Thread: 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?

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");
        }
    }
}