The spec for TableCellRenderer.getTableCellRendererComponent() says:

   * @param table the <code>JTable</code> that is asking the
   * renderer to draw; can be <code>null</code>

But DefaultTableCellRenderer implementation will throw NPE if 'null' table is passed. Please see the following code sample:

---
import javax.swing.*;

public class NPE {

    public static void main(String[] args) {
        new JTable().getDefaultRenderer(Object.class).
                getTableCellRendererComponent(null, "a value", true, true, 0, 0);
    }
}
---
Exception in thread "main" java.lang.NullPointerException
at javax.swing.table.DefaultTableCellRenderer.getTableCellRendererComponent(DefaultTableCellRenderer.java:177)
...
---

The following JCK test fails:

api/javax_swing/table/TableCellRenderer/index.html#GetComponent[TableCellRenderer0001]

JCK-runtime-7 b03
JDK: 6, 7
Platforms: Windows, Solaris
There is no this test in jdk 1.5.0 but the same problem exists.