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Task/Vector-products/Java/vector-products.java

@@ -0,0 +1,48 @@
+public class VectorProds{
+    public static class Vector3D<T extends Number>{
+        private T a, b, c;
+
+        public Vector3D(T a, T b, T c){
+            this.a = a;
+            this.b = b;
+            this.c = c;
+        }
+
+        public double dot(Vector3D<?> vec){
+            return (a.doubleValue() * vec.a.doubleValue() +
+                    b.doubleValue() * vec.b.doubleValue() +
+                    c.doubleValue() * vec.c.doubleValue());
+        }
+
+        public Vector3D<Double> cross(Vector3D<?> vec){
+            Double newA = b.doubleValue()*vec.c.doubleValue() - c.doubleValue()*vec.b.doubleValue();
+            Double newB = c.doubleValue()*vec.a.doubleValue() - a.doubleValue()*vec.c.doubleValue();
+            Double newC = a.doubleValue()*vec.b.doubleValue() - b.doubleValue()*vec.a.doubleValue();
+            return new Vector3D<Double>(newA, newB, newC);
+        }
+
+        public double scalTrip(Vector3D<?> vecB, Vector3D<?> vecC){
+            return this.dot(vecB.cross(vecC));
+        }
+
+        public Vector3D<Double> vecTrip(Vector3D<?> vecB, Vector3D<?> vecC){
+            return this.cross(vecB.cross(vecC));
+        }
+
+        @Override
+        public String toString(){
+            return "<" + a.toString() + ", " + b.toString() + ", " + c.toString() + ">";
+        }
+    }
+
+    public static void main(String[] args){
+        Vector3D<Integer> a = new Vector3D<Integer>(3, 4, 5);
+        Vector3D<Integer> b = new Vector3D<Integer>(4, 3, 5);
+        Vector3D<Integer> c = new Vector3D<Integer>(-5, -12, -13);
+
+        System.out.println(a.dot(b));
+        System.out.println(a.cross(b));
+        System.out.println(a.scalTrip(b, c));
+        System.out.println(a.vecTrip(b, c));
+    }
+}