Method: parseDetail(String, String, String)

1: package util.fractionStyles;
2:
3: import util.Fraction;
4:
5: import java.math.BigInteger;
6: import java.util.Objects;
7:
8: /**
9: * Singleton, welcher den Fraction-Styl Science repräsentiert. Z.B. irgendwas mit E
10: */
11: public final class Science implements FractionStyle {
12:
13: private static Science instance;
14:
15: private Science() {
16: // Singleton
17: }
18:
19: /**
20: * Singletonklasse.
21: * @return das Singletonobjekt der Klasse.
22: */
23: public static Science getInstance() {
24: if (Objects.isNull(Science.instance)) {
25: Science.instance = new Science();
26: }
27: return Science.instance;
28: }
29:
30:
31: @Override
32: public Fraction parseDetail(final String fractionAsString, final String frontPart, final String rearPart) {
33:• if (rearPart.substring(0, 1).equals("-")) {
34: return Fraction
35: .create(new BigInteger(frontPart), BigInteger.TEN.pow(Integer.parseInt(rearPart.substring(1))));
36: } else {
37: return Fraction.create(
38: new BigInteger(frontPart).multiply(BigInteger.TEN.pow(Integer.parseInt(rearPart))),
39: BigInteger.ONE);
40: }
41: }
42: }