JavaStringsplit()

public class Test {
    public static void main(String[] args) {
        String cmower = "";
        if (cmower.contains("")) {
            String [] parts = cmower.split("");
            System.out.println("" + parts[0] +" " + parts[1]);
        } else {
            throw new IllegalArgumentException("");
        }
    }
}

String cmower = ".";
if (cmower.contains(".")) {
    String [] parts = cmower.split("\\.");
    System.out.println("" + parts[0] +" " + parts[1]);
}

cmower.split("[.]");

String [] parts = cmower.split(Pattern.quote("."));

return Pattern.compile(regex).split(this, limit);

public class TestPatternSplit {
    private static Pattern twopart = Pattern.compile("\\.");

    public static void main(String[] args) {
        String [] parts = twopart.split(".");
        System.out.println("" + parts[0] +" " + parts[1]);
    }
}

public class TestPatternMatch {
    /**
     * 
     */
    private static Pattern twopart = Pattern.compile("(.+)\\.(.+)");

    public static void main(String[] args) {
        checkString(".");
        checkString(".");
        checkString(".");
    }

    private static void checkString(String str) {
        Matcher m = twopart.matcher(str);
        if (m.matches()) {
            System.out.println("" + m.group(1) + " " + m.group(2));
        } else {
            System.out.println("");
        }
    }
}

String cmower = "";
if (cmower.contains("")) {
    String [] parts = cmower.split("(?<=)");
    System.out.println("" + parts[0] +" " + parts[1]);
}

String [] parts = cmower.split("(?=)");

String cmower = "";
if (cmower.contains("")) {
    String [] parts = cmower.split("", 2);
    System.out.println("" + parts[0] +" " + parts[1]);
}