问带点或不带全部的正则表达式

EN

if(pattern.matches) {

do something 

}

public static void userMarkBiology(){
do{
        System.out.print("Give Your mark from Biology");
    Pattern myPatterns=Pattern.compile("[2-5]+(\\.[5])");
    String mark=getUserThema();
if(myPatterns.matcher(mark).matches()){
    try{
        claasA.setUserMarkBiology(Double.valueOf(mark));
    }
    catch(PatternSyntaxException pse){
        System.out.println("--------------");
        System.out.println("Error, You have to use marks like, 4 lub 4.5");
    }
    catch(InputMismatchException e){
        System.out.println("--------------");
        System.out.println("Something is wrong!");

}
while(SystemyOceny.getKomunikacjaSpolecznaWyklad() ==null);