java.lang.NullPointerException

ZK-Tracker | roliroli | 3 years ago
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  1. 0

    I want to display chart with Chinese, so I change library setting in the run time. {code} org.zkoss.lang.Library.setProperty("org.zkoss.zss.chart.title.font", "SansSerif, Italic, 30"); org.zkoss.lang.Library.setProperty("org.zkoss.zss.chart.legend.font", "SansSerif, plain, 18"); org.zkoss.lang.Library.setProperty("org.zkoss.zss.chart.xAxisTick.font", "SansSerif, bold, 16"); org.zkoss.lang.Library.setProperty("org.zkoss.zss.chart.xAxis.font", "SansSerif, bold, 18"); {code} After I set above property, if there exist a chart without title throws NPE: {quote} 嚴重的: >>java.lang.NullPointerException >> at org.zkoss.zkex.zul.impl.JFreeChartEngine.drawChart(JFreeChartEngine.java:364) >> at org.zkoss.zul.Chart.doSmartDraw(Chart.java:243) >> at org.zkoss.zul.Chart.access$100(Chart.java:82) >> at org.zkoss.zul.Chart$SmartDrawListener.onEvent(Chart.java:224) >> at org.zkoss.zk.ui.AbstractComponent.onEvent(AbstractComponent.java:2743) >> at org.zkoss.zk.ui.AbstractComponent.service(AbstractComponent.java:2714) >> at org.zkoss.zk.ui.AbstractComponent.service(AbstractComponent.java:2655) >> at org.zkoss.zk.ui.impl.EventProcessor.process(EventProcessor.java:136) >> at org.zkoss.zk.ui.impl.UiEngineImpl.processEvent(UiEngineImpl.java:1720) >> at org.zkoss.zk.ui.impl.UiEngineImpl.process(UiEngineImpl.java:1505) >> at org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage0(UiEngineImpl.java:467) >> at org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage(UiEngineImpl.java:312) >> at org.zkoss.zk.ui.http.DHtmlLayoutServlet.process(DHtmlLayoutServlet.java:215) >> at org.zkoss.zk.ui.http.DHtmlLayoutServlet.doGet(DHtmlLayoutServlet.java:136) >> at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) >> at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) >> at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) >> at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:401) >> at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) >> at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) >> at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766) >> at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450) >> at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) >> at org.mortbay.jetty.Server.handle(Server.java:326) >> at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) >> at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928) >> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549) >> at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) >> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) >> at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410) >> at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) {quote} You can use chart-issue.xlsx to reproduce this issue, by using the library setting code above.

    ZK-Tracker | 3 years ago | roliroli
    java.lang.NullPointerException
  2. 0

    I want to display chart with Chinese, so I change library setting in the run time. {code} org.zkoss.lang.Library.setProperty("org.zkoss.zss.chart.title.font", "SansSerif, Italic, 30"); org.zkoss.lang.Library.setProperty("org.zkoss.zss.chart.legend.font", "SansSerif, plain, 18"); org.zkoss.lang.Library.setProperty("org.zkoss.zss.chart.xAxisTick.font", "SansSerif, bold, 16"); org.zkoss.lang.Library.setProperty("org.zkoss.zss.chart.xAxis.font", "SansSerif, bold, 18"); {code} After I set above property, if there exist a chart without title throws NPE: {quote} 嚴重的: >>java.lang.NullPointerException >> at org.zkoss.zkex.zul.impl.JFreeChartEngine.drawChart(JFreeChartEngine.java:364) >> at org.zkoss.zul.Chart.doSmartDraw(Chart.java:243) >> at org.zkoss.zul.Chart.access$100(Chart.java:82) >> at org.zkoss.zul.Chart$SmartDrawListener.onEvent(Chart.java:224) >> at org.zkoss.zk.ui.AbstractComponent.onEvent(AbstractComponent.java:2743) >> at org.zkoss.zk.ui.AbstractComponent.service(AbstractComponent.java:2714) >> at org.zkoss.zk.ui.AbstractComponent.service(AbstractComponent.java:2655) >> at org.zkoss.zk.ui.impl.EventProcessor.process(EventProcessor.java:136) >> at org.zkoss.zk.ui.impl.UiEngineImpl.processEvent(UiEngineImpl.java:1720) >> at org.zkoss.zk.ui.impl.UiEngineImpl.process(UiEngineImpl.java:1505) >> at org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage0(UiEngineImpl.java:467) >> at org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage(UiEngineImpl.java:312) >> at org.zkoss.zk.ui.http.DHtmlLayoutServlet.process(DHtmlLayoutServlet.java:215) >> at org.zkoss.zk.ui.http.DHtmlLayoutServlet.doGet(DHtmlLayoutServlet.java:136) >> at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) >> at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) >> at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) >> at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:401) >> at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) >> at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) >> at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766) >> at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450) >> at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) >> at org.mortbay.jetty.Server.handle(Server.java:326) >> at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) >> at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928) >> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549) >> at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) >> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) >> at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410) >> at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) {quote} You can use chart-issue.xlsx to reproduce this issue, by using the library setting code above.

    ZK-Tracker | 3 years ago | roliroli
    java.lang.NullPointerException

    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at org.zkoss.zkex.zul.impl.JFreeChartEngine.drawChart()
    2. org.zkoss.zkex
      JFreeChartEngine.drawChart
      1. org.zkoss.zkex.zul.impl.JFreeChartEngine.drawChart(JFreeChartEngine.java:364)
      1 frame
    3. ZK XUL Components
      Chart$SmartDrawListener.onEvent
      1. org.zkoss.zul.Chart.doSmartDraw(Chart.java:243)
      2. org.zkoss.zul.Chart.access$100(Chart.java:82)
      3. org.zkoss.zul.Chart$SmartDrawListener.onEvent(Chart.java:224)
      3 frames
    4. ZK Kernel
      DHtmlLayoutServlet.doGet
      1. org.zkoss.zk.ui.AbstractComponent.onEvent(AbstractComponent.java:2743)
      2. org.zkoss.zk.ui.AbstractComponent.service(AbstractComponent.java:2714)
      3. org.zkoss.zk.ui.AbstractComponent.service(AbstractComponent.java:2655)
      4. org.zkoss.zk.ui.impl.EventProcessor.process(EventProcessor.java:136)
      5. org.zkoss.zk.ui.impl.UiEngineImpl.processEvent(UiEngineImpl.java:1720)
      6. org.zkoss.zk.ui.impl.UiEngineImpl.process(UiEngineImpl.java:1505)
      7. org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage0(UiEngineImpl.java:467)
      8. org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage(UiEngineImpl.java:312)
      9. org.zkoss.zk.ui.http.DHtmlLayoutServlet.process(DHtmlLayoutServlet.java:215)
      10. org.zkoss.zk.ui.http.DHtmlLayoutServlet.doGet(DHtmlLayoutServlet.java:136)
      10 frames
    5. JavaServlet
      HttpServlet.service
      1. javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
      2. javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
      2 frames
    6. Jetty Server
      SelectChannelEndPoint.run
      1. org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
      2. org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:401)
      3. org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
      4. org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
      5. org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
      6. org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)
      7. org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
      8. org.mortbay.jetty.Server.handle(Server.java:326)
      9. org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
      10. org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928)
      11. org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
      12. org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
      13. org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
      14. org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
      14 frames
    7. Jetty Util
      QueuedThreadPool$PoolThread.run
      1. org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
      1 frame