Not sure if this is for all chart types, i'm using a scatterchart and when my x axis is a NumberAxis I can use the ticklabelrotation method, but when it is a CategoryAxis I can still use the method but it doesn't show on the plot itself. seems to be overridden by internal smarts to show text horizontally or vertically.

to be clear
javafx.scene.chart.CategoryAxis;
javafx.scene.chart.NumberAxis;
javafx.scene.chart.ScatterChart;

example usage
ScatterPlot.getYAxis().setTickLabelRotation(75);
ScatterPlot.getXAxis().setTickLabelRotation(75);