public class Interest { public static void main(String[] args) { Decimal2f principal = Decimal2f.valueOf(9500); Decimal3f rate = Decimal3f.valueOf(0.067); Decimal2f time = Decimal2f.valueOf(1).divide(4); Decimal2f interest = principal.multiplyBy(rate.multiplyExact(time)); System.out.println("First quarter interest: $" + interest);	} }

public class Circle { public static void main(String[] args) { Decimal18f PI = Decimal18f.valueOf(Math.PI); Decimal2f radius = Decimal2f.valueOf(5); Decimal2f circ = radius.multiplyBy(PI.multiply(2)); System.out.println("Circumference with 5m radius is ~" + circ + "m"); System.out.println("Circumference with 5m radius is ~" + (2*Math.PI * 5) + "m"); Decimal2f down = radius.multiplyBy(PI.multiply(2), RoundingMode.DOWN); System.out.println("Circumference with 5m radius is larger than " + down + "m");	} }

public class MeanStdDev { /* Random generator*/ private static final Random RND = new Random(); /* Sample count*/ private static final int N = 10000; /* Expected sample mean*/ private static final Decimal10f EXP_MEAN = Decimal10f.valueOf(0); public static void main(String[] args) { MutableDecimal10f mean = new MutableDecimal10f(); MutableDecimal10f var = new MutableDecimal10f(); for (int i = 0; i < N; i++) { double value = RND.nextGaussian(); mean.add(value); var.addSquared(EXP_MEAN.subtract(value));	} System.out.println("Mean: " + mean.divide(N)); System.out.println("Variance: " + var.divide(N)); System.out.println("StdDev: " + var.sqrt());	} }

public class Add { public static void main(String[] args) { Decimal2f a = Decimal2f.valueOf(4); Decimal2f b = Decimal2f.valueOf(1.5); Decimal3f c = Decimal3f.valueOf(0.125); Decimal3f d = Decimal3f.valueOf(0.5); System.out.println("ADD: values with same scale"); Decimal2f sumAB = a.add(b); Decimal3f sumCD = c.add(d); System.out.println("a+b = " + sumAB); System.out.println("c+d = " + sumCD); System.out.println("ADD: values with different scales"); Decimal2f sumAC = a.add(c, RoundingMode.HALF_UP); Decimal3f sumCA = c.add(a, RoundingMode.UNNECESSARY); System.out.println("a+c = " + sumAC); System.out.println("c+a = " + sumCA);	} }

public class Multiply { public static void main(String[] args) { Decimal2f a = Decimal2f.valueOf(4); Decimal2f b = Decimal2f.valueOf(1.5); Decimal3f c = Decimal3f.valueOf(0.125); Decimal3f d = Decimal3f.valueOf(0.5); System.out.println("MULTIPLY: values with same scale"); Decimal2f productAB = a.multiply(b); Decimal3f productCD = c.multiply(d); Decimal3f downCD = c.multiply(d, RoundingMode.DOWN); System.out.println("a*b = " + productAB); System.out.println("c*d = " + productCD); System.out.println("c*d = " + downCD); System.out.println("MULTIPLY: values with different scales"); Decimal2f productAC = a.multiplyBy(c); Decimal2f productBC = b.multiplyBy(c); Decimal2f productBD = b.multiplyBy(d); Decimal3f productCA = c.multiplyBy(a); System.out.println("a*c = " + productAC); System.out.println("b*c = " + productBC); System.out.println("b*d = " + productBD); System.out.println("c*a = " + productCA); System.out.println("MULTIPLY: exact multiplication"); Decimal<?> exactCD = c.multiplyExact(d); Decimal6f typedCD = c.multiplyExact().by(d); Decimal5f typedAD = a.multiplyExact().by(d); System.out.println("c*d = " + exactCD); System.out.println("c*d = " + typedCD); System.out.println("a*d = " + typedAD);	} }

public class Sqrt { public static void main(String[] args) { System.out.println("sqrt(2)=" + Decimal18f.TWO.sqrt()); System.out.println("sqrt(2)=" + Math.sqrt(2));	} }

public class Pi { public static void main(String[] args) { Decimal17f a = Decimal17f.ONE; Decimal17f b = Decimal17f.TWO.sqrt().shiftRight(1);//1/sqrt(2) == sqrt(2)/2 Decimal17f t = Decimal17f.ONE.divide(4); Decimal17f p = Decimal17f.ONE; for (int i = 0; i < 3; i++) { System.out.println("step " + (i+1) + ": " + pi(a, b, t, p)); Decimal17f an = a.avg(b); Decimal17f bn = a.multiply(b).sqrt(); Decimal17f tn = t.subtract(p.multiply(a.subtract(an).square())); Decimal17f pn = p.shiftLeft(1); a = an; b = bn; t = tn; p = pn;	} System.out.println("RESULT: " + pi(a, b, t, p)); System.out.println("DOUBLE: " + Math.PI);	} private static Decimal<?> pi(Decimal17f a, Decimal17f b, Decimal17f t, Decimal17f p) { return a.add(b).square().divide(t).shiftRight(2);	} }