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    org.apache.http.config.Lookup class is in httpcore-4.3.jar not in httpclient-4.3.1.jar

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java.lang.NoClassDefFoundError: 	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(	at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(	at javax.swing.text.html.CSS.getValidFontNameMapping(	at javax.swing.text.html.CSS$FontFamily.parseCssValue(	at javax.swing.text.html.CSS.getInternalCSSValue(	at javax.swing.text.html.CSS.addInternalCSSValue(	at javax.swing.text.html.StyleSheet.addCSSAttribute(	at javax.swing.text.html.HTMLDocument$HTMLReader$ConvertAction.start(	at javax.swing.text.html.HTMLDocument$HTMLReader.handleStartTag(	at javax.swing.text.html.parser.DocumentParser.handleStartTag(	at javax.swing.text.html.parser.Parser.startTag(	at javax.swing.text.html.parser.Parser.parseTag(	at javax.swing.text.html.parser.Parser.parseContent(	at javax.swing.text.html.parser.Parser.parse(	at javax.swing.text.html.parser.DocumentParser.parse(	at javax.swing.text.html.parser.ParserDelegator.parse(	at	at HTMLReader.FindHTMLFiles(	at HTMLReader.FindHTMLFiles(	at DocumentManager.addFile(