I have been searching codes to draw line charts using jfreechart on internetand encountering the constant problem of pack(). When I copy the code I find on net the compiler compiles it. But when I try to use it in my code, the compiler shows error. I don't find its definition in the copied code and I import all the header files from the code to resolve this but it's all useless. Please tell me what I m missing. I need an urgent help.
//My code is:
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package income;
import java.awt.BasicStroke;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Stroke;
import java.sql.*;
import java.text.NumberFormat;
import org.jfree.chart.*;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.xy.*;
import org.jfree.data.*;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.chart.plot.XYPlot;
import java.util.Date;
import javax.swing.JLabel;
import javax.swing.JPanel;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.labels.CategoryItemLabelGenerator;
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.renderer.category.LineAndShapeRenderer;
import org.jfree.data.category.CategoryDataset;
import org.jfree.ui.RefineryUtilities;
import org.jfree.ui.ApplicationFrame;
/**
*
* @author student
*/
ResultSet rs;
Statement stmt;
Connection con;
Date kk=new Date();
final XYSeries series=new XYSeries("Savings");
public SavingChart(final String title){
final CategoryDataset dataset =createDataset();
final JFreeChart chart=createChart(dataset);
final ChartPanel chartPanel = new ChartPanel(chart);
this.add(chartPanel,BorderLayout.CENTER);
JPanel customPanel = new JPanel();
JLabel lbl = new JLabel("<html><h3>Note : You can add any important note here.</h3></html>");
customPanel.add(lbl);
}
private void add(ChartPanel chartPanel, String CENTER) {
throw new UnsupportedOperationException("Not yet implemented");
}
private CategoryDataset createDataset() {
// create the dataset...
final DefaultCategoryDataset dataset = new DefaultCategoryDataset();
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con=DriverManager.getConnection("jdbc:odbc:Ek","","");
stmt=con.createStatement();
rs=stmt.executeQuery("select * from Saving");
while(rs.next())
{
dataset.addValue(rs.getFloat(2), "series", "2/2/2013");
}
}
catch(Exception e){System.out.println("Nahi Hua... :(");}
return dataset;
}
private JFreeChart createChart(final CategoryDataset dataset) {
final JFreeChart chart =ChartFactory.createLineChart(
"Your Saving Graphs", // charttitle
"Date", // domain(x-//axis) axis label
"V", // range(y-axis)//axis label
dataset, // data
PlotOrientation.VERTICAL, //orientation
true, // include legend
true, // tooltips
false // urls
);
chart.setBackgroundPaint(Color.white);
final CategoryPlot plot = (CategoryPlot)chart.getPlot();
plot.setBackgroundPaint(new Color(0xffffe0));
plot.setDomainGridlinesVisible(true);
plot.setDomainGridlinePaint(Color.lightGray);
plot.setRangeGridlinePaint(Color.lightGray);
final NumberAxis rangeAxis =(NumberAxis) plot.getRangeAxis();
rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
rangeAxis.setAutoRangeIncludesZero(true);
rangeAxis.setVerticalTickLabels(true);
final LineAndShapeRenderer renderer =(LineAndShapeRenderer) plot.getRenderer();
NumberFormat format =NumberFormat.getNumberInstance();
format.setMaximumFractionDigits(2);
CategoryItemLabelGenerator generator =new StandardCategoryItemLabelGenerator(StandardCategoryItemLabelGenerator.DEFAULT_LABEL_FORMAT_STRING,format);
renderer.setBaseItemLabelGenerator(generator);
renderer.setBaseItemLabelsVisible(true);
renderer.setBaseShapesFilled(true);
renderer.setBaseShapesVisible(true);
Stroke stroke = new BasicStroke(3f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL);
renderer.setBaseOutlineStroke(stroke);
return chart;
}
public static void main(String[] args){
SavingChart svc=new SavingChart("Savings");
svc.pack();
RefineryUtilities.centerFrameOnScreen(svc);
svc.setVisible(true);
}
}
Plz ignore errors.
