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In Number interface: remove one and zero (they can't be static), add compareTo and signum. Modify NaiveNumber accordingly.

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This commit is contained in:
Arthur Drobot 2017-07-25 11:09:23 -07:00
parent 3b91304175
commit 254276b2af
2 changed files with 11 additions and 7 deletions
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13
src/org/nwapw/abacus/number/NaiveNumber.java Normal file → Executable file
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@ -8,6 +8,9 @@ public class NaiveNumber implements Number {
this.value = value; this.value = value;
} }
static final NaiveNumber ZERO = new NaiveNumber(0);
static final NaiveNumber ONE = new NaiveNumber(1);
@Override @Override
public int precision() { public int precision() {
return 4; return 4;
@ -39,13 +42,14 @@ public class NaiveNumber implements Number {
} }
@Override @Override
public Number zero() { public int compareTo(Number number) {
return new NaiveNumber(0); NaiveNumber num = (NaiveNumber) number;
return Double.compare(value, num.value);
} }
@Override @Override
public Number one() { public int signum() {
return new NaiveNumber(1); return this.compareTo(ZERO);
} }
@Override @Override
@ -53,5 +57,6 @@ public class NaiveNumber implements Number {
if(toClass == this.getClass()) return this; if(toClass == this.getClass()) return this;
return null; return null;
} }
} }

5
src/org/nwapw/abacus/number/Number.java
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@ -8,9 +8,8 @@ public interface Number {
Number add(Number summand); Number add(Number summand);
Number subtract(Number subtrahend); Number subtract(Number subtrahend);
Number negate(); Number negate();
int compareTo(Number number);
Number zero(); int signum();
Number one();
Number promoteTo(Class<? extends Number> toClass); Number promoteTo(Class<? extends Number> toClass);