BarChart / ColumnChart

public class BarChartObject {

    private String yvalue;
    private String category;
    private Integer xvalue;

    public String getYvalue() {
        return this.yvalue;
    }

    public void setYvalue(final String yvalue) {
        this.yvalue = yvalue;
    }

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

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

    public Integer getXvalue() {
        return this.xvalue;
    }

    public void setXvalue(final Integer xvalue) {
        this.xvalue = xvalue;
    }
}

// Create model
final ChartModel model = ChartModel.New()
    .addColumn(Column.New(Type.STRING, "year", "Jahr"))
    .addColumn(Column.New(Type.NUMBER, "iphone", "iPhone"))
    .addColumn(Column.New(Type.NUMBER, "android", "Android"));

// Add items to model
model.addRow("2014", 1500, 1200);
model.addRow("2015", 805, 700);
model.addRow("2016", 920, 600);
model.addRow("2017", 1250, 1500);

// Set model
barChart.setModel(model);