HTML.Tag is a public inner class in the
javax.swing.text.html.HTML class.
public static class HTML.Tag extends Object
It has these four methods:
public boolean isBlock()
public boolean breaksFlow()
public boolean isPreformatted()
public String toString()
The breaksFlow() method returns true if the tag should cause a
single line break.
The isBlock() method returns true if the tag
should cause a double line break.
The isPreformatted() method
returns true if the tag indicates that white space should be preserved.