Details of Sample.java Changes

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o From the code above, we are getting data back as an array of
JSON data.
o So we use the asArrayOfStockData() method
o We fix this method to handle JSON data like this:

	/**
	 * Convert the string of JSON into JavaScript object.
	 */
	private final native JsArray asArrayOfStockData(String json) /*-{
		return eval(json);
	}-*/;

o Replace the eclipse code with the above code for asArrayOfStockData()
o It is using JavaScript Native Interface (JSNI). See: http://www.gwtproject.org/doc/latest/DevGuideCodingBasicsJSNI.html
for moe details
o JSNI integrate javascript directly into Java source code
o /*-{return eval(json);}-*/;
o It calls the eval() javascript method on the browser side.
o That is, it evaluates the JSON data