Java program for transforming a positive integer into roman. I have the following code, but can't get it printing properly.

public String getRomanNumber(int number) return join("", nCopies (number, "I")) replace("IIII", "IV") replace("vV", "X") replace("VIV", "IX") replace("XXXXX", "L") replace("XXXX", "XL") replace("LL", "C") replace("LXL", "XC") replace("CCCCC", "D") replace("CCCC", "CD") replace("DD", "M") replace("DCD", "CM")