Java and Database Connectivity

A bit about syntax: declaring a method

    /** just a blob round my end position */
    public void paint( Graphics g)
    {
        g.setColor( colour);

        g.fillOval( end.x - radius, end.y - radius, 
            2 * radius, 2 * radius);
    }

• Methods are the way we describe the behaviour of objects. Here is a methd called paint which describes how a BlobHand paints itself on a Graphics object.
  • It calls a method setColor of the Graphics object to set the colour it wants.
  • It calls a method fillOval of the Graphics object to draw a filled circle at its end position
• public means that any other object can call this method
• void means that this method doesn't return any value

Full text of this presentation | Table of Contents | No Frames Author: Simon Brooke | Copyright © 2001 Simon Brooke Slide 35 of 95

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