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Thread: How do you compare Doubles numerically?

  1. #1
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    Default How do you compare Doubles numerically?

    if you are converting strings to Doubles by using Double.parseDouble(string), how can you compare them numerically ( >, <, ==) with other Doubles? Is there a way to convert Doubles to primitive doubles?


  2. #2
    Super Moderator pbrockway2's Avatar
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    Default Re: How do you compare Doubles numerically?

    Have a look at the API docs.

    how can you compare them numerically
    compareTo()

    Is there a way to convert Doubles to primitive doubles?
    doubleValue(). Also the conversion (called unboxing) will often just happen:

    public class DoubleComp {
        public static void main(String[] args) {
            Double first = new Double("666");
            Double second = new Double("3.14159");
                // the comparisons use auto unboxing
            if(first > second) {
                System.out.println("bigger");
            } else if(first < second) {
                System.out.println("smaller");
            } else {
                System.out.println("more or less equal");
            }
        }
    }

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