Line Chart with Data Labels

We have already seen the configuration used to draw this chart in Highcharts Configuration Syntax chapter. Let us now consider the following example to further understand a basic line chart with data labels.

Example

HelloWorld.java

package com.tutorialspoint.client;

import org.moxieapps.gwt.highcharts.client.Chart;
import org.moxieapps.gwt.highcharts.client.Series.Type;
import org.moxieapps.gwt.highcharts.client.ToolTip;
import org.moxieapps.gwt.highcharts.client.XAxis;
import org.moxieapps.gwt.highcharts.client.YAxis;
import org.moxieapps.gwt.highcharts.client.labels.DataLabels;
import org.moxieapps.gwt.highcharts.client.plotOptions.LinePlotOptions;

import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.ui.RootPanel;

public class HelloWorld implements EntryPoint {
   public void onModuleLoad() {
      Chart chart = new Chart()
         .setType(Type.LINE)
         .setChartTitleText("Monthly Average Temperature")
         .setChartSubtitleText("Source: WorldClimate.com");

      XAxis xAxis = chart.getXAxis();
      xAxis.setCategories("Jan", "Feb", "Mar", "Apr", "May", "Jun",
         "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");

      YAxis yAxis = chart.getYAxis();
      yAxis.setAxisTitleText("Temperature °C");
      yAxis.createPlotLine()
         .setValue(0)
         .setWidth(1)
         .setColor("#808080");

      ToolTip toolTip = new ToolTip(); 
      toolTip.setValueSuffix("°C"); 
      chart.setToolTip(toolTip);

      chart.setLinePlotOptions(new LinePlotOptions()  
         .setEnableMouseTracking(true)  
         .setDataLabels(new DataLabels()  
            .setEnabled(true)  
         )  
      );  

      chart.addSeries(chart.createSeries()
         .setName("Tokyo")
         .setPoints(new Number[] {
            7.0, 6.9, 9.5, 14.5, 18.2, 21.5, 25.2,
            26.5, 23.3, 18.3, 13.9, 9.6
         })
      ); 

      chart.addSeries(chart.createSeries()
         .setName("London")
         .setPoints(new Number[] {
            3.9, 4.2, 5.7, 8.5, 11.9, 15.2, 17.0, 
            16.6, 14.2, 10.3, 6.6, 4.8
         })
      );
      RootPanel.get().add(chart);
   }
}

Result

Verify the result.