Inhalt:

Anmerkung: Beide Charts XdevAreaChart und XdevSteppedAreaChart besitzen die selben Implementierungen. Es ändern sich nur die Name, die Einstellungen sind aber identisch.

Optimale Datenstruktur (Datenbank):

Kategorie	Y-Achse	X-Achse
Kunden	2013	4500
Kunden	2014	9500
Kunden	2015	10850
...
Verkäufe	2013	1200
Verkäufe	2014	8500
...

Optimale Objektstruktur (Java)

public class AreaChartObject {
	private String category;
	private String y_axis;
	private Integer x_axis;

	public String getCategory() {
		return this.category;
	}

	public void setCategory(final String category) {
		this.category = category;
	}

	public String getY_axis() {
		return this.y_axis;
	}

	public void setY_axis(final String y_axis) {
		this.y_axis = y_axis;
	}

	public Integer getX_axis() {
		return this.x_axis;
	}

	public void setX_axis(final Integer x_axis) {
		this.x_axis = x_axis;
	}
}

Beispiel: Füllen der Daten

//Erstellen Model und hinzufügen der Kategorien
final ChartModel model = ChartModel.New()
	.addColumn(Column.New(Type.STRING, "year", "Jahr"))
	.addColumn(Column.New(Type.NUMBER, "sales", "Verkäufe"))
	.addColumn(Column.New(Type.NUMBER, "customer", "Kunden"));

//Füllen der Items
model.addRow("2013", "6500", 6500);
model.addRow("2014", "4321", 4321);
model.addRow("2015", "9460", 9460);
model.addRow("2016", "7450", 7450);
		
model.addRow("2013", "1500", 1500);
model.addRow("2014", "2850", 2850);
model.addRow("2015", "685", 685);
model.addRow("2016", "4850", 4850);

//Setzen des Models
areaChart.setModel(model);

API und Methoden:

Konfiguration Linien und Punkte

Properties
PointShape	The shape of individual data elements: 'circle', 'triangle', 'square', 'diamond', 'star', or 'polygon'. areaChart.setPointShape(PointShape.New(PointShape.Type.CIRCLE)); For detailed informations see: https://developers.google.com/chart/interactive/docs/points
PointSize	Diameter of displayed points in pixels. Use zero to hide all points. You can override values for individual series using the `series` property. If you're using a trendline, the `pointSize` option will affect the width of the trendline unless you override it with the `trendlines.n.pointsize` option. areaChart.setPointSize(5);
PointVisible	Determines whether points will be displayed. Set to `false` to hide all points. areaChart.setPointsVisible(true);
LineDashStyle	The on-and-off pattern for dashed lines. For instance, `[4, 4]` will repeat 4-length dashes followed by 4-length gaps, and `[5, 1, 3]` will repeat a 5-length dash, a 1-length gap, a 3-length dash, a 5-length gap, a 1-length dash, and a 3-length gap. See Dashed Lines for more information. areaChart.setLineDashStyle(Arrays.asList(4,4,4));
LineWidth	Data line width in pixels. Use zero to hide all lines and show only the points. You can override values for individual series using the `series` property. areaChart.setLineWidth(5);
SelectionMode	When `selectionMode` is `'multiple'`, users may select multiple data points. areaChart.setSelectionMode(SelectionMode.MULTIPLE);
Orientation	The orientation of the chart. When set to `'vertical'`, rotates the axes of the chart so that (for instance) a column chart becomes a bar chart, and an area chart grows rightward instead of up: areaChart.setOrientation(Orientation.HORIZONTAL);
DataOpacity	The transparency of data points, with 1.0 being completely opaque and 0.0 fully transparent. areaChart.setDataOpacity(0.8);