Remove Decimal values in Yaxis Linechart -Primefaces

You can define chart option yAxis.ticks.stepSize: 1 through a call to the method CartesianLinearTicks.setStepSize(Number stepSize).

In your code, this could look as follows:

LineChartOptions options = new LineChartOptions();
CartesianScales cScales = new CartesianScales();
CartesianLinearAxes linearAxes = new CartesianLinearAxes();
CartesianLinearTicks ticks = new CartesianLinearTicks();
ticks.setBeginAtZero(true);
ticks.setStepSize(1);
linearAxes.setTicks(ticks);
cScales.addYAxesData(linearAxes);
options.setScales(cScales);