Name: aaC67449 Date: 06/04/99



JTableHeader's getAccessibleChild() and getAccessibleAt() methods throw
unexpected NullPointerException. The reson of the bug is the
changed behavior of the TableColumn.getHeaderRenderer(). It can return null now.



---------------- example ---------------
import javax.accessibility.*;
import javax.swing.table.*;

public class Test {
 
   public static void main(String argv[]) {
       JTableHeader header = new JTableHeader();
       header.getColumnModel().addColumn(new TableColumn(0));

       // create AccessibleJTableHeader object
       AccessibleContext c = header.getAccessibleContext();
       try {
            c.getAccessibleChild(0); // call the Method
            System.out.println("Ok");
       } catch (Exception e) {
            e.printStackTrace();
            System.out.println("Failed");

       }

       try {
            ((AccessibleComponent)c).getAccessibleAt(new java.awt.Point(0,0));
// call the Method
            System.out.println("Ok");
       } catch (Exception e) {
            e.printStackTrace();
            System.out.println("Failed");

       }
  
  
  }
 
}-------------jdk1.3 output---------
java.lang.NullPointerException
        at javax.swing.table.JTableHeader$AccessibleJTableHeader.getAccessibleChild(JTableHeader.java, Compiled Code)
        at Test.main(Test.java, Compiled Code)
Failed
java.lang.NullPointerException
        at javax.swing.table.JTableHeader$AccessibleJTableHeader.getAccessibleAt(JTableHeader.java, Compiled Code)
        at Test.main(Test.java, Compiled Code)
Failed

------------jdk1.2.2 output -------
Ok
Ok

 

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