java - JFreeChart implementation error -


import java.io.*; import org.jfree.data.category.defaultcategorydataset; import org.jfree.chart.chartfactory;  import org.jfree.chart.plot.plotorientation; import org.jfree.chart.jfreechart;  import org.jfree.chart.chartutilities;  public class xyline {         public static void main(string[] args){          try {                  /* step - 1: define data line chart  */                 defaultcategorydataset line_chart_dataset = new defaultcategorydataset();                 line_chart_dataset.addvalue(15, "schools", "1970");                 line_chart_dataset.addvalue(30, "schools", "1980");                 line_chart_dataset.addvalue(60, "schools", "1990");                 line_chart_dataset.addvalue(120, "schools", "2000");                 line_chart_dataset.addvalue(240, "schools", "2010");                                  /* step -2:define jfreechart object create line chart */                 jfreechart linechartobject=chartfactory.createlinechart("schools vs years","year","schools count",line_chart_dataset,plotorientation.vertical,true,true,false);                                  /* step -3 : write line chart file */                                 int width=640; /* width of image */                  int height=480; /* height of image */                                  file linechart=new file("line_chart_example.png");                                chartutilities.savechartaspng(linechart,linechartobject,width,height);           }          catch (exception i)          {              system.out.println(i);          }      }  } 

i creating line chart points on it. line causing problems follows... jfreechart linechartobject=chartfactory.createlinechart("schools vs years","year","schools count",line_chart_dataset,plotorientation.vertical,true,true,false);

the error is: type org.jfree.util.publiccloneable cannot resolved. indirectly referenced required .class files

i have tried adding in jar file(jfreechart-1.0.14.jar) still not work. appreciated.

you need jcommon-1.0.14.jar well. see downloading jfreechart more.


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