added uebung07 angabe

uebung07/src/quantities/plain/Quantity.java

@@ -0,0 +1,28 @@
+package 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);
+    }
+}