Spec for javax.swing.text.changeHighlight(Object, int , int ) says:
"@exception BadLocationException for an invalid range specification"

Exception is not always throw when expected.

Platform: Windows, Solaris
JCK: runtime 7 b03
JDK: 6, 7

The following test fails:
api/javax_swing/text/Highlighter/index.html#Highlighter[Highlighter006]

Please see code extract from the test:
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import javax.swing.*;
import javax.swing.text.BadLocationException;
import javax.swing.text.Highlighter;
import javax.swing.text.JTextComponent;
import java.awt.*;

public class H006 {

    private static void runTest() {
        JFrame jFrame = new JFrame();
        JTextArea textArea = new JTextArea("Tested string");
        jFrame.getContentPane().add(textArea);
        jFrame.setVisible(true);
        Highlighter highlighter = textArea.getHighlighter();
        Highlighter.HighlightPainter myPainter = new Highlighter.HighlightPainter() {
            public void paint(Graphics g, int p0, int p1, Shape bounds, JTextComponent c) {}
        };

        int negativeTestedData[][] = {{50, 0}, {-1, 1}, {-5, -4},
                                      {Integer.MAX_VALUE, Integer.MIN_VALUE},
                                      {Integer.MIN_VALUE, Integer.MAX_VALUE},
                                      {Integer.MIN_VALUE, Integer.MIN_VALUE}};
        String errorMessage4Negative = "";
        for (int i = 0; i < negativeTestedData.length; i++) {
            try {
                Object objRef = highlighter.addHighlight(0, 1, myPainter);
                highlighter.changeHighlight(objRef, negativeTestedData[i][0], negativeTestedData[i][1]);
            } catch (BadLocationException e) {
                continue;
            }
            errorMessage4Negative += "(" + negativeTestedData[i][0] + ", " + negativeTestedData[i][1] + ") ";
        }

        System.out.println("Method addHighlight() does not throw BadLocationException for \n" + errorMessage4Negative + ".");
        jFrame.dispose();
    }

    public static void main(String[] args) throws Exception {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                runTest();
            }
        });
    }
}
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