: Rounding necessary


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