<script src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js" ></script>
<script src="ajaxGetPost.js" ></script>
<script src="https://www.google.com/jsapi"></script>
<script>
$(document).ready(function () 
{
url='world-population-density.json'; // API URL
ajax_data('GET',url, function(data)
{
charts(data,"ColumnChart"); // Column Charts
charts(data,"PieChart"); // Pie Charts
charts(data,"BarChart"); // Bar Charts
charts(data,"GeoChart"); // Geo Charts
});
});
</script>

function charts(data,ChartType)
{
var c=ChartType;
var jsonData=data;
google.load("visualization", "1", {packages:["corechart"], callback:drawVisualization});
function drawVisualization() 
{
var data = new google.visualization.DataTable();
data.addColumn('string', 'Country');
data.addColumn('number', 'Population Density');
$.each(jsonData, function(i,jsonData)
{
var value=jsonData.value;
var name=jsonData.name;
data.addRows([ [name, value]]);
});

var options = {
title : "Word Population Density",
animation:{ 
duration: 3000, 
easing: 'out', 
startup: true
},
colorAxis: {colors: ['#54C492', '#cc0000']},
datalessRegionColor: '#dedede',
defaultColor: '#dedede'
};

var chart;
if(c=="ColumnChart") // Column Charts
chart=new google.visualization.ColumnChart(document.getElementById('chart_div'));
else if(c=="PieChart") // Pie Charts
chart=new google.visualization.PieChart(document.getElementById('piechart_div'));
else if(c=="BarChart") // Bar Charts
chart=new google.visualization.BarChart(document.getElementById('bar_div'));
else if(c=="GeoChart") // Geo Charts
chart=new google.visualization.GeoChart(document.getElementById('regions_div'));

chart.draw(data, options);
}
}

<div id="chart_div"></div>
<div id="regions_div" ></div>
<div id="piechart_div" ></div>
<div id="bar_div" ></div>

[
{
"code": "GB",
"value": 257,
"name": "United Kingdom"
},
{
"code": "US",
"value": 34,
"name": "United States"
},
{
"code": "IN",
"value": 394,
"name": "India"
},
{
"code": "CN",
"value": 143,
"name": "China"
},
{
"code": "BR",
"value": 23,
"name": "Brazil"
},
{
"code": "WA",
"value": 152,
"name": "Qatar"
},
.............
.............
]

var options = {
title : "Word Population Density",
is3D: true, //Pie Charts
colors : ['#54C492','#f96302' ], //Bar of Pie Charts
animation:{ 
duration: 3000, 
easing: 'out', 
startup: true
},
vAxis: {title: "Vertical Axis Title"}, //Bar of Pie Charts
hAxis: {title: "Horizontal Axis Title "}, //Bar of Pie Charts
colorAxis: {colors: ['#54C492', '#cc0000']}, //Geo Charts
datalessRegionColor: '#dedede', //Geo Charts
defaultColor: '#dedede' //Geo Charts
};

function ajax_data(type, url, success)
{
$.ajax({
type:type,
url:url,
dataType:"json",
cache:false,
timeout:20000,
beforeSend :function(data) { },
success:function(data){
success.call(this, data);
},
error:function(data){
alert("Error In Connecting");
}
});
}