Vous n’avez pas trouvé la réponse que vous recherchez ?
Posez votre questionDatasetProducer pieData = new DatasetProducer() { final int fruits[]= {2000, 3000, 4500, 6500}; public Object produceDataset(Map params) { final String[] categories = {"Bananes", "pommes", "nectarines", "cerises" }; DefaultPieDataset ds = new DefaultPieDataset(); for (int i = 0; i < categories.length; i++) { ds.setValue(categories[i], fruits[i]); } return ds; } public String getProducerId() { return "PieDataProducer"; } public boolean hasExpired(Map params, java.util.Date since) { return false; } }; pageContext.setAttribute("pieData", pieData); %> <HTML> <HEAD> <META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <META name="GENERATOR" content="IBM WebSphere Studio"> </HEAD> <TR><TR><TR><TR> <%if (pieData!=null){%> <TR> <TR> gradientpaint acyclic <cewolf:chart id=\"pieChart\" title=\"RESULTAT REPRESENTANT\" type=\"pie\"> <cewolf:gradientpaint> <cewolf:point x=\"0\" y=\"0\" color=\"#FFFFFF\" /> <cewolf:point x=\"300\" y=\"0\" color=\"#DDDDFF\" /> </cewolf:gradientpaint> <cewolf:data> <cewolf:producer id=\"pieData\" /> </cewolf:data> </cewolf:chart> <cewolf:img chartid=\"pieChart \" renderer=\"/cewolf/site/gestionDesCourbes\" width=\"400\" height=\"400\"/>
java.lang.NullPointerException raised: null