public static void main(String[] args) {
    // All methods in EChart Java supports method chaining
    Bar bar = new Bar()
              .setLegend()
              .setTooltip("item")
              .addXAxis(new String[] { "Matcha Latte", "Milk Tea", "Cheese Cocoa", "Walnut Brownie" })
              .addYAxis()
              .addSeries("2015", new Number[] { 43.3, 83.1, 86.4, 72.4 })
              .addSeries("2016", new Number[] { 85.8, 73.4, 65.2, 53.9 })
              .addSeries("2017", new Number[] { 93.7, 55.1, 82.5, 39.1 });
    Engine engine = new Engine();
    // The render method will generate our EChart into a HTML file saved locally in the current directory.
    // The name of the HTML can also be set by the first parameter of the function.
    engine.render("index.html", bar);
}

public static void main(String[] args) {
    Line lineChart = new Line()
                .addXAxis(new CategoryAxis()
                        .setData(new String[] { "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun" })
                        .setBoundaryGap(false))
                .addYAxis()
                .addSeries(new LineSeries()
                        .setData(new Number[] { 820, 932, 901, 934, 1290, 1330, 1320 })
                        .setAreaStyle(new LineAreaStyle()));
    Engine engine = new Engine();
    // It is recommended that you can  get the serialized version of Option in the representation of JSON, which can be used directly in the template or in the RESTful APIs.
    String jsonStr = engine.renderJsonOption(lineChart);
}