jodd-json/src/main/java/jodd/json/JsonParser.java
protected char parseUnicode() {
		int i0 = CharUtil.hex2int(input[ndx++]);
		int i1 = CharUtil.hex2int(input[ndx++]);
		int i2 = CharUtil.hex2int(input[ndx++]);
		int i3 = CharUtil.hex2int(input[ndx]);

		return (char) ((i0 << 12) + (i1 << 8) + (i2 << 4) + i3);
	}
protected char parseUnicode() {
		int i0 = CharUtil.hex2int(input[ndx++]);
		int i1 = CharUtil.hex2int(input[ndx++]);
		int i2 = CharUtil.hex2int(input[ndx++]);
		int i3 = CharUtil.hex2int(input[ndx]);

		return (char) ((i0 << 12) + (i1 << 8) + (i2 << 4) + i3);
	}
Parses 4 characters and returns unicode character.