| // This example illustrates how C++ classes can be used from Java using SWIG. |
| // The Java class gets mapped onto the C++ class and behaves as if it is a Java class. |
| |
| public class main { |
| static { |
| try { |
| System.loadLibrary("example"); |
| } catch (UnsatisfiedLinkError e) { |
| System.err.println("Native code library failed to load. See the chapter on Dynamic Linking Problems in the SWIG Java documentation for help.\n" + e); |
| System.exit(1); |
| } |
| } |
| |
| public static void main(String argv[]) |
| { |
| // ----- Object creation ----- |
| |
| System.out.println( "Creating some objects:" ); |
| Circle c = new Circle(10); |
| System.out.println( " Created circle " + c ); |
| Square s = new Square(10); |
| System.out.println( " Created square " + s ); |
| |
| // ----- Access a static member ----- |
| |
| System.out.println( "\nA total of " + Shape.getNshapes() + " shapes were created" ); |
| |
| // ----- Member data access ----- |
| |
| // Notice how we can do this using functions specific to |
| // the 'Circle' class. |
| c.setX(20); |
| c.setY(30); |
| |
| // Now use the same functions in the base class |
| Shape shape = s; |
| shape.setX(-10); |
| shape.setY(5); |
| |
| System.out.println( "\nHere is their current position:" ); |
| System.out.println( " Circle = (" + c.getX() + " " + c.getY() + ")" ); |
| System.out.println( " Square = (" + s.getX() + " " + s.getY() + ")" ); |
| |
| // ----- Call some methods ----- |
| |
| System.out.println( "\nHere are some properties of the shapes:" ); |
| Shape[] shapes = {c,s}; |
| for (int i=0; i<shapes.length; i++) |
| { |
| System.out.println( " " + shapes[i].toString() ); |
| System.out.println( " area = " + shapes[i].area() ); |
| System.out.println( " perimeter = " + shapes[i].perimeter() ); |
| } |
| |
| // Notice how the area() and perimeter() functions really |
| // invoke the appropriate virtual method on each object. |
| |
| // ----- Delete everything ----- |
| |
| System.out.println( "\nGuess I'll clean up now" ); |
| |
| // Note: this invokes the virtual destructor |
| // You could leave this to the garbage collector |
| c.delete(); |
| s.delete(); |
| |
| System.out.println( Shape.getNshapes() + " shapes remain" ); |
| System.out.println( "Goodbye" ); |
| } |
| } |