public static char[] replace(final char[] input)
	{

		int surLow = 0xD800;
		int surHgh = 0xDFFF;

		int end = input.length;
		char[] output = new char[end];

		for (int i = 0; i < end; i++) {
			if ((int) input[i] >= surLow && input[i] <= surHgh) {
				output[i] = '?';
			}
			else {
				output[i] = input[i];
			}
		}

		return output;
	}
public static char [ ] replace ( final char [ ] input ) { int surLow = 0xD800 ; int surHgh = 0xDFFF ; int end = input . length ; char [ ] output = new char [ end ] ; for ( int i = 0 ; i < end ; i ++ ) { if ( ( int ) input [ i ] >= surLow && input [ i ] <= surHgh ) { output [ i ] = '?' ; } else { output [ i ] = input [ i ] ; } } return output ; }
Replaces all surrogates characters with '?'.

@param input
input
@return input with '?' instead of surrogates characters