Contains Number Method

public boolean containsNumbers(String cad){
        if(cad.contains("0") || cad.contains("1")|| cad.contains("2")
            || cad.contains("3")|| cad.contains("4")|| cad.contains("5")
            || cad.contains("6")|| cad.contains("7")|| cad.contains("8")
            || cad.contains("9")){

            return true;
        }else{
            return false;
        }

}