Don't forget about the samples in the gallery.

Simple Line Chart

response.write(new Chart(new Date().toString())
  .addElements(new LineChart()
    .addValues(9,8,7,6,5,4,3,2,1)));

Complex X Axis Labeling Chart

in PHP

Chart c = new Chart("X Axis Labels Complex Example")
  .addElements(new LineChart(Style.DOT)
    .addValues(9, 8, 7, 6, 5, 4, 3, 2, 1))
    .setXAxis(new XAxis()
      .setTickHeight(5)
      .addLabels("one", "two", "three", "four", "five")
      .addLabels(
        new Label("six")
          .setColour("#0000FF")
          .setSize(30)
          .setRotation(Rotation.VERTICAL),
        new Label("seven")
          .setColour("#0000FF")
          .setSize(30)
          .setRotation(Rotation.VERTICAL),
        new Label("eight")
          .setColour("#8C773E")
          .setSize(16)
          .setRotation(Rotation.DIAGONAL)
          .setVisible(true),
        new Label("nine")
          .setColour("#2683CF")
          .setSize(16)
          .setRotation(Rotation.HORIZONTAL)));

c.getXAxis()
  .setStroke(1)
  .setColour("#428C3E")
  .setGridColour("#86BF83")
  .setSteps(1);
     
c.getXAxis().getLabels()
  .setSteps(2)
  .setRotation(Rotation.VERTICAL)
  .setColour("#ff0000")
  .setSize(16);

response.write(c);