Write a Java application that loads an XML document that contains the DTD in Fig. 8.19 as part of its internal subset. Use the XML document’s data to draw rectangles and circles with text inside them. Attributes x and y represent the top-left coordinates. Assume a circle is bounded by an imaginary rectangle. Attributes width and height represent the rectangle’s width and height and attribute radius is the circle’s radius. Validate your XML document(s) against the DTD.

Question

```
1 2
3
4 5 y CDATA #REQUIRED
6 width CDATA #REQUIRED
7 height CDATA #REQUIRED>
89

10 11 y CDATA #REQUIRED
12 radius CDATA #REQUIRED>
13 ]>
```

Answer 1

```

3

4 import java.awt.*;

5 import java.awt.event.*;

6 import javax.swing.*;

7 import java.io.*;

8

9import org.w3c.dom.*;

10 import org.xml.sax.*;

11 import javax.xml.parsers.*;

12 import com.sun.xml.tree.XmlDocument;

13

14 public class DrawShapes extends JFrame {

15 private InputSource input;

16 private Document document;

17

18 public DrawShapes( String file )

19 {

20 super( "My new drawing Application." );

21

22 try {

23

24 // obtain the default parser

25 DocumentBuilderFactory factory =

26 DocumentBuilderFactory.newInstance();

27 factory.setValidating( true );

28 DocumentBuilder builder = factory.newDocumentBuilder();

29

30 // set error handler for validation errors

31 builder.setErrorHandler( new MyErrorHandler() );

32

33 // obtain document object from XML document

34 document = builder.parse( new File( file ) );

35 }

36 catch ( SAXParseException spe ) {

37 System.err.println(

38 "Parse error: " + spe.getMessage() );

39 Sy