### Question:
JenaNodeFormatter { public static String format(RDFNode n) { return format(n.asNode()); } private  JenaNodeFormatter(); static String format(RDFNode n); static String format(Node node);  }### Answer:
@Test public void testBlankNode() { assertEquals("_:x", JenaNodeFormatter.format(NodeFactory.createBlankNode("x"))); }
@Test public void testUri() { assertEquals("x", JenaNodeFormatter.format(NodeFactory.createURI("x"))); }
@Test public void testPlainLiteral() { assertEquals("\"x\"", JenaNodeFormatter.format(NodeFactory.createLiteral("x"))); }
@Test public void testLangLiteral() { assertEquals("\"x\"@en", JenaNodeFormatter.format(NodeFactory.createLiteral("x", "en"))); }
@Test public void testLangLiteralCaseInsensitive() { assertEquals("\"x\"@en", JenaNodeFormatter.format(NodeFactory.createLiteral("x", "EN"))); }
@Test public void testTypedLiteral() { assertEquals("\"1\"^^<http: }