nd4j-common/src/main/java/org/nd4j/linalg/util/MathUtils.java
public static double normalize(double val, double min, double max) {
        if (max < min)
            throw new IllegalArgumentException("Max must be greather than min");

        return (val - min) / (max - min);
    }
public static double normalize(double val, double min, double max) {
        if (max < min)
            throw new IllegalArgumentException("Max must be greather than min");

        return (val - min) / (max - min);
    }
Normalize a value
(val - min) / (max - min)

@param val value to normalize
@param max max value
@param min min value
@return the normalized value