initial commit

src/uebung07/quantities/plain/Length.java

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+package quantities.plain;
+
+import static quantities.plain.LengthUnit.METER;
+import static quantities.plain.TimeUnit.SECOND;
+import static quantities.plain.VelocityUnit.METER_PER_SECOND;
+
+public class Length extends Quantity {
+    private final LengthUnit unit;
+
+    public Length(double value, LengthUnit unit) {
+        super(value, unit);
+        this.unit = unit;
+    }
+
+    public Length plus(Length other) {
+        return new Length(value + other.getBaseValue() / unit.baseFactor, unit);
+    }
+
+    public Length minus(Length other) {
+        return new Length(value - other.getBaseValue() / unit.baseFactor, unit);
+    }
+
+    public Length mult(double f) {
+        return new Length(value * f, unit);
+    }
+
+    public Length div(double f) {
+        return new Length(value / f, unit);
+    }
+
+    public Length to(LengthUnit unit) {
+        return new Length(getBaseValue() / unit.baseFactor, unit);
+    }
+
+    public double div(Length other) {
+        return getBaseValue() / other.getBaseValue();
+    }
+
+    public Velocity div(Time t) {
+        return new Velocity(this.value(METER) / t.value(SECOND), METER_PER_SECOND);
+    }
+
+    public Time div(Velocity v) {
+        return new Time(this.value(METER) / v.value(METER_PER_SECOND), SECOND);
+    }
+}

src/uebung07/quantities/plain/LengthUnit.java

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+package quantities.plain;
+
+public class LengthUnit extends Unit {
+    public LengthUnit(String name, double baseFactor) {
+        super(name, baseFactor);
+    }
+
+    public static final LengthUnit METER = new LengthUnit("m", 1);
+    public static final LengthUnit MILLIMETER = new LengthUnit("mm", 0.001);
+    public static final LengthUnit KILOMETER = new LengthUnit("km", 1000);
+    public static final LengthUnit MILE = new LengthUnit("mi", 1609.344);
+    public static final LengthUnit LIGHTYEAR = new LengthUnit("ly", 9460730472580800.0);
+    public static final LengthUnit PARSEC = new LengthUnit("pc", 3.0856776e16);
+}

src/uebung07/quantities/plain/PlainQuantitiesDemo.java

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+package uebung07.quantities.plain;
+
+import static uebung07.quantities.plain.LengthUnit.KILOMETER;
+import static uebung07.quantities.plain.LengthUnit.MILE;
+import static uebung07.quantities.plain.LengthUnit.MILLIMETER;
+import static uebung07.quantities.plain.LengthUnit.PARSEC;
+import static uebung07.quantities.plain.TimeUnit.HOUR;
+import static uebung07.quantities.plain.TimeUnit.MINUTE;
+import static uebung07.quantities.plain.TimeUnit.SECOND;
+import static uebung07.quantities.plain.VelocityUnit.KMH;
+import static uebung07.quantities.plain.VelocityUnit.METER_PER_SECOND;
+import static uebung07.quantities.plain.VelocityUnit.MPH;
+
+public class PlainQuantitiesDemo {
+    public static void main(String[] args) {
+        final Length l1 = new Length(1, KILOMETER);
+        final Length l2 = new Length(1200, MILLIMETER);
+        final Length l3 = new Length(1, MILE);
+
+        System.out.println(l1);
+        System.out.println(l2);
+        System.out.println(l1 + " + " + l2 + " = " + l1.plus(l2));
+        System.out.println(l1 + " + " + l2 + " (in mm) = " + l1.plus(l2).to(MILLIMETER));
+
+        System.out.println(l3 + " / " + l1 + " = " + l3.div(l1));
+
+        final Time t1 = new Time(100, SECOND);
+        final Time t2 = new Time(5, HOUR);
+
+        System.out.println(t1);
+        System.out.println(t2);
+        System.out.println(t1.plus(t2));
+        System.out.println(t1.plus(t2).to(MINUTE));
+
+        final Velocity v1 = new Velocity(12, KMH);
+        final Velocity v2 = new Velocity(100, METER_PER_SECOND);
+
+        System.out.println(v1);
+        System.out.println(v2);
+        System.out.println(v2.to(KMH));
+        System.out.println(v1.plus(v2));
+
+        final Length l4 = new Length(300, KILOMETER).to(PARSEC);
+        final Time t3 = new Time(2, HOUR);
+        final Velocity v3 = l4.div(t3);
+        System.out.println(l4 + " / " + l3 + " = " + v3);
+
+        System.out.println(v1 + " * " + t1 + " = " + v1.mult(t1).to(KILOMETER));
+
+        final Length l5 = v3.mult(t1.to(HOUR));
+        System.out.println(v3 + " * " + t1 + " = " + l5);
+
+        final Time t5 = l4.div(v2);
+        System.out.println(l4 + " / " + v2 + " = " + t5.to(MINUTE));
+
+        Velocity v5 = new Velocity(55, MPH);
+        System.out.println(v5 + " = " + v5.format("%4.1f %s", KMH));
+        System.out.println((v5.mult(new Time(30, MINUTE)).to(MILE)));
+    }
+}

src/uebung07/quantities/plain/Quantity.java

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+package uebung07.quantities.plain;
+
+public abstract class Quantity {
+    public final double value;
+    public final Unit unit;
+
+    protected Quantity(double value, Unit unit) {
+        this.value = value;
+        this.unit = unit;
+    }
+
+    public double getBaseValue() {
+        return value * unit.baseFactor;
+    }
+
+    public double value(Unit unit) {
+        return getBaseValue() / unit.baseFactor;
+    }
+
+    @Override
+    public String toString() {
+        return value + " " + unit;
+    }
+
+    public String format(String fmt, Unit unit) {
+        return String.format(fmt, value(unit), unit);
+    }
+}

src/uebung07/quantities/plain/Unit.java

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+package uebung07.quantities.plain;
+
+public abstract class Unit {
+    public final String name;
+    public final double baseFactor;
+
+    public Unit(String name, double baseFactor) {
+        this.name = name;
+        this.baseFactor = baseFactor;
+    }
+
+    @Override
+    public String toString() {
+        return name;
+    }
+}