• First download the jar from the project home page http://code.google.com/p/gchart/
  • Put it under war/WEB-INF/lib and add the gchart.jar to your classpath
  • Create a  Web Application project called it GChart-samples (I assume you have Google Eclipse Plugin and follow the basic steps from​​here​​)
  • This step is for make-up, find GChart_samples.html under war/WEB-INF and clear the part between <body> tags.
  • Open GChart_samples.gwt.xml and add the following line<inherits name='com.googlecode.gchart.GChart'/>
  • package com.dogan.kaya.client; 
• import com.googlecode.gchart.client.GChart;

public class FirstChart extends GChart
{
  public FirstChart()
  {
    setChartSize(350, 350);

    addCurve();

    int[] data = { 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 };
    for (int i = 0; i < data.length; i++)
    {
      getCurve().addPoint(i + 1, data[i]);
    }
    //curve customization
    getCurve().getSymbol().setHeight(10);
    getCurve().getSymbol().setWidth(10);
    getCurve().getSymbol().setBorderColor("black");
    getCurve().getSymbol().setBorderWidth(3);
    getCurve().getSymbol().setSymbolType(SymbolType.LINE);
    getCurve().getSymbol().setFillThickness(2);
    getCurve().getSymbol().setFillSpacing(0);
    //chart customization
    getXAxis().setAxisMin(1);
    getXAxis().setAxisMax(12);
    getXAxis().setTickCount(12);
    getXAxis().setHasGridlines(false);
    getXAxis().setTickLocation(TickLocation.CENTERED);
    getXAxis().setTickLabelFontSize(10);
    getYAxis().setAxisMin(0);
    getYAxis().setAxisMax(12);
    //to get inteter values on y axis, be careful
    //about the number of intervals it can be tricky
    getYAxis().setTickCount(13);
    getYAxis().setTicksPerLabel(2);
    getYAxis().setHasGridlines(false);
    getYAxis().setTickLabelFontSize(10);
    //
    update();
  }
}
  • Open GChart_samples class and change it like the followingpackage com.dogan.kaya.client; 
• import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.ui.RootPanel;

public class GChart_samples implements EntryPoint
{
  public void onModuleLoad()
  {
    RootPanel.get().add(new FirstChart());//这句比较灵活
  }
}