JSP Error Line Charts & Graphs

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<%@ page language="java" contentType="text/html; charset=UTF-8"	pageEncoding="UTF-8"%>
<%@ page import="java.util.*" %>
<%@ page import="com.google.gson.Gson"%>
<%@ page import="com.google.gson.JsonObject"%>

<%
Gson gsonObj = new Gson();
Map<Object,Object> map = null;
List<Map<Object,Object>> list = new ArrayList<Map<Object,Object>>();

map = new HashMap<Object,Object>(); map.put("label", "Jan"); map.put("y", 3.69); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "Feb"); map.put("y", 3.06); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "Mar"); map.put("y", 4.08); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "Apr"); map.put("y", 4.06); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "May"); map.put("y", 4.48); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "Jun"); map.put("y", 3.45); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "Jul"); map.put("y", 4.17); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "Aug"); map.put("y", 4.05); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "Sep"); map.put("y", 4.05); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "Oct"); map.put("y", 3.5); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "Nov"); map.put("y", 4); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "Dec"); map.put("y", 3.86); list.add(map);

String dataPoints1 = gsonObj.toJson(list);

list = new ArrayList<Map<Object,Object>>();
map = new HashMap<Object,Object>(); map.put("label", "Jan"); map.put("y", new Double[] {3.6,3.8}); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "Feb"); map.put("y", new Double[] {3.0,3.4}); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "Mar"); map.put("y", new Double[] {3.8,4.3}); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "Apr"); map.put("y", new Double[] {3.9,4.2}); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "May"); map.put("y", new Double[] {4.3,4.6}); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "Jun"); map.put("y", new Double[] {3.3,3.6}); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "Jul"); map.put("y", new Double[] {4.0,4.4}); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "Aug"); map.put("y", new Double[] {3.9,4.3}); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "Sep"); map.put("y", new Double[] {3.8,4.2}); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "Oct"); map.put("y", new Double[] {3.4,3.7}); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "Nov"); map.put("y", new Double[] {3.8,4.2}); list.add(map);
map = new HashMap<Object,Object>(); map.put("label", "Dec"); map.put("y", new Double[] {3.7,4.0}); list.add(map);

String dataPoints2 = gsonObj.toJson(list);
%>

<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script type="text/javascript">
window.onload = function() { 

var chart = new CanvasJS.Chart("chartContainer", {
	animationEnabled: true,
	theme: "light2",
	title:{
		text: "Predicted Rainfall - 2018"
	},
	axisX: {
		interval: 1
	},
	axisY:{
		title: "Precipitation (in inches)",
		suffix: " in"
	},
	toolTip: {
		shared: true
	},
	data: [{
		type: "line",
		name: "Predicted",
		toolTipContent: "<b>{label}</b><br>{name}: {y} in",
		markerType: "none",
		dataPoints: <%out.print(dataPoints1);%>
	},
	{
		type: "error",
		name: "Error Range",
		toolTipContent: "{name}: {y[0]} in - {y[1]} in",
		dataPoints: <%out.print(dataPoints2);%>
	}]
});
chart.render();

}
</script>
</head>
<body>
<div id="chartContainer" style="height: 370px; width: 100%;"></div>
<script src="https://cdn.canvasjs.com/canvasjs.min.js"></script>
</body>
</html>