Simple vector calculation

Java/VectorCalculations.java

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+/**
+ * VectorCalculations.java
+ * This programm contains methods related to simple vector calculations.
+ *
+ * @author Abenezer Adane
+ */
+
+public class VectorCalculations {
+
+	public static class Vector3D {
+		private int x, y, z;
+
+		public Vector3D(int x, int y, int z){
+			this.x = x;
+			this.y = y;
+			this.z = z;
+		}
+
+		public int getX(){
+			return this.x;
+		}
+
+		public void setX(int x){
+			this.x = x;
+		}
+
+		public int getY(){
+			return this.y;
+		}
+
+		public void setY(int y){
+			this.y = y;
+		}
+
+		public int getZ(){
+			return this.z;
+		}
+
+		public void setZ(int z){
+			this.z = z;
+		}
+
+		public String toString(){
+			return "<" + getX() + ", " + getY() + ", " + getZ() + ">";
+		}
+	}
+
+	/* This is a 2-Dimentional Vector object */
+	public static class Vector2D {
+		private int x, y;
+
+		public Vector2D(int x, int y){
+			this.x = x;
+			this.y = y;
+		}
+
+		public int getX(){
+			return this.x;
+		}
+
+		public void setX(int x){
+			this.x = x;
+		}
+
+		public int getY(){
+			return this.y;
+		}
+
+		public void setY(int y){
+			this.y = y;
+		}
+
+		public String toString(){
+			return "<" + getX() + ", " + getY() + ">";
+		}
+	}
+
+	/* This method calculates the sum of two 2D vectors */
+	public static Vector2D addition2D(Vector2D a, Vector2D b) {
+		return new Vector2D((a.getX() + b.getX()), (a.getY() + b.getY()));
+	}
+
+	/* This method calculates the difference of two 2D vectors */
+	public static Vector2D subtraction2D(Vector2D a, Vector2D b) {
+		return new Vector2D((a.getX() - b.getX()), (a.getY() - b.getY()));
+	}
+
+	/* This method calculates the sum of two 3D vectors */
+	public static Vector3D addition3D(Vector3D a, Vector3D b) {
+		return new Vector3D((a.getX() + b.getX()), (a.getY() + b.getY()), (a.getZ() + b.getZ()));
+	}
+
+	/* This method calculates the difference of two 3D vectors */
+	public static Vector3D subtraction3D(Vector3D a, Vector3D b) {
+		return new Vector3D((a.getX() - b.getX()), (a.getY() - b.getY()), (a.getZ() - b.getZ()));
+	}
+
+	/* This method calculates the dot product of two 2D vectors */
+	public static int dotProduct2D(Vector2D a, Vector2D b){
+		return ((a.getX() * b.getX()) + (a.getY() * b.getY()));
+	}
+
+	/* This method calculates the dot product of two 3D vectors */
+	public static int dotProduct3D(Vector3D a, Vector3D b){
+		return ((a.getX() * b.getX()) + (a.getY() * b.getY()) + (a.getZ() * b.getZ()));
+	}
+
+	/* This method returns the cross product of two vectors */
+	public static Vector3D crossProduct(Vector3D a, Vector3D b){
+		return new Vector3D(((a.getY() * b.getZ()) - (a.getZ() * b.getY())),
+							((a.getZ() * b.getX()) - (a.getX() * b.getZ())),
+							((a.getX() * b.getY()) - (a.getY() * b.getX())));
+	}
+}