1.2 XML Processing

<..svg into java graphics ..>

if( QName.equals( "rect" ) ){
     g.setColor( Color.getColor( atts.getValue("fill") ));
     g.fillRect(
       Integer.getInteger( atts.getValue( "x"    )).intValue(),
       Integer.getInteger( atts.getValue( "y"    )).intValue(),
       Integer.getInteger( atts.getValue("width" )).intValue(),
       Integer.getInteger( atts.getValue("height")).intValue()
     );
} else if( QName.equals( "circle" ) ){
     g.setColor( Color.getColor( atts.getValue("fill") ));
     int r = Integer.getInteger( atts.getValue("r")).intValue();
     g.fillRect(
       Integer.getInteger( atts.getValue( "cx" )).intValue() - r,
       Integer.getInteger( atts.getValue( "cy" )).intValue() - r,
       2*r, 2*r
     );
}

-_-_-

<..MySVGBrowser.java ..>

import javax.xml.parsers.*;
import org.xml.sax.XMLReader;
import java.io.File;
import org.xml.sax.Attributes;
import org.xml.sax.helpers.DefaultHandler;

import java.awt.*;
import javax.swing.*;

class MySVGBrowser {
   static public void main(String[] args) {
     new WebPage( args[0]);
} }

class MyContentHandler extends DefaultHandler {
      Graphics g;

   MyContentHandler(Graphics g){ this.g = g; }

   public void startElement(String namespace, String localName,
                             String QName, Attributes atts) {
     <.svg into java graphics .>
   }
}

class WebPage  extends JFrame {
      String fileName;

    WebPage ( String fileName) {
      this.fileName = fileName;
      setSize(200,200); setVisible(true);
    }
    public void paint(Graphics g) {
      try{
         SAXParserFactory factory = SAXParserFactory.newInstance();
         factory.setNamespaceAware( true );
         SAXParser saxParser = factory.newSAXParser();
         XMLReader xmlReader = saxParser.getXMLReader();
         xmlReader.setContentHandler( new MyContentHandler(g) );
         xmlReader.parse( new File(fileName).toURL().toString() );
      } catch( Exception  e ){}
    }
}

-_-_-

<..JavaPaint.java ..>

import java.awt.*;
import javax.swing.*;

class JavaPaint {
    public static void main(String args[]) {
      new Pic();
    }
}
class Pic extends JFrame {
    Pic() { setSize(200,200); setVisible(true); }
    public void paint(Graphics g) {
       g.fillRect(0, 0, 50, 60);
    }
}

-_-_-