fail replacement.java

    private String strup(String s) {
        String strup = new String(s);
        if (strup.equals("")) {
            return "";
        }
        while (new Character(strup.charAt(strup.length() - 1)).toString().matches("[`~!@#$%^&*_=|?/,. ]")) {
            try {
                strup = strup.substring(0, strup.length() - 1);
                if (strup.equals("")) {
                    return "";
                }
            } catch (Exception e) {
                return "";
            }
        }
        Pattern test = Pattern.compile("^(.*?)[`~!@#$%^&*_=|?/,. ]*$");
        System.out.println(strup + " vs " + s);
        Matcher m = test.matcher(s);
        try {
                System.out.println(m.groupCount());
                System.out.println(m.group(0));
        } catch (Exception e) {
                e.printStackTrace();
        }
        try {
                System.out.println(m.group(1));
        } catch (Exception e) {
                e.printStackTrace();
                System.out.println(test);
        }
        return strup.trim();
    }

gistfile1.java

    private String strup(String s) {
        String strup = new String(s);
        if (strup.equals("")) {
            return "";
        }
        while (new Character(strup.charAt(strup.length() - 1)).toString().matches("[`~!@#$%^&*_=|?/,. ]")) {
            try {
                strup = strup.substring(0, strup.length() - 1);
                if (strup.equals("")) {
                    return "";
                }
            } catch (Exception e) {
                return "";
            }
        }
        return strup.trim();
    }