public class TimelineChartObject {
	private String y_category;
	private String x_category;
	private LocalDate start;
	private LocalDate end;

	public String getX_category() {
		return x_category;
	}

	public void setX_category(String x_category) {
		this.x_category = x_category;
	}

	public String getY_category() {
		return y_category;
	}

	public void setY_category(String y_category) {
		this.y_category = y_category;
	}

	public LocalDate getStart() {
		return start;
	}

	public void setStart(LocalDate start) {
		this.start = start;
	}

	public LocalDate getEnd() {
		return end;
	}

	public void setEnd(LocalDate end) {
		this.end = end;
	}
}

//Erstellen Model
final ChartModel model = ChartModel.New()
	.addColumn(Column.New(Type.STRING, "project", "project"))
	.addColumn(Column.New(Type.STRING, "task", "Task"))
	.addColumn(Column.New(Type.DATE, "from", "From"))
	.addColumn(Column.New(Type.DATE, "to", "To"));

model.addRow("Project 1", "Aufgabe 1", LocalDate.of(2018, 4, 28), LocalDate.of(2018, 5, 3));
model.addRow("Project 1", "Aufgabe 2",LocalDate.of(2018, 5, 1), LocalDate.of(2018, 5, 8));
model.addRow("Project 1", "Aufgabe 3",LocalDate.of(2018, 5, 6), LocalDate.of(2018, 5, 12));
model.addRow("Project 2", "Aufgabe 1",LocalDate.of(2018, 4, 28), LocalDate.of(2018, 5, 20));
model.addRow("Project 2", "Aufgabe 2",LocalDate.of(2018, 5, 6), LocalDate.of(2018, 5, 25));
model.addRow("Project 2", "Aufgabe 3",LocalDate.of(2018, 5, 21), LocalDate.of(2018, 5, 28));
model.addRow("Project 2", "Aufgabe 4",LocalDate.of(2018, 6, 6), LocalDate.of(2018, 6, 12));
model.addRow("Project 3", "Aufgabe 1",LocalDate.of(2018, 6, 1), LocalDate.of(2018, 6, 10));
model.addRow("Project 4", "Aufgabe 1",LocalDate.of(2018, 5, 28), LocalDate.of(2018, 6, 6));

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