e577. Enabling Antialiasing

// See e575 The Quintessential Drawing Program
    public void paint(Graphics g) {
        // Retrieve the graphics context; this object is used to paint shapes
        Graphics2D g2d = (Graphics2D)g;
    
        // Determine if antialiasing is enabled
        RenderingHints rhints = g2d.getRenderingHints();
        boolean antialiasOn = rhints.containsValue(RenderingHints.VALUE_ANTIALIAS_ON);
    
        // Enable antialiasing for shapes
        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                             RenderingHints.VALUE_ANTIALIAS_ON);
    
        // Disable antialiasing for shapes
        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                             RenderingHints.VALUE_ANTIALIAS_OFF);
    
        // Draw shapes...; see e586 Drawing Simple Shapes
    
        // Enable antialiasing for text
        g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
                             RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
    
        // Draw text...; see e591 Drawing Simple Text
    
        // Disable antialiasing for text
        g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
                             RenderingHints.VALUE_TEXT_ANTIALIAS_OFF);
    }

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