Extract numbers from an alpha numeric string using android

Question

I have to extract only numeric values from String str=\"sdfvsdf68fsdfsf8999fsdf09\". How can I extract numbers from an alpha numeric string in android?

Answer 1

public static String getOnlyNumerics(String str) {

    if (str == null) {
        return null;
    }

    StringBuffer strBuff = new StringBuffer();
    char c;

    for (int i = 0; i < str.length() ; i++) {
        c = str.charAt(i);

        if (Character.isDigit(c)) {
            strBuff.append(c);
        }
    }
    return strBuff.toString();
}