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I have the following Java code that I use to parse JSON strings:

Pattern pa = Pattern.compile("\"([^\"]*?)\"\\s*:\\s*(\"[^\"]*?\"|\\d+|true|false|null|\\{.*?}|\\[.*?])");
Matcher ma = pa.matcher(json);

while (ma.find()) {
	// Key
	String fieldName = ma.group(1);
	String fieldValue = !ma.group(2).startsWith("\"") ? ma.group(2) : ma.group(2).substring(1, ma.group(2).length() - 1);

This code works verz well except when I test it for using this string:
{"CharValue": 'C'}

it does not return anything
fix it!