How to connect Options Group to mysql database for storing information?

I am using OptionsGroup for star rating so to store the info in mysql table

OptionGroup group = new OptionGroup(" Star Rating");
                group.addItem("1 star");
                group.addItem("2 star");
                group.addItem("3 star");
                group.addItem("4 star");
                group.addItem("5 star");
                group.addStyleName("horizontal");
                group.setSizeUndefined();
                rightTopForm.addComponent(group);

How can i add listner to above so that on clicking info i can store the same in mysql.

Hi, you can add a ValueChangeListener like the following:

group.addValueChangeListener(e -> {
    // your logic here
});

Also, you may need to make the OptionGroup immediate:

group.setImmediate(true);