Release version 0.5.0 (merge into stable)

1 files changed, 33 insertions, 15 deletions

diff --git a/src/main/java/sevenUnits/unit/UnitPrefix.java b/src/main/java/sevenUnits/unit/UnitPrefix.java
index e1f7788..9035969 100644
--- a/src/main/java/sevenUnits/unit/UnitPrefix.java
+++ b/src/main/java/sevenUnits/unit/UnitPrefix.java
@@ -40,7 +40,7 @@ public final class UnitPrefix implements Nameable {
 	public static UnitPrefix valueOf(final double multiplier) {
 		return new UnitPrefix(multiplier, NameSymbol.EMPTY);
 	}
-	
+
 	/**
 	 * Gets a {@code UnitPrefix} from a multiplier and a name
 	 * 
@@ -55,21 +55,21 @@ public final class UnitPrefix implements Nameable {
 		return new UnitPrefix(multiplier,
 				Objects.requireNonNull(ns, "ns must not be null."));
 	}
-	
+
 	/**
 	 * This prefix's name(s) and symbol.
 	 * 
 	 * @since 2022-04-16
 	 */
 	private final NameSymbol nameSymbol;
-	
+
 	/**
 	 * The number that this prefix multiplies units by
 	 * 
 	 * @since 2019-10-16
 	 */
 	private final double multiplier;
-	
+
 	/**
 	 * Creates the {@code DefaultUnitPrefix}.
 	 * 
@@ -81,7 +81,7 @@ public final class UnitPrefix implements Nameable {
 		this.multiplier = multiplier;
 		this.nameSymbol = ns;
 	}
-	
+
 	/**
 	 * Divides this prefix by a scalar
 	 * 
@@ -92,7 +92,7 @@ public final class UnitPrefix implements Nameable {
 	public UnitPrefix dividedBy(final double divisor) {
 		return valueOf(this.getMultiplier() / divisor);
 	}
-	
+
 	/**
 	 * Divides this prefix by {@code other}.
 	 * 
@@ -104,7 +104,7 @@ public final class UnitPrefix implements Nameable {
 	public UnitPrefix dividedBy(final UnitPrefix other) {
 		return valueOf(this.getMultiplier() / other.getMultiplier());
 	}
-	
+
 	/**
 	 * {@inheritDoc}
 	 * 
@@ -122,7 +122,7 @@ public final class UnitPrefix implements Nameable {
 		return DecimalComparison.equals(this.getMultiplier(),
 				other.getMultiplier());
 	}
-	
+
 	/**
 	 * @return prefix's multiplier
 	 * @since 2019-11-26
@@ -130,12 +130,12 @@ public final class UnitPrefix implements Nameable {
 	public double getMultiplier() {
 		return this.multiplier;
 	}
-	
+
 	@Override
 	public NameSymbol getNameSymbol() {
 		return this.nameSymbol;
 	}
-	
+
 	/**
 	 * {@inheritDoc}
 	 * 
@@ -145,7 +145,7 @@ public final class UnitPrefix implements Nameable {
 	public int hashCode() {
 		return DecimalComparison.hash(this.getMultiplier());
 	}
-	
+
 	/**
 	 * Multiplies this prefix by a scalar
 	 * 
@@ -156,7 +156,25 @@ public final class UnitPrefix implements Nameable {
 	public UnitPrefix times(final double multiplicand) {
 		return valueOf(this.getMultiplier() * multiplicand);
 	}
-	
+
+	/**
+	 * Adds {@code other} to this prefix and returns the result.
+	 * 
+	 * @since 2024-03-03
+	 */
+	public UnitPrefix plus(final UnitPrefix other) {
+		return valueOf(this.getMultiplier() + other.getMultiplier());
+	}
+
+	/**
+	 * Subtracts {@code other} from this prefix and returns the result.
+	 * 
+	 * @since 2024-03-03
+	 */
+	public UnitPrefix minus(final UnitPrefix other) {
+		return valueOf(this.getMultiplier() - other.getMultiplier());
+	}
+
 	/**
 	 * Multiplies this prefix by {@code other}.
 	 * 
@@ -168,7 +186,7 @@ public final class UnitPrefix implements Nameable {
 	public UnitPrefix times(final UnitPrefix other) {
 		return valueOf(this.getMultiplier() * other.getMultiplier());
 	}
-	
+
 	/**
 	 * Raises this prefix to an exponent.
 	 * 
@@ -180,7 +198,7 @@ public final class UnitPrefix implements Nameable {
 	public UnitPrefix toExponent(final double exponent) {
 		return valueOf(Math.pow(this.getMultiplier(), exponent));
 	}
-	
+
 	/**
 	 * @return a string describing the prefix and its multiplier
 	 */
@@ -195,7 +213,7 @@ public final class UnitPrefix implements Nameable {
 		else
 			return String.format("Unit Prefix (\u00D7 %s)", this.multiplier);
 	}
-	
+
 	/**
 	 * @param ns name(s) and symbol to use
 	 * @return copy of this prefix with provided name(s) and symbol