Redondear números decimales en java

public class RoundDecimal { public static void main(String[] args) { Double number1 = 18.4738, number2 = 32.2890, number3 = 49.8801; Double r1 = roundDecimal(number1, 1); Double r2 = roundDecimal(number1, 2); Double r3 = roundDecimal(number2, 1); Double r4 = roundDecimal(number2, 2); Double r5 = roundDecimal(number3, 1); Double r6 = roundDecimal(number3, 2); System.out.println("r1 => " + r1); // r1 => 18.5 System.out.println("r2 => " + r2); // r2 => 18.47 System.out.println("r3 => " + r3); // r3 => 32.3 System.out.println("r4 => " + r4); // r4 => 32.29 System.out.println("r5 => " + r5); // r5 => 49.9 System.out.println("r6 => " + r6); // r6 => 49.88 } private static double roundDecimal(double valorInicial, int numeroDecimales) { double parteEntera = Math.floor(valorInicial); valorInicial=(valorInicial-parteEntera)*Math.pow(10, numeroDecimales); valorInicial=Math.round(valorInicial); valorInicial=(valorInicial/Math.pow(10, numeroDecimales))+parteEntera; return valorInicial; } }