jodd-core/src/main/java/jodd/util/ArraysUtil.java
public static double[] values(Double[] array) {
		double[] dest = new double[array.length];
		for (int i = 0; i < array.length; i++) {
			Double v = array[i];
			if (v != null) {
				dest[i] = v.doubleValue();
			}
		}
		return dest;
	}
public static double[] values(Double[] array) {
		double[] dest = new double[array.length];
		for (int i = 0; i < array.length; i++) {
			Double v = array[i];
			if (v != null) {
				dest[i] = v.doubleValue();
			}
		}
		return dest;
	}
Converts to primitive array.