private String charToString(byte ch){
		
    	String str;
    	
    	switch (ch) {
		case ' ':
			str = "Space 32 ";
			break;
		case '\t':
			str = "TAB 9";
			break;
		case '\n':
			str = "LF 10";
			break;
		case '\r':
			str = "CR 13";
			break;

		default:
			str = "";
			break;
		}
    	
    	return str;
    	
    }