public class StrMirror {

    private String input;


    public StrMirror(String input) {
        this.input = input;

    }

    public StrMirror() {
        this("");
    }

    public void setString(String newInput) {
        input = newInput;
    }

    public String getString() {
        return input;
    }

    public String mirror() {
        char inputChar[] = input.toCharArray();
        String mirrored="";
        for (int i=1;i<=inputChar.length;i++) mirrored += inputChar[inputChar.length-i];
        return mirrored;
    }

    public String mirrorR() {
        mirrorR(input)
    }

    public String mirrorR(String input) {

        if (input.length() <= 1) {
            return input;}

        // Andernfalls Rekursion: Aufruf der Operation mit
        // dem Teilstring ohne den 0. Buchstaben von s: (s.substring(1)) und anhängen des
        // nullten Buchstaben vom String s, s.charAt(0).
        else {  //Rekursion
        //
            return (mirrorR(input.substring(1)) + input.charAt(0));

//The method ... is not applicable for the argument (String)...
        }
    }






    public static void main(String[] string){

        StrMirror m = new StrMirror("Beispiel");
        System.out.println(m.getString() + " --> " + m.mirror());
        m.setString("Rekursion");
        System.out.println(m.getString() + " --> " + m.mirrorR());


}
}